Publications

He has published 81 referred original journal papers, 194 international conference papers, and 6 book chapters including 5 JSSC, 4 TBioCAS, 2 TCAS-I, 2 TCAS-II, 1 OJCAS, 1 SSC-L,  5 TVLSI, 1 Scientific Reports, 3 ISSCC, 5 Symp. VLSI, 1 CICC, 4 A-SSCC, 1 ESSCIRC, 14 BioCAS, 3 ISCAS, 4 ISICAS, 1 AICAS, 2 MWSCAS, 10 ICECS, 9 APCCAS, 5 LASCAS, 2 NEWCAS, 5 NorCAS, 15 ASP-DAC, 1 MEMS, 2 ITC, and 1 ATTD. He gave 3 keynote talks, 3+ tutorials including NEWCAS 2018, APCCAS 2018, and LASCAS 2020. 

< 10 Selected Articles > 
  1. H. Kitaike, M. Inada, M. Terauchi, H. Tagawa, R. Nagai, S. Xu, R. Zhang, K. Liu, and K. Niitsu, "A 0.9-2.6pW 0.1-0.25V 22nm 2-bit Supply-to-Digital Converter Using Always-Activated Supply-Controlled Oscillator and Supply-Dependent-Activation Buffers for Bio-Fuel-Cell-Powered-and-Sensed Time-Stamped Bio-Recording", IEEE Symposium on VLSI Technology and Circuits (VLSI 2024), pp. 1-2,  Jun.2024.
    DOI:    10.1109/VLSITECHNOLOGYANDCIR46783.2024.10631372
  2. G. Chen, Y. Wang, T. M. Quan, N. Matsuyama, T. Tsujimura and K. Niitsu, “ A 0.5 mm2 Solar Cell-Powered Biofuel Cell-Input Biosensing System with LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens”, IEEE Solid-State Circuits Letters (SSC-L), vol. 5, pp. 41–44, Feb. 2022.
    DOI:10.1109/LSSC.2022.3151904
  3. K. Niitsu, T. Nakanishi, S. Murakami, M. Matsunaga, A. Kobayashi, N. M. Karim, J. Ito, N. Ozawa, T. Hase, H. Tanaka, M. Sato, H. Kondo, K. Ishikawa, H. Odaka, Y. Hasegawa, M. Hori, and K. Nakazato, "A 65-nm CMOS Fully Integrated Analysis Platform Using an On-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window for Analyzing Circulating Tumor Cell and Exosome", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol. 13, no. 2 pp.470-479, Apr. 2019.
    DOI:    10.1109/TBCAS.2018.2882472

  4. K. Hayashi, S. Arata, S. Murakami, Y. Nishio, A. Kobayashi, and K. Niitsu, "A 6.1nA Fully-Integrated CMOS Supply-Modulated OOK Transmitter in 55nm DDC CMOS for Glass-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEEE Transactions on Circuits and Systems II (TCAS-II), vol.65, no.10, pp.1360-1364, Oct. 2018. 
    DOI:    10.1109/TCSII.2018.2860636

  5. K. Niitsu, A. Kobayashi, K. Hayashi, Y. Nishio, K. Ikeda, T. Ando, Y. Ogawa, H. Kai, M. Nishizawa, and K. Nakazato, "A Self-Powered Supply-Sensing Biosensor Platform Using Bio Fuel Cell and Low-Voltage, Low-Cost CMOS Supply-Controlled Ring Oscillator with Inductive-Coupling Transmitter for Healthcare IoT", IEEE Transactions on Circuits and Systems I (TCAS-I), vol.65, no.9, pp.2784-2796, Sep. 2018.
    DOI:    10.1109/TCSI.2018.2791516

  6. A. Kobayashi, K. Ikeda, Y. Ogawa, H. Kai, M. Nishizawa, K. Nakazato, and K. Niitsu, "Design and Experimental Verification of 0.19 V 53 μW 65 nm CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter for a Self-Powered Bio-Sensing Using a Biofuel Cell", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.11, no.6, pp.1313-1323, Dec. 2017.
    DOI:    10.1109/TBCAS.2017.2735447

  7. K. Niitsu, S. Ota, K. Gamo, H. Kondo, M. Hori, and K. Nakazato, "Development of Microelectrode Arrays Using Electroless Plating for CMOS-Based Direct Counting of Bacterial and HeLa Cells", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.9, no.5, pp.607-619, Nov. 2015.   
    DOI: 10.1109/TBCAS.2015.2479656

  8. K. Niitsu, M. Sakurai, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, "CMOS Circuits to Measure Timing Jitter Using a Self-Referenced Clock and a Cascaded Time Difference Amplifier with Duty-Cycle Compensation",  IEEE Journal of Solid-State Circuits (JSSC), vol.47, no.11, pp.2701-2710, Nov. 2012.
    DOI:    10.1109/JSSC.2012.2211655

  9. K. Niitsu, N. Harigai, D. Hirabayashi, D. Oki, M. Sakurai, O. Kobayashi, T. J. Yamaguchi, and H. Kobayashi, "A Clock Jitter Reduction Circuit Using Gated Phase Blending Between Self-Delayed Clock Edges", IEEE Symposium on VLSI Circuits (VLSIC 2012),  pp. 144-143, Jun. 2012.
    DOI:    10.1109/VLSIC.2012.6243830
  10. K. Niitsu, Y. Shimazaki, Y. Sugimori, Y. Kohama, K. Kasuga, I. Nonomura, M. Saen, S. Komatsu, K. Osada, N. Irie, T. Hattori, A. Hasegawa, and T. Kuroda, "An Inductive-Coupling Link for 3D Integration of a 90nm CMOS Processor and a 65nm CMOS SRAM", IEEE International Solid-State Circuits Conference (ISSCC 2009), pp.480-481, Feb. 2009.
    DOI:    10.1109/ISSCC.2009.4977517
< Selected Articles (主要論文) > 
  1. H. Kitaike, M. Inada, M. Terauchi, H. Tagawa, R. Nagai, S. Xu, R. Zhang, K. Liu, and K. Niitsu, "A 0.9-2.6pW 0.1-0.25V 22nm 2-bit Supply-to-Digital Converter Using Always-Activated Supply-Controlled Oscillator and Supply-Dependent-Activation Buffers for Bio-Fuel-Cell-Powered-and-Sensed Time-Stamped Bio-Recording", IEEE Symposium on VLSI Technology and Circuits (VLSI 2024), pp. 1-2,  Jun.2024.
    DOI:10.1109/VLSITECHNOLOGYANDCIR46783.2024.10631372
  2. S. Imai, H. Homma, K. Takimoto, M. Tanikawa, J. Nakamura, M.Kaneko, Y. Osaki, K. Niitsu, C. Yongzhi, A. A. Fathnan, and H. Wakatsuchi, “Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency”, Scientific Reports,  vol. 13, no. 7202, pp.9, May. 2023.
    DOI:https://doi.org/10.48550/arXiv.2212.12982                     　　　　　　　　　　　　　　　　　　　　　
  3. A. Tanaka, G. Chen, and K. Niitsu, “A 4.5-mW 22-nm CMOS Label-Free Frequency-Shift 3×3×2 3D Biosensor Array Using Vertically-Stacked 60-GHz LC Oscillators”, IEEE Transactions on Circuits and Systems II: Express Briefs (TCAS-II), vol. 69, no. 10, pp. 4078-4082, Oct. 2022.
    DOI:10.1109/TCSII.2022.3185542
  4. G. Chen, Y. Wang, T. M. Quan, N. Matsuyama, T. Tsujimura and K. Niitsu, “ A 0.5 mm2 Solar Cell-Powered Biofuel Cell-Input Biosensing System with LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens”, IEEE Solid-State Circuits Letters (SSC-L), vol. 5, pp. 41–44, Feb. 2022.
    DOI:10.1109/LSSC.2022.3151904
  5. K. Niitsu, T. Nakanishi, S. Murakami, M. Matsunaga, A. Kobayashi, N. M. Karim, J. Ito, N. Ozawa, T. Hase, H. Tanaka, M. Sato, H. Kondo, K. Ishikawa, H. Odaka, Y. Hasegawa, M. Hori, and K. Nakazato, "A 65-nm CMOS Fully Integrated Analysis Platform Using an On-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window for Analyzing Circulating Tumor Cell and Exosome", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol. 13, no. 2 pp.470-479, Apr. 2019.
    DOI:    10.1109/TBCAS.2018.2882472

  6. K. Hayashi, S. Arata, S. Murakami, Y. Nishio, A. Kobayashi, and K. Niitsu, "A 6.1nA Fully-Integrated CMOS Supply-Modulated OOK Transmitter in 55nm DDC CMOS for Glass-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEEE Transactions on Circuits and Systems II (TCAS-II), vol.65, no.10, pp.1360-1364, Oct. 2018. 
    DOI:    10.1109/TCSII.2018.2860636

  7. K. Niitsu, A. Kobayashi, K. Hayashi, Y. Nishio, K. Ikeda, T. Ando, Y. Ogawa, H. Kai, M. Nishizawa, and K. Nakazato, "A Self-Powered Supply-Sensing Biosensor Platform Using Bio Fuel Cell and Low-Voltage, Low-Cost CMOS Supply-Controlled Ring Oscillator with Inductive-Coupling Transmitter for Healthcare IoT", IEEE Transactions on Circuits and Systems I (TCAS-I), vol.65, no.9, pp.2784-2796, Sep. 2018.
    DOI:    10.1109/TCSI.2018.2791516

  8. A. Kobayashi, K. Ikeda, Y. Ogawa, H. Kai, M. Nishizawa, K. Nakazato, and K. Niitsu, "Design and Experimental Verification of 0.19 V 53 μW 65 nm CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter for a Self-Powered Bio-Sensing Using a Biofuel Cell", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.11, no.6, pp.1313-1323, Dec. 2017.
    DOI:1    0.1109/TBCAS.2017.2735447

  9. K. Niitsu, S. Ota, K. Gamo, H. Kondo, M. Hori, and K. Nakazato, "Development of Microelectrode Arrays Using Electroless Plating for CMOS-Based Direct Counting of Bacterial and HeLa Cells", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.9, no.5, pp.607-619, Nov.2015. 
    DOI: 10.1109/TBCAS.2015.2479656

  10. K. Niitsu, M. Sakurai, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, "CMOS Circuits to Measure Timing Jitter Using a Self-Referenced Clock and a Cascaded Time Difference Amplifier with Duty-Cycle Compensation",  IEEE Journal of Solid-State Circuits (JSSC), vol.47, no.11, pp.2701-2710, Nov. 2012.
    DOI:    10.1109/JSSC.2012.2211655

  11. K. Niitsu, N. Harigai, D. Hirabayashi, D. Oki, M. Sakurai, O. Kobayashi, T. J. Yamaguchi, and H. Kobayashi, "A Clock Jitter Reduction Circuit Using Gated Phase Blending Between Self-Delayed Clock Edges", IEEE Symposium on VLSI Circuits (VLSIC 2012), pp.142-143, Jun. 2012.
    DOI:10.1109/VLSIC.2012.6243830

  12. V. V. Kulkarni, M. Muqsith, K. Niitsu, H. Ishikuro and T. Kuroda, "A 750 Mb/s, 12 pJ/b, 6-to-10 GHz CMOS IR-UWB Transmitter With Embedded On-Chip Antenna", IEEE Journal of Solid-State Circuits (JSSC), vol.44, no.2, pp.394-403, Feb. 2009.
    DOI:10.1109/JSSC.2008.2011034

  13. K. Niitsu, Y. Shimazaki, Y. Sugimori, Y. Kohama, K. Kasuga, I. Nonomura, M. Saen, S. Komatsu, K. Osada, N. Irie, T. Hattori, A. Hasegawa, and T. Kuroda, "An Inductive-Coupling Link for 3D Integration of a 90nm CMOS Processor and a 65nm CMOS SRAM", IEEE International Solid-State Circuits Conference (ISSCC 2009), pp.480-481, Feb. 2009.
    DOI:10.1109/ISSCC.2009.4977517

  14. N. Miura, H. Ishikuro, K. Niitsu, T. Sakurai, and T. Kuroda, "A 0.14pJ/bit Inductive-Coupling Transceiver with Digitally-Controlled Precise Pulse Shaping", IEEE Journal of Solid-State Circuits (JSSC), vol.43, no.1, pp.285-291, Jan. 2008.
    DOI:    10.1109/JSSC.2007.914716
< Journal Paper (原著論文) > 
  1. Ruilin Zhang, Haochen Zhang, Xingyu Wang, Ye Ziyang, Kunyang Liu, Shinichi Nishizawa, Kiichi Niitsu, and Hirofumi Shinohara, "De-correlation and De-bias Post-processing Circuits for True Random Number Generator", IEEE Transactions on Circuits and Systems I (TCAS-I),  2024.
    DOI:10.1109/TCSI.2024.3421663
  2. Shiori Imai, Haruki Homma, Kairi Takimoto, Mizuki Tanikawa, Jin Nakamura, Masaya, Kaneko, Yuya Osaki, Kiichi Niitsu, Cheng Yongzhi, Ashif Aminulloh Fathnan,  and Hiroki Wakatsuchi, “Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency”, Scientific Reports,  vol. 13, no. 7202, pp.9, May. 2023.　　　　　　　　　　　　　　　　　　　　　　  DOI: https://doi.org/10.1038/s41598-023-34112-z
  3. Akiyoshi Tanaka, Guowei Chen, and Kiichi Niitsu, “A 4.5-mW 22-nm CMOS Label-Free Frequency-Shift 3×3×2 3D Biosensor Array Using Vertically-Stacked 60-GHz LC Oscillators”, IEEE Transactions on Circuits and Systems II: Express Briefs (TCAS-II), vol. 69, no. 10, pp. 4078-4082, Oct. 2022.
    DOI: https://doi.org/10.1109/TCSII.2022.3185542
  4. Guowei Chen, Xujiaming Chen and Kiichi Niitsu, “Design and Experimental Verification of A 2.1 nW 0.018 mm2 Slope ADC-Based Supply Voltage Monitor for Biofuel-Cell-Powered Supply-Sensing Systems in 180-nm CMOS”, IEICE Transactions on Electronics,  vol. E105.C no.10 pp. 565-570, Mar. 2022.
    DOI: https://doi.org/10.1587/transele.2021CTS0001
  5. Guowei Chen, Yue Wang, Tran Minh Quan, Naofumi Matsuyama, Takuya Tsujimura and Kiichi Niitsu, “A 0.5-mm2 Solar Cell-Powered Biofuel Cell-Input Biosensing System with LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens”, IEEE Solid-State Circuits Letters (SSC-L), vol. 5, pp. 41–44, Feb. 2022.
    DOI: https://doi.org/10.1109/LSSC.2022.3151904
  6. Guowei Chen and Kiichi Niitsu, “A Solar-Cell-Assisted, 99% Biofuel Cell Area Reduced, Biofuel-Cell-Powered Wireless Biosensing System in 65nm CMOS for Continuous Glucose Monitoring Contact Lenses”, IEICE Transactions on Electronics, vol. E105.C, no.7, pp.343-348,  Dec. 2021.
    DOI: https://doi.org/10.1587/transele.2021CDS0002
  7. Md. Zahidul Islam, Anyarat Watthanaphanit, Sangwoo Chae, Kiichi Niitsu, and Nagahiro Saito, “Structure and properties of nanocarbons-encapsulated WC synthesized by solution plasma process in palm oils”, Materials Express, vol. 11, no. 9, pp. 1602-1607(6), Sep. 2021.
    DOI: https://doi.org/10.1166/mex.2021.2034
  8. Md. Zahidul Islam, Anyarat Watthanaphanit, Sangwoo Chae, Kiichi Niitsu, and Nagahiro Saito, “High electrical conductivity and oxidation reduction reaction activity of tungsten carbide/carbon nanocomposite synthesized from palm oil by solution plasma process”, Materials Express, vol. 11, no. 9, pp. 1587-1593(7), Sep. 2021.
    DOI: https://doi.org/10.1166/mex.2021.2035
  9. Shota Jodo, Toshihiro Iwaki, Kosuke Uchiyama, Md. Islam, Kensuke Kataoka, Yuki Hayasaka, Jun Imaoka, Masayoshi Yamamoto, Kiichi Niitsu, "A simple gate driver design for GaN-based switching devices with improved surge voltage and switching loss at 1 MHz operation," Japanese Journal of Applied Physics, vol.60, no. SAAD02, Jan. 2021.
    DOI:https://doi.org/10.35848/1347-4065/abbdc7
  10. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Xu Ge, Naofumi Matsuyama, Shunya Murakami, Atsuki Kobayashi, He Cheng, and Kiichi Niitsu, "Design of an electrical equivalent circuit model of a CMOS-process-compatible glucose fuel cell as a power supply in integrated circuits" Nanoscience and Nanotechnology Letters, vol. 12, no. 5, pp. 642-645 May. 2020. 
    DOI:https://doi.org/10.1166/nnl.2020.3146
  11. Atsuki Kobayashi, and Kiichi Niitsu “Low-Voltage Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS” IEEE Open Journal of Circuits and Systems (OJCAS), vol. 1, pp. 107-114, Jul. 2020.
    DOI:https://doi.org/10.1109/OJCAS.2020.3007393
  12. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi, Yuichi Momoi and Kiichi Niitsu, “Biomedical Application Via Implantable Devices By CMOS-Compatible Glucose Fuel Cells Using Carbon Nano Horn” ECS Transactions (ECST), vol. 97, no. 7, pp. 311, 2020.
    DOI:https://doi.org/10.1149/09707.0311ecst
  13. Ge Xu, Kenya Hayashi, Shigeki Arata, Shunya Murakami, Dang Cong Bui, Atsuki Kobayashi and Kiichi Niitsu, "Design and Theoretical Analysis of Bit Error Rate (BER)-modulated Inductive-coupling Transceiver Using Dynamic Intermediate Interference Control Technique for Low-power Communication" Sensors and Materials, Vol 32, No 8,pp. 2631-2639,Aug. 2020.
    DOI:https://doi.org/10.18494/SAM.2020.2558
  14. Md. Zahidul Islam, Naofumi Matsuyama, Guowei Chen, Atsuki Kobayashi, Yuichi Momoi and Kiichi Niitsu, "A Needle-type complementary metal oxide semiconductor-compatible glucose fuel cell fabricated by carbon nanohorns for biomedical applications", Electrochemistry, vol. 88, no. 4, pp. 333–335, May. 2020.
    DOI:https://doi.org/10.5796/electrochemistry.20-00044
  15. Shunya Murakami, Kenya Hayashi, Shigeki Arata, Ge Xu, Cong Dang Bui, Atsuki Kobayashi, and Kiichi Niitsu, "Design and Verification of Stochastic Oscillator Using Multiple Ring Oscillators and OR-gate for Low-voltage Operation in 65 nm CMOS", Sensors and Materials, vol 32, No 8, pp. 2607-2614,Aug. 2020.
    DOI:https://doi.org/10.18494/SAM.2020.2496
  16. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi, and Kiichi Niitsu, "Open Circuit Voltage and Single Walled Carbon Nanotube (wt%) Dependency in Solid-State Complementary Metal Oxide Semiconductor-Compatible Glucose Fuel Cells" Nanoscience and Nanotechnology Letters (NNL), vol. 12, no. 1, pp. 101–106, Jan 2020.
    DOI:https://doi.org/10.1166/nnl.2020.3085
  17. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi and Kiichi Niitsu "Fabrication of Needle-type Solid-state CMOS-compatible Glucose Fuel Cell Using Carbon Nanotube for Biomedical Application" Sensors and Materials, vol 32, no. 8, pp. 2597-2605, Aug. 2020.
    DOI:https://doi.org/10.18494/SAM.2020.2461
  18. Yuya Nishio, Atsuki Kobayashi and Kiichi Niitsu, "Low-power Inductive-coupling Transmitter Using Supply-insensitive Auxiliary Driving Switch under Supply-voltage Fluctuation" Sensors and Materials, vol 32, no. 8, pp. 2615-2630, Aug. 2020.
    DOI:https://doi.org/10.18494/SAM.2020.2497
  19. Huseyn Ozgur Kazanci and Kiichi Niitsu, "Monte Carlo Simulation Driven Time Resolved Photon Fluence Analysis", Optoelectronics Letters, vol.16, pp.237–240, 2020.
    DOI:https://doi.org/10.1007/s11801-020-9060-y
  20. Atsuki Kobayashi, Kenya Hayashi, Shigeki Arata, Shunya Murakami, Ge Xu, and Kiichi Niitsu, "Design of a Self-Controlled Dual-Oscillator-Based Supply Voltage Monitor for Biofuel-Cell-Combined Biosensing Systems in 65-nm CMOS and 55-nm DDC CMOS", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.13, no.6, pp. 1152-1162, Dec. 2019.
    DOI:https://doi.org/10.1109/TBCAS.2019.2950509
  21. Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Cong Dang Bui, Atsuki Kobayashi, and Kiichi Niitsu, ”A 385×385µm2 0.165V 0.27nW Fully-Integrated Supply-Modulated OOK Transmitter in 65nm CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEICE Trans. Elec, vol. E102.C no. 7 pp.590-594. Jul. 2019.
    DOI:https://doi.org/10.1587/transele.2018CTS0005
  22. Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Cong Dang Bui, Atsuki Kobayashi, and Kiichi Niitsu, ”An FSK Inductive-Coupling Transceiver Using 60mV 0.64fJ/bit 0.0016mm2 Load-Modulated Transmitter and LC-Oscillator-Based Receiver in 65nm CMOS for Energy-Budget-Unbalanced Application", IEICE Trans. Elec, vol. E102.C,  no.7, pp.585-589. Jul. 2019.
    DOI:https://doi.org/10.1587/transele.2018CTS0002
  23. Kiichi Niitsu, Osamu Kobayashi, Takahiro J. Yamaguchi and Haruo Kobayashi ”Design and Theoretical Analysis of a Clock Jitter Reduction Circuit Using Gated Phase Blending Between Self-Delayed Clock Edges", IEICE Electronics Express, vol. 16, no. 13,   pp.20190218 Apr. 2019.
    DOI:https://doi.org/10.1587/elex.16.20190218
  24. Yuya Nishio, Atsuki Kobayashi, and Kiichi Niitsu, ”Design and Calibration of a Small-Footprint, Low-Frequency, and Low-Power Gate Leakage Timer Using Differential Leakage Technique”, IEICE Transactions on Electronics, vol. E102-C, no.4, pp.269-275, Apr. 2019.
    DOI:https://doi.org/10.1587/transele.2018CDP0005
  25. Kiichi Niitsu, Taiki Nakanishi, Shunya Murakami, Maya Matsunaga, Atsuki Kobayashi, Nissar Mohammad Karim, Jun Ito, Naoya Ozawa, Tetsunari Hase, Hiromasa Tanaka, Mitsuo Sato, Hiroki Kondo, Kenji Ishikawa, Hidefumi Odaka, Yoshinori Hasegawa, Masaru Hori, and Kazuo Nakazato, "A 65-nm CMOS Fully Integrated Analysis Platform Using an On-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window for Analyzing Circulating Tumor Cell and Exosome", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol. 13, no. 2 pp.470-479, Apr. 2019.
    DOI:https://doi.org/10.1109/TBCAS.2018.2882472
  26. Maya Matsunaga, Taiki Nakanishi, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Design and analysis of a three-dimensional millimeter-wave frequency-shift based CMOS biosensor using vertically stacked spiral inductors in LC oscillators", Analog Integrated Circuits and Signal Processing (ALOG), vol.98, no.3, pp.453-464, Mar. 2019.
    DOI:https://doi.org/10.1007/s10470-018-1267-5
  27. Shigeki Arata, Kenya Hayashi, Xu Ge, Shunya Min Proc. urakami, Cong Dang Bui, Atsuki Kobayashi, and Kiichi Niitsu, ”Yield and open-circuit-voltage enhancement of 0.36 mm2 Solid-State CMOS-compatible glucose fuel cell by using repeated separator coating”,  Japanese Journal of Applied Physics, vol.58, no. SB, pp. SBBG11, Feb. 2019.
    DOI:https://doi.org/10.7567/1347-4065/aafc9e
  28. Kenya Hayashi, Shigeki Arata, Shunya Murakami, Yuya Nishio, Atsuki Kobayashi, and Kiichi Niitsu, "A 6.1nA Fully-Integrated CMOS Supply-Modulated OOK Transmitter in 55nm DDC CMOS for Glass-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEEE Transactions on Circuits and Systems II (TCAS-II), vol.65, no.10, pp.1360-1364, Oct. 2018.
    DOI:https://doi.org/10.1109/TCSII.2018.2860636
  29. Kichi Niitsu, ”Energy-autonomous biosensing platform using supply-sensing CMOS integrated sensor and biofuel cell for next-generation healthcare Internet of Things", Japanese Journal of Applied Physics. vol.57, no.10, Sep. 2018.
    DOI:https://doi.org/10.7567/JJAP.57.1002A5
  30. Kiichi Niitsu, Atsuki Kobayashi, Kenya Hayashi, Yuya Nishio, Kei Ikeda, Takashi Ando, Yudai Ogawa, Hiroyuki Kai, Matsuhiko Nishizawa, and Kazuo Nakazato, "A Self-Powered Supply-Sensing Biosensor Platform Using Bio Fuel Cell and Low-Voltage, Low-Cost CMOS Supply-Controlled Ring Oscillator with Inductive-Coupling Transmitter for Healthcare IoT", IEEE Transactions on Circuits and Systems I (TCAS-I), vol.65, no.9, pp.2784-2796, Sep. 2018.
    DOI:https://doi.org/10.1109/TCSI.2018.2791516
  31. Shigeki Arata, Kenya Hayashi, Yuya Nishio, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Wafer-scale development and experimental verification of 0.36-mm^2 228-mV open-circuit-voltage solid-state CMOS-compatible glucose fuel cell for healthcare IoT application", Japanese Journal of Applied Physics, vol.57, no.4S, pp.04FM04, Mar. 2018.
    DOI:https://doi.org/10.7567/JJAP.57.04FM04
  32. Maya Matsunaga, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Design Trade-Off between Spatial Resolution and Power Consumption in CMOS Biosensor Circuit Based on Millimeter-Wave LC-Oscillator Array", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC02, Jan. 2018.
    DOI:https://doi.org/10.7567/JJAP.57.03EC02
  33. Taiki Nakanishi, Maya Matsunaga, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "A 40 GHz fully integrated circuit with a vector network analyzer and a coplanar-line-based detection area for circulating tumor cell analysis using 65 nm CMOS technology", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC01, Jan. 2018.
    DOI:https://doi.org/10.7567/JJAP.57.03EC01
  34. Keisuke Itakura, Keisuke Kayano, Kazuo Nakazato and Kiichi Niitsu, "Theoretical analysis and simulation study of low-power CMOS electrochemical impedance spectroscopy biosensor in 55 nm deeply depleted channel technology for cell-state monitoring", Japanese Journal of Applied Physics, vol.57, no.1S, pp.01AG02, Jan. 2018.
    DOI:https://doi.org/10.7567/JJAP.57.01AG02
  35. Atsuki Kobayashi, Kei Ikeda, Yudai Ogawa, Hiroyuki Kai, Matsuhiko Nishizawa, Kazuo Nakazato, and Kiichi Niitsu, "Design and Experimental Verification of a 0.19 V 53 μW 65 nm CMOS Integrated Supply-Sensing Sensor With a Supply-Insensitive Temperature Sensor and an Inductive-Coupling Transmitter for a Self-Powered Bio-sensing System Using a Biofuel Cell", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.11, no.6, pp.1313-1323, Dec. 2017.
    DOI:https://doi.org/10.1109/TBCAS.2017.2735447
  36. Kazuo Nakazato, and Kiichi Niitsu, "Biosensor integrated circuits using CMOS technology",Institute of Electrical Engineers of Japan, vol.137, no.10, pp.291-215, 2017
    DOI:https://doi.org/10.1541/ieejsmas.137.291
  37. Kei Ikeda, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Design and Electrochemical Measurement of a Current-Mode Analog-to-Time Converter with Short-Pulse Output Capability Using Local Intra-Cell Activation for High-Speed Time-Domain Biosensor Array", Analog Integrated Circuits and Signal Processing (ALOG), vol.92, no.3, pp.403-413, Jun. 2017.
    DOI:https://doi.org/10.1007/s10470-017-1003-6
  38. Kohei Gamo, Kazuo Nakazato, and Kiichi Niitsu, "A Current-Integration-Based CMOS Amperometric Sensor with 1024 × 1024 Bacteria-Sized Microelectrode Array for High-Sensitivity Bacteria Counting", IEICE Transactions on Electronics, vol.E100-C, no.6, pp. 602-606, Jun. 2017.
    DOI:https://doi.org/10.1587/transele.E100.C.602
  39. Kei Ikeda, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Design and Analysis of Scalability in Current-Mode Analog-to-Time Converter for an Energy-Efficient and High-Resolution CMOS Biosensor Array", IEICE Transactions on Electronics, vol.E100-C, no.6, pp.597-601, Jun. 2017.
    DOI:https://doi.org/10.1587/transele.E100.C.597
  40. Yuuki Yamaji, Kazuo Nakazato, and Kiichi Niitsu, "Sub-1-V CMOS-Based Electrophoresis Using Electroless Gold Plating for Small-Form-Factor Biomolecule Manipulation", IEICE Transactions on Electronics, vol.E100-C, no.6, pp.592-596, Jun. 2017.
    DOI:https://doi.org/10.1587/transele.E100.C.592
  41. Kiichi Niitsu, Kei Ikeda, Keita Muto, and Kazuo Nakazato, "Design, Experimental Verification, and Analysis of a 1.8-V-Input-range Voltage-to-Current Converter Using Source Degeneration for Low-Noise Multimodal CMOS Biosensor Array", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH06, Jan. 2017.
    DOI:https://doi.org/10.7567/JJAP.56.01AH06
  42. Kiichi Niitsu, Atsuki Kobayashi, Kohei Yoshida, and Kazuo Nakazato, "Design and experimental verification of CMOS magnetic-based microbead detection using an asynchronous intra-chip inductive-coupling transceiver", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH05, Jan. 2017.
    DOI:https://doi.org/10.7567/JJAP.56.01AH05
  43. Kiichi Niitsu, Takashi Ando, and Kazuo Nakazato, "Enhancement in open-circuit voltage of implantable CMOS-compatible glucose fuel cell by improving the anodic catalyst", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH04, Jan. 2017.
    DOI:https://doi.org/10.7567/JJAP.56.01AH04
  44. Atsuki Kobayashi, Kei Ikeda, Kazuo Nakazato, and Kiichi Niitsu, "Energy-efficient and low-voltage design methodology for a supply-sensing CMOS biosensor using biofuel cells for energy-autonomous healthcare applications", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH03, Jan. 2017.
    DOI:https://doi.org/10.7567/JJAP.56.01AH03
  45. Kohei Gamo, Kazuo Nakazato, and Kiichi Niitsu, "Design, theoretical analysis, and experimental verification of a CMOS current integrator with 1.2 × 2.05 µm2 microelectrode array for high-sensitivity bacterial counting", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH01, Jan. 2017.
    DOI:https://doi.org/10.7567/JJAP.56.01AH01
  46. Kiichi Niitsu, Tsuyoshi Kuno, Masayuki Takihi, and Kazuo Nakazato, "Well-Shaped Microelectrode Array Structure for High-Density CMOS Amperometric Electrochemical Sensor Array", IEICE Transactions on Electronics, vol.E99-C, no.6, pp.663-666, Jun. 2016.
    DOI:https://doi.org/10.1587/transele.E99.C.663
  47. Kiichi Niitsu, Kohei Yoshida, and Kazuo Nakazato, "Design and experimental demonstration of low-power CMOS magnetic cell manipulation platform using charge recycling technique", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF13, Feb. 2016.
    DOI:https://doi.org/10.7567/JJAP.55.03DF13
  48. Suiki Tanaka, Kiichi Niitsu, and Kazuo Nakazato, "A low-power inverter-based CMOS level-crossing analog-to-digital converter for low-frequency biosignal sensing", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF10, Feb. 2016.
    DOI:https://doi.org/10.7567/JJAP.55.03DF10
  49. Yuuki Yamaji, Kiichi Niitsu, and Kazuo Nakazato, "Design and Experimental Verification of Low-Voltage Two-Dimensional CMOS Electrophoresis Platform with 32×32 Sample/Hold Cell Array", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF07, Feb. 2016.
    DOI:https://doi.org/10.7567/JJAP.55.03DF07
  50. Kiichi Niitsu, Shoko Ota, Kohei Gamo, Hiroki Kondo, Masaru Hori, and Kazuo Nakazato, "Development of Microelectrode Arrays Using Electroless Plating for CMOS-Based Direct Counting of Bacterial and HeLa Cells", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.9, no.5, pp.607-619, Nov. 2015.
    DOI:https://doi.org/10.1109/TBCAS.2015.2479656
  51. Kiichi Niitsu, Yusuke Osawa, Daiki Hirabayashi, Osamu Kobayashi, Takahiro J. Yamaguchi, and Haruo Kobayashi, "A CMOS PWM Transceiver Using Self-Referenced Edge Detection", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.23, no.6, pp.1145-1149, Jun. 2015.　
    DOI:https://doi.org/10.1109/TVLSI.2014.2321393
  52. Hiroki Ishihara, Kiichi Niitsu, and Kazuo Nakazato, "Analysis and Experimental Verification of DNA Single Base Polymerization Detection Using CMOS FET-Based Redox Potential Sensor Array", Japanese Journal of Applied Physics, vol.54, no.4S, pp.04DL05, Mar. 2015.
    DOI:https://doi.org/10.7567/JJAP.54.04DL05
  53. Yusuke Osawa, Daiki Hirabayashi, Naohiro Harigai, Haruo Kobayashi, Osamu Kobayashi, Masanobu Tsuji, Sadayoshi Umeda, Ryoji Shiota, Noriaki Dobashi, Masafumi Watanabe, Tatsuji Matsuura, Kiichi Niitsu, Isao Shimizu, Nobukazu Takai, and Takahiro J. Yamaguchi, "Phase Noise Measurement and Testing with Delta-Sigma TDC", Key Engineering Materials, vol.643, pp.149-156, May. 2015.
    DOI:https://doi.org/10.4028/www.scientific.net/KEM.643.149
  54. Guanglei Jin, Hao Chen, Chuan Gao, Yunpeng Zhang, Murong Li, Haruo Kobayashi, Shu Wu, Nobukazu Takai, Kiichi Niitsu, and Khayrollah Hadidi, "Digital Auto-Tuning for Center Frequency and Q-Factor of Gm-C Band-Pass Filter", Key Engineering Materials, Advanced Micro-Device Engineering V, vol.643, pp.123-130, May. 2015.
    DOI:https://doi.org/10.4028/www.scientific.net/KEM.643.123
  55. Kiichi Niitsu, Naohiro Harigai, Takahiro J. Yamaguchi, and Haruo Kobayashi, "A Low-Offset Cascaded Time Amplifier with Reconfigurable Inter-Stage Connection", IEICE Electronics Express, vol.11, no.10, pp.20140203, May. 2014.
    DOI:https://doi.org/10.1587/elex.11.20140203
  56. Tsuyoshi Kuno, Kiichi Niitsu, and Kazuo Nakazato, "Amperometric Electrochemical Sensor Array for On-Chip Simultaneous Imaging", Japanese Journal of Applied Physics, vol.53, pp.04EL01, Feb. 2014.
    DOI:https://doi.org/10.7567/JJAP.53.04EL01
  57. Kiichi Niitsu, Kazunori Sakuma, Naohiro Harigai, Daiki Hirabayashi, Nobukazu Takai, Takahiro J. Yamaguchi, and Haruo Kobayashi, "Design Methodology and Jitter Analysis of a Delay Line for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.596, pp.176-180, Jan. 2014.
    DOI:https://doi.org/10.4028/www.scientific.net/KEM.596.176
  58. Kiichi Niitsu, Naohiro Harigai, Daiki Hirabayashi, Masato Sakurai, Takahiro J. Yamaguchi, and Haruo Kobayashi, "Analysis on a Cascaded Structure in Open-Loop Time Amplifier for High-Speed Operation", Key Engineering Materials, vol.596, pp.171-175, Jan. 2014.
    DOI:https://doi.org/10.4028/www.scientific.net/KEM.596.171
  59. Yohei Tan, Daiki Oki, Yu Liu, Yukiko Arai, Zachary Nosker, Haruo Kobayashi, Osamu Kobayashi, Tatsuji Matsuura, Zhixiang Yang, Atsuhiro Katayama, Li Quan, Ensi Li, Kiichi Niitsu, and Nobukazu Takai, "Self-Calibration Techniques of Pipeline ADCs Using Cyclic Configuration", Key Engineering Materials, vol.596, pp.181-186, Jan. 2014.
    DOI:    https://doi.org/10.4028/www.scientific.net/KEM.596.181
  60. Satoshi Uemori, Masamichi Ishii, Haruo Kobayashi, Daiki Hirabayashi, Yuta Arakawa, Yuta Doi, Osamu Kobayashi, Tatsuji Matsuura, Kiichi Niitsu, Yuji Yano, Tatsuhiro Gake, Takahiro J. Yamaguchi, and Nobukazu Takai, “Multi-bit Sigma-Delta TDC Architecture with Improved Linearity”, Journal of Electronic Testing : Theory and Applications, vol.29, no.6, pp.879-892, Dec. 2013.
    DOI:https://doi.org/10.1007/s10836-013-5408-6
  61. Kiichi Niitsu, Naohiro Harigai, and Haruo Kobayashi, "Design Methodology for Determining the Number of Stages in a Cascaded Time Amplifier to Minimize Area Consumption", IEICE Electronics Express, vol.10, no.11, pp.20130289, Jun. 2013.
    DOI:https://doi.org/10.1587/elex.10.20130289
  62. Kiichi Niitsu, Naohiro Harigai, Takahiro J. Yamaguchi, and Haruo Kobayashi, "A Feed-Forward Time Amplifier Using a Phase Detector and Variable Delay Lines", IEICE Transactions on Electronics, vol.E96-C, no.6, pp.920-922, Jun. 2013.
    DOI:https://doi.org/10.1587/transele.E96.C.920
  63. Keisuke Kato, Fumitaka Abe, Kazuyuki Wakabayashi, Chuan Gao, Takafumi Yamada, Haruo Kobayashi, Osamu Kobayashi, and Kiichi Niitsu, "Two-Tone Signal Generation  for ADC Testing", IEICE Transactions on Electronics, vol.E96-C, no.6, pp. 850-858, Jun. 2013.
    DOI:https://doi.org/10.1587/transele.E96.C.850  
  64. Zachary Nosker, Yasunori Kobori, Haruo Kobayashi, Kiichi Niitsu, Nobukazu Takai, Takeshi Oomori, Takahiro Odaguchi, Isao Nakanishi, Kenji Nemoto, Jun-ichi Matsuda, "A Small, Low Power Boost Regulator Optimized for Energy Harvesting Applications", Analog Integrated Circuits and Signal Processing, vol.75, no.2, pp.207-216, Apr. 2013.
    DOI:https://doi.org/10.1007/s10470-012-0017-3
  65. Kiichi Niitsu, Masato Sakurai, Naohiro Harigai, Daiki Hirabayashi, Daiki Oki, Takahiro J. Yamaguchi, and Haruo Kobayashi, "An Analytical Study on Jitter Accumulation in Interleaved Phase Frequency Detectors for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.534, pp.197-205, Jan. 2013.
    DOI:https://doi.org/10.4028/www.scientific.net/KEM.534.197
  66. Zachary Nosker, Yasunori Kobori, Haruo Kobayashi, Kiichi Niitsu, Nobukazu Takai, Takeshi Oomori, Takahiro Odaguchi, Isao Nakanishi, Kenji Nemoto, Jun-ichi Matsuda, "A High Efficiency, Extended Load Range Boost Regulator Optimized for Energy Harvesting Applications", Key Engineering Materials, vol.534, pp.206-219, Jan. 2013.
    DOI:https://doi.org/10.4028/www.scientific.net/KEM.534.206
  67. Kiichi Niitsu, Masato Sakurai, Naohiro Harigai, Takahiro J. Yamaguchi, and Haruo Kobayashi, "CMOS Circuits to Measure Timing Jitter Using a Self-Referenced Clock and a Cascaded Time Difference Amplifier with Duty-Cycle Compensation", IEEE Journal of Solid-State Circuits (JSSC), vol.47, no.11, pp.2701-2710, Nov. 2012.
    DOI:https://doi.org/10.1109/JSSC.2012.2211655
  68. Kazuyuki Wakabayashi, Keisuke Kato, Takafumi Yamada, Osamu Kobayashi, Haruo Kobayashi, Fumitaka Abe, and Kiichi Niitsu, "Low-Distortion Sinewave Generation Method Using Arbitrary Waveform Generator", Journal of Electronic Testing: Theory and Applications, vol.28, no.5, pp.641-651, Oct. 2012.
    DOI:https://doi.org/10.1007/s10836-012-5293-4
  69. Kiichi Niitsu, Shusuke Kawai, Noriyuki Miura, Hiroki Ishikuro, and Tadahiro Kuroda, "A 65fJ/b Inter-Chip Inductive-Coupling Data Transceivers Using Charge-Recycling Technique for Low-Power Inter-Chip Communication in 3-D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.20, no.7, pp.1285-1294, Jul. 2012. 
    DOI:https://doi.org/10.1109/TVLSI.2011.2150252
  70. Jiani Ye, Zachary Nosker, Kazuyuki Wakabayashi, Takuya Yagi,Osamu Yamamoto, Nobukazu Takai, Kiichi Niitsu, Keisuke Kato, Takao Ootsuki, Isao Akiyama, and Haruo Kobayashi, "Architecture of High-Efficiency Digitally-Controlled Class-E Power Amplifier", Key Engineering Materials, vol.487, pp.285-295, Dec. 2011.
    DOI:https://doi.org/10.4028/www.scientific.net/KEM.497.273
  71. Kiichi Niitsu, Shinmo Kang, Vishal V. Kulkarni, Hiroki Ishikuro, and Tadahiro Kuroda, "A 14-GHz AC-Coupled Clock Distribution Scheme With Phase Averaging Technique Using Single LC-VCO and Distributed Phase Interpolators", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.11, pp.2058-2066, Nov. 2011.
    DOI:https://doi.org/10.1109/TVLSI.2010.2072794
  72. Kiichi Niitsu, Yasufumi Sugimori, Yoshinori Kohama, Kenichi Osada, Naohiko Irie, Hiroki Ishikuro, and Tadahiro Kuroda, "Analysis and Techniques for Mitigating Interference from Power/Signal Lines and to SRAM Circuits in CMOS Inductive-Coupling Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.10, pp.1902-1907, Oct. 2011.
    DOI:https://doi.org/10.1109/TVLSI.2010.2056711
  73. Tomohiko Ogawa, Haruo Kobayashi, Satoshi Uemori, Yohei Tan, Satoshi Ito, Nobukazu Takai, Takahiro J. Yamaguchi, and Kiichi Niitsu, "Design for Testability That Reduces Linearity Testing Time of SAR ADCs”, IEICE Transactions on Electronics, vol. E94-C, no.6, pp.1061-1064, Jun. 2011.
    DOI:http://dx.doi.org/10.1587/transele.E94.C.1061
  74. Kiichi Niitsu, Yoshinori Kohama, Yasufumi Sugimori, Kazutaka Kasuga, Kenichi Osada, Naohiko Irie, Hiroki Ishikuro, and Tadahiro Kuroda, "Modeling and Experimental Verification of Misalignment Tolerance in Inductive-Coupling Inter-Chip Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol. 18, no. 8, pp.1238-1243, Aug. 2010.
    DOI:https://doi.org/10.1109/TVLSI.2009.2020724
  75. Makoto Saen, Kenichi Osada, Yasuyuki Okuma, Kiichi Niitsu, Yasuhisa Shimazaki, Yasufumi Sugimori, Yoshinori Kohama, Kazutaka Kasuga, Itaru Nonomura, Naohiko Irie, Toshihiro Hattori, Atsushi Hasegawa, and Tadahiro Kuroda, "3-D System Integration of Processor and Multi-Stacked SRAMs Using Inductive-Coupling Link", IEEE Journal of Solid-State Circuits (JSSC), vol.45, no.4, pp.856-862, Apr. 2010.
    DOI:https://doi.org/10.1109/JSSC.2010.2040310
  76. Kiichi Niitsu, Yuan Yuxiang, Hiroki Ishikuro, and Tadahiro Kuroda, "A 33% Improvement in Efficiency of Wireless Inter-Chip Power Delivery by Thin Film Magnetic Material for Three-Dimensional System Integration", Japanese Journal of Applied Physics, vol.48, pp.04C073, Apr. 2009.
    DOI:https://doi.org/10.1143/JJAP.48.04C073
  77. Vishal V. Kulkarni, Muhammad Muqsith, Kiichi Niitsu, Hiroki Ishikuro and Tadahiro Kuroda, "A 750 Mb/s, 12 pJ/b, 6-to-10 GHz CMOS IR-UWB Transmitter With Embedded On-Chip Antenna", IEEE Journal of Solid-State Circuits (JSSC), vol.44, no.2, pp.394-403, Feb. 2009.
    DOI:https://doi.org/10.1109/JSSC.2008.2011034
  78. Noriyuki Miura, Hiroki Ishikuro, Kiichi Niitsu, Takayasu Sakurai, and Tadahiro Kuroda, "A 0.14pJ/bit Inductive-Coupling Transceiver with Digitally-Controlled Precise Pulse Shaping", IEEE Journal of Solid-State Circuits (JSSC), vol.43, no.1, pp.285-291, Jan. 2008.
    DOI:https://doi.org/10.1109/JSSC.2007.914716
  79. Kiichi Niitsu, Noriyuki Miura, Mari Inoue, Yoshihiro Nakagawa, Masamoto Tago, Masayuki Mizuno, Takayasu Sakurai, and Tadahiro Kuroda, "Daisy Chain Transmitter for Power Reduction in Inductive-Coupling CMOS Link”, IEICE Transactions on Electronics, vol.E90-C, no.4, pp.829-835, Apr. 2007.
    DOI:https://doi.org/10.1093/ietele/e90-c.4.829
  80. Kiichi Niitsu, Noriyuki Miura, Mari Inoue, Yoshihiro Nakagawa, Masamoto Tago, Masayuki Mizuno, Hiroki Ishikuro, and Tadahiro Kuroda, "60% Power Reduction in Inductive-Coupling Inter-Chip Link by Current-Sensing Technique", Japanese Journal of Applied Physics, vol.46, no.4B, pp.2215-2219, Apr. 2007.
    DOI:https://doi.org/10.1143/JJAP.46.2215
  81. Noriyuki Miura, Daisuke Mizoguchi, Mari Inoue, Kiichi Niitsu, Yoshihiro Nakagawa, Masamoto Tago, Masayuki Mizuno, Takayasu Sakurai, and Tadahiro Kuroda, "A 1Tb/s 3W Inductive-Coupling Transceiver for 3D-Stacked Inter-Chip Clock and Data Link", IEEE Journal of Solid-State Circuits (JSSC), vol.42, no.1, pp.111-122, Jan. 2007.
    DOI:https://doi.org/10.1109/JSSC.2006.886554

 

            (IEEE format) 
  1. R Zhang, H Zhang, X Wang, Y Ziyang, K Liu, S Nishizawa, K Niitsu, and H Shinohara, "De-correlation and De-bias Post-processing Circuits for True Random Number Generator", IEEE Transactions on Circuits and Systems I (TCAS-I),  2024.
  2. S. Imai, H. Homma, K. Takimoto, M. Tanikawa, J. Nakamura, M.Kaneko, Y. Osaki, K. Niitsu, C. Yongzhi, A. A. Fathnan, and H. Wakatsuchi, “Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency”, Scientific Reports,  vol. 13, no. 7202, pp.9, May. 2023.
  3. A. Tanaka, G. Chen, and K. Niitsu, “A 4.5-mW 22-nm CMOS Label-Free Frequency-Shift 3×3×2 3D Biosensor Array Using Vertically-Stacked 60-GHz LC Oscillators”, IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 69, no. 10, pp. 4078-4082, Oct. 2022.
  4. G. Chen, X. Chen and K. Niitsu, “Design and Experimental Verification of A 2.1 nW 0.018 mm2 Slope ADC-Based Supply Voltage Monitor for Biofuel-Cell-Powered Supply-Sensing Systems in 180-nm CMOS”, IEICE Transactions on Electronics,  vol. E105.C no.10 Pages 565-570, Mar. 2022.
  5. G. Chen, Y. Wang, T. M. Quan, N. Matsuyama, T. Tsujimura and K. Niitsu, “ A 0.5 mm2 Solar Cell-Powered Biofuel Cell-Input Biosensing System with LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens”, IEEE Solid-State Circuits Letters, vol. 5, pp. 41–44, Feb. 2022.
  6. G. Chen and K. Niitsu, “A Solar-Cell-Assisted, 99% Biofuel Cell Area Reduced, Biofuel-Cell-Powered Wireless Biosensing System in 65nm CMOS for Continuous Glucose Monitoring Contact Lenses”, IEICE Transactions on Electronics, vol. E105.C, no.7, pp.343-348, Dec. 2021.
  7. M. Z. Islam, A. Watthanaphanit, S. Chae, K. Niitsu and N. Saito, “Structure and properties of nanocarbons-encapsulated WC synthesized by solution plasma process in palm oils”, Materials Express, vol. 11, no. 9, pp. 1602-1607(6), Sep. 2021.
  8. M. Z. Islam, A. Watthanaphanit, S. Chae, K. Niitsu and N. Saito, “High electrical conductivity and oxidation reduction reaction activity of tungsten carbide/carbon nanocomposite synthesized from palm oil by solution plasma process”, Materials Express, vol. 11, no. 9, pp. 1587-1593(7), Sep. 2021.
  9. S. Jodo, T. Iwaki, K. Uchiyama, M. Islam, K. Kataoka, Y. Hayasaka, J. Imaoka, M. Yamamoto, K. Niitsu, "A simple gate driver design for GaN-based switching devices with improved surge voltage and switching loss at 1 MHz operation", Japanese Journal of Applied Physics, vol.60, no. SAAD02, Jan. 2021.
  10. M. Z. Islam, S. Arata, K. Hayashi, X. Ge, N. Matsuyama, S. Murakami, A. Kobayashi, H. Cheng, and K. Niitsu, "Design of an electrical equivalent circuit model of a CMOS-process-compatible glucose fuel cell as a power supply in integrated circuits" Nanoscience and Nanotechnology Letters, vol. 12, no. 5, pp. 642-645 May. 2020.
  11. A. Kobayashi, and K. Niitsu "Low-Voltage Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS," IEEE Open Journal of Circuits and Systems, vol. 1, pp. 107-114, 2020.
  12. M. Z. Islam, S. Arata, K. Hayashi, A. Kobayashi, Y. Momoi and K. Niitsu, “Biomedical Application Via Implantable Devices By CMOS-Compatible Glucose Fuel Cells Using Carbon Nano Horn” ECS Transactions (ECST), vol. 97, no. 7, pp. 311, 2020.
  13. G. Xu, K. Hayashi, S. Arata, S. Murakami, D. C. Bui, A. Kobayashi and K. Niitsu, "Design and Theoretical Analysis of A BER-Modulated Inductive-Coupling Transceiver Using Dynamic Intermediate InterferenceControl Technique for Low-Power Communication" Sensors and Materials, MYU Tokyo, 2020.
  14. M. Z. Islam, N. Matsuyama, G. Chen, A. Kobayashi, Y. Momoi and K. Niitsu, "A Needle-type complementary metal oxide semiconductor-compatible glucose fuel cell fabricated by carbon nanohorns for biomedical applications", Electrochemistry, May. 2020.
  15. S. Murakami, K. Hayashi, S. Arata, G. Xu, C. D. Bui, A. Kobayashi, and K. Niitsu, "Design and Verification of a Stochastic Oscillator Using Multiple Ring Oscillators and OR Gate for Low Voltage Operation in 65 nm CMOS", Sensors and Materials, MYU Tokyo, 2020.
  16. M. Z. Islam, S. Arata, K. Hayashi, A. Kobayashi, and K. Niitsu, "Open circuit voltage and single walled carbon nanotube (wt.%) dependency in solid-state CMOS-compatible glucose fuel cells" Nanoscience and Nanotechnology Letters(NNL),vol. 12, no. 1, pp. 101–106, Jan 2020.
  17. M. Z. Islam, S. Arata, K. Hayashi, A. Kobayashi and K. Niitsu "Fabrication of needle type solid-state CMOS compatible glucosefuel cell by CNT material for biomedical application" Sensors and Materials, MYU Tokyo, 2020.
  18. Y. Nishio, A. Kobayashi and K. Niitsu, "A Low-Power Inductive-Coupling Transmitter Using Supply-Insensitive Auxiliary Driving Under Supply-Voltage Fluctuation" Sensors and Materials, MYU Tokyo, 2020.
  19. H. O. Kazanci, K. Niitsu, "Monte Carlo Simulation Driven Time Resolved Photon Fluence Analysis", Optoelectronics Letters, vol.16, pp.237–240, 2020.
  20. A. Kobayashi, K. Hayashi, S. Arata, S. Murakami, G. Xu, and K. Niitsu, "Design of a Self-Controlled Dual-Oscillator-Based Supply Voltage Monitor for Biofuel-Cell-Combined Biosensing Systems in 65-nm CMOS and 55-nm DDC CMOS", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.13, no.6, pp. 1152-1162, Dec. 2019.
  21. K. Hayashi, S. Arata, G. Xu, S. Murakami, C. D. Bui, A. Kobayashi, and K. Niitsu, ”A 385×385µm2 0.165V 0.27nW Fully-Integrated Supply-Modulated OOK Transmitter in 65nm CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEICE Trans. Elec, vol. E102.C no. 7 pp.590-594. Jul. 2019.
  22. K. Hayashi, S. Arata, G. Xu, S. Murakami, C. D. Bui, A. Kobayashi, and K. Niitsu, ”An FSK Inductive-Coupling Transceiver Using 60mV 0.64fJ/bit 0.0016mm2 Load-Modulated Transmitter and LC-Oscillator-Based Receiver in 65nm CMOS for Energy-Budget-Unbalanced Application", IEICE Trans. Elec, vol. E102.C,  no.7, pp.585-589. Jul. 2019.
  23. K. Niitsu, O. Kobayashi, T. J. Yamaguchi and H. Kobayashi, ”Design and Theoretical Analysis of a Clock Jitter Reduction Circuit Using Gated Phase Blending Between Self-Delayed Clock Edges", IEICE Electronics Express, vol. 16, no. 13,     pp.20190218 Apr. 2019.

  24. Y. Nishio, A. Kobayashi, and K. Niitsu, ”Design and Calibration of a Small-Footprint, Low-Frequency, and Low-Power Gate Leakage Timer Using Differential Leakage Technique”, IEICE Transactions on Electronics, vol. E102-C, no.4, pp.269-275, Apr. 2019.

  25. K. Niitsu, T. Nakanishi, S. Murakami, M. Matsunaga, A. Kobayashi, N. M. Karim, J. Ito, N. Ozawa, T. Hase, H. Tanaka, M. Sato, H. Kondo, K. Ishikawa, H. Odaka, Y. Hasegawa, M. Hori, and K. Nakazato, "A 65-nm CMOS Fully Integrated Analysis Platform Using an On-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window for Analyzing Circulating Tumor Cell and Exosome", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol. 13, no. 2 pp.470-479, Apr. 2019.

  26. M. Matsunaga, T. Nakanishi, A. Kobayashi, K. Nakazato, and K. Niitsu, "Design and analysis of a three-dimensional millimeter-wave frequency-shift based CMOS biosensor using vertically stacked spiral inductors in LC oscillators", Analog Integrated Circuits and Signal Processing (ALOG), vol.98, no.3, pp.453-464, Mar. 2019.
  27. S. Arata, K. Hayashi, X. Ge, S. Murakami, C. D. Bui, A. Kobayashi, and K. Niitsu, ”Yield and open-circuit-voltage enhancement of 0.36 mm2 Solid-State CMOS-compatible glucose fuel cell by using repeated separator coating”,  Japanese Journal of Applied Physics, vol.58, no. SB, pp. SBBG11, Feb. 2019.
  28. K. Niitsu, ”An Energy-Autonomous Biosensing Platform Using Supply-Sensing CMOS Integrated Sensor and Bio Fuel Cell for Next-Generation Healthcare IoT", Japanese Journal of Applied Physics. vol.57, no.10, Sep. 2018.

  29. K. Hayashi, S. Arata, S. Murakami, Y. Nishio, A. Kobayashi, and K. Niitsu, "A 6.1nA Fully-Integrated CMOS Supply-Modulated OOK Transmitter in 55nm DDC CMOS for Glass-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEEE Transactions on Circuits and Systems II (TCAS-II), vol.65, no.10, pp.1360-1364, Oct. 2018. 

  30. K. Niitsu, A. Kobayashi, K. Hayashi, Y. Nishio, K. Ikeda, T. Ando, Y. Ogawa, H. Kai, M. Nishizawa, and K. Nakazato, "A Self-Powered Supply-Sensing Biosensor Platform Using Bio Fuel Cell and Low-Voltage, Low-Cost CMOS Supply-Controlled Ring Oscillator with Inductive-Coupling Transmitter for Healthcare IoT", IEEE Transactions on Circuits and Systems I (TCAS-I), vol.65, no.9, pp.2784-2796, Sep. 2018.

  31. S. Arata, K. Hayashi, Y. Nishio, A. Kobayashi, K. Nakazato, and K. Niitsu, "Wafer-scale development and experimental verification of 0.36-mm² 228-mV open-circuit-voltage solid-state CMOS-compatible glucose fuel cell for healthcare IoT application", Japanese Journal of Applied Physics, vol.57, no.4S, pp.04FM04, Mar. 2018. 

  32. M. Matsunaga, A. Kobayashi, K. Nakazato, and K. Niitsu, "Design Trade-Off between Spatial Resolution and Power Consumption in CMOS Biosensor Circuit Based on Millimeter-Wave LC-Oscillator Array", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC02, Jan. 2018. 

  33. T. Nakanishi, M. Matsunaga, A. Kobayashi, K. Nakazato, and K. Niitsu, "A 40-GHz fully integrated circulating tumor cell analysis vector network analyzer in 65-nm CMOS technology with coplanar-line-based detection area", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC01, Jan. 2018. 

  34. K. Itakura, K. Kayano, K. Nakazato and K. Niitsu, "Theoretical Analysis and Simulation Study of Low-Power CMOS Electrochemical Impedance Spectroscopy Biosensor in 55nm DDC Technology for Cell-State Monitoring", Japanese Journal of Applied Physics, vol.57, no.1S, pp.01AG02, Jan. 2018. 

  35. A. Kobayashi, K. Ikeda, Y. Ogawa, H. Kai, M. Nishizawa, K. Nakazato, and K. Niitsu, "Design and Experimental Verification of 0.19 V 53 μW 65 nm CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter for a Self-Powered Bio-Sensing Using a Biofuel Cell", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.11, no.6, pp.1313-1323, Dec. 2017.

  36. K. Ikeda, A. Kobayashi, K. Nakazato, and K. Niitsu, "Design and Electrochemical Measurement of a Current-Mode Analog-to-Time Converter with Short-Pulse Output Capability Using Local Intra-Cell Activation for High-Speed Time-Domain Biosensor Array", Analog Integrated Circuits and Signal Processing (ALOG), vol.92, no.3, pp.403-413, Jun. 2017.

  37. K. Gamo, K. Nakazato, and K. Niitsu, "A Current-Integration-Based CMOS Amperometric Sensor with 1024 × 1024 Bacteria-Sized Microelectrode Array for High-Sensitivity Bacteria Counting", IEICE Transactions on Electronics, Vol.E100-C, No.6, pp.602-606, Jun. 2017. 

  38. K. Nakazato, and K. Niitsu, "Biosensor integrated circuits using CMOS technology",Institute of Electrical Engineers of Japan,vol.137, no.10, pp.291-215, 2017.

  39. K. Ikeda, A. Kobayashi, K. Nakazato, and K. Niitsu, "Design and Analysis of Scalability in Current-Mode Analog-to-Time Converter for an Energy-Efficient and High-Resolution CMOS Biosensor Array", IEICE Transactions on Electronics, vol.E100-C, No.6, pp.597-601, Jun. 2017. 

  40. Y. Yamaji, K. Nakazato, and K. Niitsu, "Sub-1-V CMOS-Based Electrophoresis Using Electroless Gold Plating for Small-Form-Factor Biomolecule Manipulation", IEICE Transactions on Electronics, vol.E100-C, No.6, pp.592-596, Jun. 2017.

  41. K. Niitsu, K. Ikeda, K. Muto, and K. Nakazato, "Design, Experimental Verification, and Analysis of a 1.8-V-Input-range Voltage-to-Current Converter Using Source Degeneration for Low-Noise Multimodal CMOS Biosensor Array", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH06, Jan. 2017.

  42. K. Niitsu, A. Kobayashi, K. Yoshida, and K. Nakazato, "Design and experimental verification of CMOS Magnetic-Based Microbeads Detection Using an Asynchronous Intra-chip Inductive-Coupling Transceiver", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH05, Jan. 2017.

  43. K. Niitsu, T. Ando, and K. Nakazato, "Enhancement in open-circuit voltage of implantable CMOS-compatible glucose fuel cell by improving the anodic catalyst", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH04, Jan. 2017.

  44. A. Kobayashi, K. Ikeda, K. Nakazato, and K. Niitsu, "Energy-efficient and low-voltage design methodology for a supply-sensing CMOS biosensor using biofuel cells for energy-autonomous healthcare applications", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH03, Jan. 2017.

  45. K. Gamo, K. Nakazato, and K. Niitsu, "Design, theoretical analysis, and experimental verification of a CMOS current integrator with 1.2 × 2.05 µm2 microelectrode array for high-sensitivity bacterial counting", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH01, Jan. 2017.

  46. K. Niitsu, T. Kuno, M. Takihi, and K. Nakazato, "Well-Shaped Microelectrode Array Structure for High-Density CMOS Amperometric Electrochemical Sensor Array", IEICE Transactions on Electronics, vol.E99-C, no.6, pp.663-666, Jun. 2016.

  47. K. Niitsu, K. Yoshida, and K. Nakazato, "Design and experimental demonstration of low-power CMOS magnetic cell manipulation platform using charge recycling technique", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF13 (4 pages), Feb. 2016. 

  48. S. Tanaka, K. Niitsu, and K. Nakazato, "A Low-Power Inverter-Based CMOS Level-Crossing A/D Converter for Low-frequency Biosignal Sensing", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF10 (7 pages), Feb. 2016.

  49. Y. Yamaji, K. Niitsu, and K. Nakazato, "Design and Experimental Verification of Low-Voltage Two-Dimensional CMOS Electrophoresis Platform with 32×32 Sample/Hold Cell Array", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF07 (5 pages), Feb. 2016.

  50. K. Niitsu, S. Ota, K. Gamo, H. Kondo, M. Hori, and K. Nakazato, "Development of Microelectrode Arrays Using Electroless Plating for CMOS-Based Direct Counting of Bacterial and HeLa Cells," in IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), Nov.2015.
    DOI:     10.1109/TBCAS.2015.2479656

  51. K. Niitsu, Y. Osawa, D. Hirabayashi, O. Kobayashi, T. J. Yamaguchi, and H. Kobayashi, "A CMOS PWM Transceiver Using Self-Referenced Edge Detection," in IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), Jun.2015. 
    DOI:     10.1109/TVLSI.2014.2321393

  52. H. Ishihara, K. Niitsu, and K. Nakazato, "Analysis and Experimental Verification of DNA Single Base Polymerization Detection Using CMOS FET-Based Redox Potential Sensor Array," Japanese Journal of Applied Physics, Mar.2015.
    DOI:10.7567/JJAP.54.04DL05

  53. Y. Osawa, D. Hirabayashi, N. Harigai, H. Kobayashi, O. Kobayashi, M. Tsuji, S. Umeda, R. Shiota, N. Dobashi, M. Watanabe, T. Matsuura, K. Niitsu, I. Shimizu, N. Takai, and T. J. Yamaguchi, "Phase Noise Measurement and Testing with Delta-Sigma TDC," Key Engineering Materials, May.2015.
    DOI: https://doi.org/10.4028/www.scientific.net/KEM.643.149

  54. G. Jin, H. Chen, C. Gao, Y. Zhang, M. Li, H. Kobayashi, S. Wu, N. Takai, K. Niitsu, and K.Hadidi, "Digital Auto-Tuning for Center Frequency and Q-Factor of Gm-C Band-Pass Filter," Key Engineering Materials, vol.Advanced Micro-Device Engineering V, May.2015.
    DOI: https://doi.org/10.4028/www.scientific.net/KEM.643.123

  55. K. Niitsu, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, "A Low-Offset Cascaded Time Amplifier with Reconfigurable Inter-Stage Connection", IEICE Electronics Express, vol.11, no.10, pp.20140203, May. 2014.

  56. T. Kuno, K. Niitsu, and K. Nakazato, "Amperometric Electrochemical Sensor Array for On-Chip Simultaneous Imaging", Japanese Journal of Applied Physics, vol.53, pp.04EL01 (7 pages), Feb. 2014.

  57. K. Niitsu, K. Sakuma, N. Harigai, D. Hirabayashi, N. Takai, T. J. Yamaguchi, and H. Kobayashi, "Design Methodology and Jitter Analysis of a Delay Line for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.596, pp.176-180, Jan. 2014.

  58. K. Niitsu, N. Harigai, D. Hirabayashi, M. Sakurai, T. J. Yamaguchi, and H. Kobayashi, "Analysis on a Cascaded Structure in Open-Loop Time Amplifier for High-Speed Operation", Key Engineering Materials, vol.596, pp.171-175, Jan. 2014.

  59. Y. Tan, D. Oki, Y. Liu, Y. Arai, Z. Nosker, H. Kobayashi, O. Kobayashi, T. Matsuura, Z. Yang, A. Katayama, L. Quan, E. Li, K. Niitsu, and N. Takai, "Self-Calibration Techniques of Pipeline ADCs Using Cyclic Configuration", Key Engineering Materials, vol.596, pp.181-186, Jan. 2014.

  60. S. Uemori, M. Ishii, H. Kobayashi, D. Hirabayashi, Y. Arakawa, Y. Doi, O. Kobayashi, T. Matsuura, K. Niitsu, Y. Yano, T. Gake, T. J. Yamaguchi, and N. Takai, “Multi-bit Sigma-Delta TDC Architecture with Improved Linearity”, Journal of Electronic Testing : Theory and Applications, vol.29, no.6, pp.879-892, Dec. 2013.

  61. K. Niitsu, N. Harigai, and H. Kobayashi, "Design Methodology for Determining the Number of Stages in a Cascaded Time Amplifier to Minimize Area Consumption", IEICE Electronics Express, vol.10, no.11, pp.20130289, Jun. 2013.

  62. K. Niitsu, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, "A Feed-Forward Time Amplifier Using Phase Detector and Variable Delay Line", IEICE Transactions on Electronics, vol.E96-C, no.6, pp.920-922, Jun. 2013.

  63. K. Kato, F. Abe, K. Wakabayashi, C. Gao, T. Yamada, H. Kobayashi, O. Kobayashi, and K. Niitsu, "Two-Tone Signal Generation  for ADC Testing", IEICE Transactions on Electronics, vol.E96-C, no.6, pp.850-858, Jun. 2013.

  64. Z. Nosker, Y. Kobori, H. Kobayashi, K. Niitsu, N.Takai, T.Oomori, T.Odaguchi, I.Nakanishi, K.Nemoto, J.Matsuda, "A Small, Low Power Boost Regulator Optimized for Energy Harvesting Applications", Analog Integrated Circuits and Signal Processing, vol.75, no.2, pp.207-216, Apr. 2013.

  65. K. Niitsu, M. Sakurai, N. Harigai, D. Hirabayashi, D. Oki, T. J. Yamaguchi, and H. Kobayashi, "An Analytical Study on Jitter Accumulation in Interleaved Phase Frequency Detectors for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.534, pp.197-205, Jan. 2013.

  66. Z. Nosker, Y. Kobori, H. Kobayashi, K. Niitsu, N. Takai, T. Oomori, T. Odaguchi, I. Nakanishi, K. Nemoto, J. Matsuda, "A High Efficiency, Extended Load Range Boost Regulator Optimized for Energy Harvesting Applications", Key Engineering Materials, vol.534, pp.206-219, Jan. 2013.

  67. K. Niitsu, M. Sakurai, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, "CMOS Circuits to Measure Timing Jitter Using a Self-Referenced Clock and a Cascaded Time Difference Amplifier with Duty-Cycle Compensation",  IEEE Journal of Solid-State Circuits (JSSC), vol.47, no.11, pp.2701-2710, Nov. 2012.

  68. K. Wakabayashi, K. Kato, T. Yamada, O. Kobayashi, H. Kobayashi, F. Abe, and K. Niitsu, "Low-Distortion Sinewave Generation Method Using Arbitrary Waveform Generator", Journal of Electronic Testing: Theory and Applications, vol.28, no.5, pp.641-651, Oct. 2012.

  69. K. Niitsu, S. Kawai, N. Miura, H. Ishikuro, and T. Kuroda, "A 65fJ/b Inter-Chip Inductive-Coupling Data Transceivers Using Charge-Recycling Technique for Low-Power Inter-Chip Communication in 3-D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.20, no.7, pp.1285-1294, Jul. 2012.

  70. J. Ye, Z. Nosker, K. Wakabayashi, T. Yagi, O. Yamamoto, N. Takai, K. Niitsu, K. Kato, T. Ootsuki, I. Akiyama, and H. Kobayashi, "Architecture of High-Efficiency Digitally-Controlled Class-E Power Amplifier", Key Engineering Materials, vol.487, pp.285-295, Dec. 2011.

  71. K. Niitsu, S. Kang, V. V. Kulkarni, H. Ishikuro, and T. Kuroda, "A 14 GHz AC-Coupled Clock Distribution Scheme with Phase Averaging Technique Using Sigle LC-VCO and Distributed Phase Interpolators", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.11, pp.2058-2066, Nov. 2011.

  72. K. Niitsu, Y. Sugimori, Y. Kohama, K. Osada, N. Irie, H. Ishikuro, and T. Kuroda, "Analysis and Techniques for Mitigating Interference from Power/Signal Lines and to SRAM Circuits in CMOS Inductive-Coupling Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.10, pp.1902-1907, Oct. 2011.

  73. T. Ogawa, H. Kobayashi, S. Uemori, Y. Tan, S. Ito, N. Takai, T. J. Yamaguchi, and K. Niitsu, "Design for Testability That Reduces Linearity Testing Time of SAR ADCs”, IEICE Transactions on Electronics, vol.E94-C, no.6, pp.1061-1064, Jun. 2011.

  74. K. Niitsu, Y. Kohama, Y. Sugimori, K. Kasuga, K. Osada, N. Irie, H. Ishikuro, and T. Kuroda, "Modeling and Experimental Verification of Misalignment Tolerance in Inductive-Coupling Inter-Chip Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.18, no.8, pp.1238-1243, Aug. 2010.

  75. M. Saen, K. Osada, Y. Okuma, K. Niitsu, Y. Shimazaki, Y. Sugimori, Y. Kohama, K. Kasuga, I. Nonomura, N. Irie, T. Hattori, A. Hasegawa, and T. Kuroda, "3-D System Integration of Processor and Multi-Stacked SRAMs Using Inductive-Coupling Link", IEEE Journal of Solid-State Circuits (JSSC), vol.45, no.4, pp.856-862, Apr. 2010.

  76. K. Niitsu, Y. Yuxiang, H. Ishikuro, and T. Kuroda, "A 33% Improvement in Efficiency of Wireless Inter-Chip Power Delivery by Thin Film Magnetic Material for Three-Dimensional System Integration", Japanese Journal of Applied Physics, vol.48, pp.04C073 (5 pages), Apr. 2009.

  77. V. V. Kulkarni, M. Muqsith, K. Niitsu, H. Ishikuro and T. Kuroda, "A 750 Mb/s, 12 pJ/b, 6-to-10 GHz CMOS IR-UWB Transmitter With Embedded On-Chip Antenna", IEEE Journal of Solid-State Circuits (JSSC), vol.44, no.2, pp.394-403, Feb. 2009.

  78. N. Miura, H. Ishikuro, K. Niitsu, T. Sakurai, and T. Kuroda, "A 0.14pJ/bit Inductive-Coupling Transceiver with Digitally-Controlled Precise Pulse Shaping", IEEE Journal of Solid-State Circuits (JSSC), vol.43, no.1, pp.285-291, Jan. 2008.

  79. K. Niitsu, N. Miura, M. Inoue, Y. Nakagawa, M. Tago, M. Mizuno, T. Sakurai, and T. Kuroda, "Daisy Chain Transmitter for Power Reduction in Inductive-Coupling CMOS Link”, IEICE Transactions on Electronics, vol.E90-C, no.4, pp.829-835, Apr. 2007.

  80. K. Niitsu, N. Miura, M. Inoue, Y. Nakagawa, M. Tago, M. Mizuno, H. Ishikuro, and T. Kuroda, "60% Power Reduction in Inductive-Coupling Inter-Chip Link by Current-Sensing Technique", Japanese Journal of Applied Physics, vol.46, no.4B, pp.2215-2219, Apr. 2007.

  81. N. Miura, D. Mizoguchi, M. Inoue, K. Niitsu, Y. Nakagawa, M. Tago, M. Mizuno, T. Sakurai, and T. Kuroda, "A 1Tb/s 3W Inductive-Coupling Transceiver for 3D-Stacked Inter-Chip Clock and Data Link", IEEE Journal of Solid-State Circuits (JSSC), vol.42, no.1, pp.111-122, Jan. 2007. 

  　　
　　　（IEEE format, 1st author, et al.)
  1. R Zhang et al.,"De-correlation and De-bias Post-processing Circuits for True Random Number Generator", IEEE Transactions on Circuits and Systems I (TCAS-I),  2024 
  2. S. Imai et al., “Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency”, Scientific Reports,  vol. 13, no. 7202, pp.9, May. 2023.
  3. A. Tanaka et al., “A 4.5-mW 22-nm CMOS Label-Free Frequency-Shift 3×3×2 3D Biosensor Array Using Vertically-Stacked 60-GHz LC Oscillators”, IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 69, no. 10, pp. 4078-4082, Oct. 2022.
  4. G. Chen et al.,“Design and Experimental Verification of A 2.1 nW 0.018 mm2 Slope ADC-Based Supply Voltage Monitor for Biofuel-Cell-Powered Supply-Sensing Systems in 180-nm CMOS”, IEICE Transactions on Electronics,  vol. E105.C no.10 Pages 565-570, Mar. 2022.
  5. G. Chen et al., “ A 0.5 mm2 Solar Cell-Powered Biofuel Cell-Input Biosensing System with LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens”, IEEE Solid-State Circuits Letters, vol. 5, pp. 41–44, Feb. 2022.
  6. G. Chen et al., “A Solar-Cell-Assisted, 99% Biofuel Cell Area Reduced, Biofuel-Cell-Powered Wireless Biosensing System in 65nm CMOS for Continuous Glucose Monitoring Contact Lenses”, IEICE Transactions on Electronics, vol. E105.C, no.7, pp.343-348, Dec. 2021.
  7. M. Z. Islam et al., “Structure and properties of nanocarbons-encapsulated WC synthesized by solution plasma process in palm oils”, Materials Express, vol. 11, no. 9, pp. 1602-1607(6), Sep. 2021.
  8. M. Z. Islam et al., “High electrical conductivity and oxidation reduction reaction activity of tungsten carbide/carbon nanocomposite synthesized from palm oil by solution plasma process”, Materials Express, vol. 11, no. 9, pp. 1587-1593(7), Sep. 2021.
  9. S. Jodo et al., "A simple gate driver design for GaN-based switching devices with improved surge voltage and switching loss at 1 MHz operation", Japanese Journal of Applied Physics, vol.60, no. SAAD02, Jan. 2021.
  10. M. Z. Islam et al., "Design of an electrical equivalent circuit model of a CMOS-process-compatible glucose fuel cell as a power supply in integrated circuits" Nanoscience and Nanotechnology Letters, vol. 12, no. 5, pp. 642-645 May. 2020.
  11. A. Kobayashi et al.,"Low-Voltage Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS," IEEE Open Journal of Circuits and Systems, vol. 1, pp. 107-114, 2020.
  12. M. Z. Islam et al., “Biomedical Application Via Implantable Devices By CMOS-Compatible Glucose Fuel Cells Using Carbon Nano Horn” ECS Transactions (ECST), vol. 97, no. 7, pp. 311, 2020.
  13. G. Xu et al., "Design and Theoretical Analysis of A BER-Modulated Inductive-Coupling Transceiver Using Dynamic Intermediate InterferenceControl Technique for Low-Power Communication" Sensors and Materials, MYU Tokyo, 2020.
  14. M. Z. Islam et al.,"A Needle-type complementary metal oxide semiconductor-compatible glucose fuel cell fabricated by carbon nanohorns for biomedical applications", Electrochemistry, May. 2020.
  15. S. Murakami, K. Hayashi, S. Arata, G. Xu, C. D. Bui, A. Kobayashi, and K. Niitsu, "Design and Verification of a Stochastic Oscillator Using Multiple Ring Oscillators and OR Gate for Low Voltage Operation in 65 nm CMOS", Sensors and Materials, MYU Tokyo, 2020.
  16. M. Z. Islam et al., "Open circuit voltage and single walled carbon nanotube (wt.%) dependency in solid-state CMOS-compatible glucose fuel cells" Nanoscience and Nanotechnology Letters(NNL),vol. 12, no. 1, pp. 101–106, Jan 2020.
  17. M. Z. Islam et al., "Fabrication of needle type solid-state CMOS compatible glucosefuel cell by CNT material for biomedical application" Sensors and Materials, MYU Tokyo, 2020.
  18. Y. Nishio et al., "A Low-Power Inductive-Coupling Transmitter Using Supply-Insensitive Auxiliary Driving Under Supply-Voltage Fluctuation" Sensors and Materials, MYU Tokyo, 2020.
  19. H. O. Kazanci et al., "Monte Carlo Simulation Driven Time Resolved Photon Fluence Analysis", Optoelectronics Letters, vol.16, pp.237–240, 2020.
  20. A. Kobayashi et al., "Design of a Self-Controlled Dual-Oscillator-Based Supply Voltage Monitor for Biofuel-Cell-Combined Biosensing Systems in 65-nm CMOS and 55-nm DDC CMOS", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.13, no.6, pp. 1152-1162, Dec. 2019.
  21. K. Hayashi et al., ”A 385×385µm2 0.165V 0.27nW Fully-Integrated Supply-Modulated OOK Transmitter in 65nm CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEICE Trans. Elec, vol. E102.C no. 7 pp.590-594. Jul. 2019.
  22. K. Hayashi et al., ”An FSK Inductive-Coupling Transceiver Using 60mV 0.64fJ/bit 0.0016mm2 Load-Modulated Transmitter and LC-Oscillator-Based Receiver in 65nm CMOS for Energy-Budget-Unbalanced Application", IEICE Trans. Elec, vol. E102.C,  no.7, pp.585-589. Jul. 2019.
  23. K. Niitsu et al., ”Design and Theoretical Analysis of a Clock Jitter Reduction Circuit Using Gated Phase Blending Between Self-Delayed Clock Edges", IEICE Electronics Express, vol. 16, no. 13,     pp.20190218 Apr. 2019.

  24. Y. Nishio et al., ”Design and Calibration of a Small-Footprint, Low-Frequency, and Low-Power Gate Leakage Timer Using Differential Leakage Technique”, IEICE Transactions on Electronics, vol. E102-C, no.4, pp.269-275, Apr. 2019.

  25. K. Niitsu et al., "A 65-nm CMOS Fully Integrated Analysis Platform Using an On-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window for Analyzing Circulating Tumor Cell and Exosome", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol. 13, no. 2 pp.470-479, Apr. 2019.

  26. M. Matsunaga et al., "Design and analysis of a three-dimensional millimeter-wave frequency-shift based CMOS biosensor using vertically stacked spiral inductors in LC oscillators", Analog Integrated Circuits and Signal Processing (ALOG), vol.98, no.3, pp.453-464, Mar. 2019.
  27. S. Arata et al., ”Yield and open-circuit-voltage enhancement of 0.36 mm2 Solid-State CMOS-compatible glucose fuel cell by using repeated separator coating”,  Japanese Journal of Applied Physics, vol.58, no. SB, pp. SBBG11, Feb. 2019.
  28. K. Niitsu et al., ”An Energy-Autonomous Biosensing Platform Using Supply-Sensing CMOS Integrated Sensor and Bio Fuel Cell for Next-Generation Healthcare IoT", Japanese Journal of Applied Physics. vol.57, no.10, Sep. 2018.

  29. K. Hayash et al., "A 6.1nA Fully-Integrated CMOS Supply-Modulated OOK Transmitter in 55nm DDC CMOS for Glass-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEEE Transactions on Circuits and Systems II (TCAS-II), vol.65, no.10, pp.1360-1364, Oct. 2018. 

  30. K. Niitsu et al., "A Self-Powered Supply-Sensing Biosensor Platform Using Bio Fuel Cell and Low-Voltage, Low-Cost CMOS Supply-Controlled Ring Oscillator with Inductive-Coupling Transmitter for Healthcare IoT", IEEE Transactions on Circuits and Systems I (TCAS-I), vol.65, no.9, pp.2784-2796, Sep. 2018.

  31. S. Arata et al., "Wafer-scale development and experimental verification of 0.36-mm² 228-mV open-circuit-voltage solid-state CMOS-compatible glucose fuel cell for healthcare IoT application", Japanese Journal of Applied Physics, vol.57, no.4S, pp.04FM04, Mar. 2018. 

  32. M. Matsunaga et al., "Design Trade-Off between Spatial Resolution and Power Consumption in CMOS Biosensor Circuit Based on Millimeter-Wave LC-Oscillator Array", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC02, Jan. 2018. 

  33. T. Nakanishi et al., "A 40-GHz fully integrated circulating tumor cell analysis vector network analyzer in 65-nm CMOS technology with coplanar-line-based detection area", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC01, Jan. 2018. 

  34. K. Itakura et al., "Theoretical Analysis and Simulation Study of Low-Power CMOS Electrochemical Impedance Spectroscopy Biosensor in 55nm DDC Technology for Cell-State Monitoring", Japanese Journal of Applied Physics, vol.57, no.1S, pp.01AG02, Jan. 2018. 

  35. A. Kobayashi et al., "Design and Experimental Verification of 0.19 V 53 μW 65 nm CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter for a Self-Powered Bio-Sensing Using a Biofuel Cell", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.11, no.6, pp.1313-1323, Dec. 2017.

  36. K. Ikeda et al., "Design and Electrochemical Measurement of a Current-Mode Analog-to-Time Converter with Short-Pulse Output Capability Using Local Intra-Cell Activation for High-Speed Time-Domain Biosensor Array", Analog Integrated Circuits and Signal Processing (ALOG), vol.92, no.3, pp.403-413, Jun. 2017.

  37. K. Gamo et al., "A Current-Integration-Based CMOS Amperometric Sensor with 1024 × 1024 Bacteria-Sized Microelectrode Array for High-Sensitivity Bacteria Counting", IEICE Transactions on Electronics, Vol.E100-C, No.6, pp.602-606, Jun. 2017. 

  38. K. Nakazato et al., "Biosensor integrated circuits using CMOS technology",Institute of Electrical Engineers of Japan,vol.137, no.10, pp.291-215, 2017.

  39. K. Ikeda et al., "Design and Analysis of Scalability in Current-Mode Analog-to-Time Converter for an Energy-Efficient and High-Resolution CMOS Biosensor Array", IEICE Transactions on Electronics, vol.E100-C, No.6, pp.597-601, Jun. 2017. 

  40. Y. Yamaji et al., "Sub-1-V CMOS-Based Electrophoresis Using Electroless Gold Plating for Small-Form-Factor Biomolecule Manipulation", IEICE Transactions on Electronics, vol.E100-C, No.6, pp.592-596, Jun. 2017.

  41. K. Niitsu et al., "Design, Experimental Verification, and Analysis of a 1.8-V-Input-range Voltage-to-Current Converter Using Source Degeneration for Low-Noise Multimodal CMOS Biosensor Array", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH06, Jan. 2017.

  42. K. Niitsu et al., "Design and experimental verification of CMOS Magnetic-Based Microbeads Detection Using an Asynchronous Intra-chip Inductive-Coupling Transceiver", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH05, Jan. 2017.

  43. K. Niitsu et al., "Enhancement in open-circuit voltage of implantable CMOS-compatible glucose fuel cell by improving the anodic catalyst", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH04, Jan. 2017.

  44. A. Kobayashi et al., "Energy-efficient and low-voltage design methodology for a supply-sensing CMOS biosensor using biofuel cells for energy-autonomous healthcare applications", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH03, Jan. 2017.

  45. K. Gamo et al., "Design, theoretical analysis, and experimental verification of a CMOS current integrator with 1.2 × 2.05 µm2 microelectrode array for high-sensitivity bacterial counting", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH01, Jan. 2017.

  46. K. Niitsu et al., "Well-Shaped Microelectrode Array Structure for High-Density CMOS Amperometric Electrochemical Sensor Array", IEICE Transactions on Electronics, vol.E99-C, no.6, pp.663-666, Jun. 2016.

  47. K. Niitsu et al., "Design and experimental demonstration of low-power CMOS magnetic cell manipulation platform using charge recycling technique", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF13 (4 pages), Feb. 2016. 

  48. S. Tanaka et al., "A Low-Power Inverter-Based CMOS Level-Crossing A/D Converter for Low-frequency Biosignal Sensing", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF10 (7 pages), Feb. 2016.

  49. Y. Yamaji et al., "Design and Experimental Verification of Low-Voltage Two-Dimensional CMOS Electrophoresis Platform with 32×32 Sample/Hold Cell Array", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF07 (5 pages), Feb. 2016.

  50. K. Niitsu et al., "Development of Microelectrode Arrays Using Electroless Plating for CMOS-Based Direct Counting of Bacterial and HeLa Cells," in IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), Nov.2015.

  51. K. Niitsu et al., "A CMOS PWM Transceiver Using Self-Referenced Edge Detection," in IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), Jun.2015. 

  52. H. Ishihara et al., "Analysis and Experimental Verification of DNA Single Base Polymerization Detection Using CMOS FET-Based Redox Potential Sensor Array," Japanese Journal of Applied Physics, Mar.2015.

  53. Y. Osawa et al., "Phase Noise Measurement and Testing with Delta-Sigma TDC," Key Engineering Materials, May.2015.

  54. G. Jin et al., "Digital Auto-Tuning for Center Frequency and Q-Factor of Gm-C Band-Pass Filter," Key Engineering Materials, vol.Advanced Micro-Device Engineering V, May.2015.

  55. K. Niitsu et al., "A Low-Offset Cascaded Time Amplifier with Reconfigurable Inter-Stage Connection", IEICE Electronics Express, vol.11, no.10, pp.20140203, May. 2014.

  56. T. Kuno et al., "Amperometric Electrochemical Sensor Array for On-Chip Simultaneous Imaging", Japanese Journal of Applied Physics, vol.53, pp.04EL01 (7 pages), Feb. 2014.

  57. K. Niitsu et al., "Design Methodology and Jitter Analysis of a Delay Line for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.596, pp.176-180, Jan. 2014.

  58. K. Niitsu et al., "Analysis on a Cascaded Structure in Open-Loop Time Amplifier for High-Speed Operation", Key Engineering Materials, vol.596, pp.171-175, Jan. 2014.

  59. Y. Tan et al., "Self-Calibration Techniques of Pipeline ADCs Using Cyclic Configuration", Key Engineering Materials, vol.596, pp.181-186, Jan. 2014.

  60. S. Uemori et al., "Multi-bit Sigma-Delta TDC Architecture with Improved Linearity”, Journal of Electronic Testing : Theory and Applications, vol.29, no.6, pp.879-892, Dec. 2013.

  61. K. Niitsu et al., "Design Methodology for Determining the Number of Stages in a Cascaded Time Amplifier to Minimize Area Consumption", IEICE Electronics Express, vol.10, no.11, pp.20130289, Jun. 2013.

  62. K. Niitsu et al., "A Feed-Forward Time Amplifier Using Phase Detector and Variable Delay Line", IEICE Transactions on Electronics, vol.E96-C, no.6, pp.920-922, Jun. 2013.

  63. K. Kato et al., "Two-Tone Signal Generation  for ADC Testing", IEICE Transactions on Electronics, vol.E96-C, no.6, pp.850-858, Jun. 2013.

  64. Z. Nosker et al., "A Small, Low Power Boost Regulator Optimized for Energy Harvesting Applications", Analog Integrated Circuits and Signal Processing, vol.75, no.2, pp.207-216, Apr. 2013.

  65. K. Niitsu et al., "An Analytical Study on Jitter Accumulation in Interleaved Phase Frequency Detectors for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.534, pp.197-205, Jan. 2013.

  66. Z. Noske ret al., "A High Efficiency, Extended Load Range Boost Regulator Optimized for Energy Harvesting Applications", Key Engineering Materials, vol.534, pp.206-219, Jan. 2013.

  67. K. Niitsu et al., "CMOS Circuits to Measure Timing Jitter Using a Self-Referenced Clock and a Cascaded Time Difference Amplifier with Duty-Cycle Compensation",  IEEE Journal of Solid-State Circuits (JSSC), vol.47, no.11, pp.2701-2710, Nov. 2012.

  68. K. Wakabayashi et al., "Low-Distortion Sinewave Generation Method Using Arbitrary Waveform Generator", Journal of Electronic Testing: Theory and Applications, vol.28, no.5, pp.641-651, Oct. 2012.

  69. K. Niitsu et al., "A 65fJ/b Inter-Chip Inductive-Coupling Data Transceivers Using Charge-Recycling Technique for Low-Power Inter-Chip Communication in 3-D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.20, no.7, pp.1285-1294, Jul. 2012.

  70. J. Ye et al., "Architecture of High-Efficiency Digitally-Controlled Class-E Power Amplifier", Key Engineering Materials, vol.487, pp.285-295, Dec. 2011.

  71. K. Niitsu et al., "A 14 GHz AC-Coupled Clock Distribution Scheme with Phase Averaging Technique Using Sigle LC-VCO and Distributed Phase Interpolators", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.11, pp.2058-2066, Nov. 2011.

  72. K. Niitsu et al., "Analysis and Techniques for Mitigating Interference from Power/Signal Lines and to SRAM Circuits in CMOS Inductive-Coupling Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.10, pp.1902-1907, Oct. 2011.

  73. T. Ogawa et al., "Design for Testability That Reduces Linearity Testing Time of SAR ADCs”, IEICE Transactions on Electronics, vol.E94-C, no.6, pp.1061-1064, Jun. 2011.

  74. K. Niitsu et al., "Modeling and Experimental Verification of Misalignment Tolerance in Inductive-Coupling Inter-Chip Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.18, no.8, pp.1238-1243, Aug. 2010.

  75. M. Saen et al., "3-D System Integration of Processor and Multi-Stacked SRAMs Using Inductive-Coupling Link", IEEE Journal of Solid-State Circuits (JSSC), vol.45, no.4, pp.856-862, Apr. 2010.

  76. K. Niitsu et al., "A 33% Improvement in Efficiency of Wireless Inter-Chip Power Delivery by Thin Film Magnetic Material for Three-Dimensional System Integration", Japanese Journal of Applied Physics, vol.48, pp.04C073 (5 pages), Apr. 2009.

  77. V. V. Kulkarni et al., "A 750 Mb/s, 12 pJ/b, 6-to-10 GHz CMOS IR-UWB Transmitter With Embedded On-Chip Antenna", IEEE Journal of Solid-State Circuits (JSSC), vol.44, no.2, pp.394-403, Feb. 2009.

  78. N. Miura et al., "A 0.14pJ/bit Inductive-Coupling Transceiver with Digitally-Controlled Precise Pulse Shaping", IEEE Journal of Solid-State Circuits (JSSC), vol.43, no.1, pp.285-291, Jan. 2008.

  79. K. Niitsu et al., "Daisy Chain Transmitter for Power Reduction in Inductive-Coupling CMOS Link”, IEICE Transactions on Electronics, vol.E90-C, no.4, pp.829-835, Apr. 2007.

  80. K. Niitsu et al., "60% Power Reduction in Inductive-Coupling Inter-Chip Link by Current-Sensing Technique", Japanese Journal of Applied Physics, vol.46, no.4B, pp.2215-2219, Apr. 2007.

  81. N. Miura et al., "A 1Tb/s 3W Inductive-Coupling Transceiver for 3D-Stacked Inter-Chip Clock and Data Link", IEEE Journal of Solid-State Circuits (JSSC), vol.42, no.1, pp.111-122, Jan. 2007. 

       
         (JSAP format)
  1. R Zhang, H Zhang, X Wang, Y Ziyang, K Liu, S Nishizawa, K Niitsu, and H Shinohara,  IEEE Transactions on Circuits and Systems I (TCAS-I),  2024.
  2. S. Imai, H. Homma, K. Takimoto, M. Tanikawa, J. Nakamura, M.Kaneko, Y. Osaki, K. Niitsu, C. Yongzhi, A. A. Fathnan, and H. Wakatsuchi, Scientific Reports,  vol. 13, no. 7202, pp.9, May. 2023.
  3. A. Tanaka, G. Chen, and K. Niitsu, IEEE Transactions on Circuits and Systems II: Express Briefs ( Early Access ),  Jun. 2022.
  4. G. Chen, X. Chen and K. Niitsu, IEICE Transactions on Electronics,  Vol. E105.C no.10 pp. 565-570, Mar. 2022.
  5. G. Chen, Y. Wang, T. M. Quan, N. Matsuyama, T. Tsujimura and K. Niitsu, IEEE Solid-State Circuits Letters, Feb. 2022.
  6. G. Chen and K. Niitsu, IEICE Transactions,  Dec. 2021.
  7. M. Z. Islam, A. Watthanaphanit, S. Chae, K. Niitsu and N. Saito, Materials Express, vol.11, no. 9, pp. 1602-1607(6), Sep. 2021.
  8. M. Z. Islam, A. Watthanaphanit, S. Chae, K. Niitsu and N. Saito, Materials Express, vol.11, no. 9, pp. 1587-1593(7), Sep. 2021.
  9. S. Jodo, T. Iwaki, K. Uchiyama, M. Islam, K. Kataoka, Y. Hayasaka, J. Imaoka, M. Yamamoto, K. Niitsu, Japanese Journal of Applied Physics, vol.60, no. SAAD02, Jan. 2021.
  10. M. Z. Islam, S. Arata, K. Hayashi, X. Ge, N. Matsuyama, S. Murakami, A. Kobayashi, H. Cheng, and K. Niitsu, Nanoscience and Nanotechnology Letters, Sep. 2020.
  11. S. Jodo, T. Iwaki, K. Uchiyama, M. Islam, K. Kataoka, Y. Hayasaka, J. Imaoka, M. Yamamoto, K. Niitsu, Japanese Journal of Applied Physics, 60[SA], (2020).
  12. A. Kobayashi, and K. Niitsu, IEEE Open Journal of Circuits and Systems(OJCAS 2020), Jun. 2020.
  13. M. Z. Islam, S. Arata, K. Hayashi, A. Kobayashi, Y. Momoi and K. Niitsu, ECS Transactions” (ECST) 2020.
  14. G. Xu, K. Hayashi, S. Arata, S. Murakami, D. C. Bui, A. Kobayashi and K. Niitsu, Sensors and Materials, MYU Tokyo, 2020.
  15. M. Z. Islama, N. Matsuyama, G. Chen, A. Kobayashi, Y. Momoi and K. Niitsu, Electrochemistry, May, 2020.
  16. S. Murakami, K. Hayashi, S. Arata, G. Xu, C. D. Bui, A. Kobayashi, and K. Niitsu, Sensors and Materials, MYU Tokyo, 2020.
  17. M. Z. Islam, S. Arata, K. Hayashi, A. Kobayashi, and K. Niitsu, Nanoscience and Nanotechnology Letters(NNL), 12[1], 101–106(2020).
  18. M. Z. Islam, S. Arata, K. Hayashi, A. Kobayashi and K. Niitsu, Sensors and Materials, MYU Tokyo, 2019.
  19. Y. Nishio, A. Kobayashi and K. Niitsu, Sensors and Materials, MYU Tokyo, 2019.
  20. H. O. Kazanci, K. Niitsu, Optoelectronics Letters, 2020.
  21. A. Kobayashi, K. Hayashi, S. Arata, S. Murakami, G. Xu, and K. Niitsu, IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), 13, 6, 1152-1162, Dec. 2019.
  22. K. Niitsu, Jpn. J. Appl. Phys. 57[10], (2019)
  23. K. Hayashi, S. Arata, G. Xu, S. Murakami, C. D. Bui, A. Kobayashi, and K. Niitsu, IEICE Trans. Elec,  E102.C 7 590-594. Jul. 2019.
  24. K. Hayashi, S. Arata, G. Xu, S. Murakami, C. D. Bui, A. Kobayashi, and K. Niitsu, IEICE Trans. Elec,  E102.C,  7, 585-589. Jul. 2019.
  25. K. Niitsu, O. Kobayashi, T. J. Yamaguchi and H. Kobayashi, IEICE Electronics Express, 16, 13, 20190218 Apr. 2019.

  26. Y. Nishio, A. Kobayashi, and K. Niitsu, IEICE Transactions on Electronics, E102-C, 4, 269-275, Apr. 2019.

  27. K. Niitsu, T. Nakanishi, S. Murakami, M. Matsunaga, A. Kobayashi, N. M. Karim, J. Ito, N. Ozawa, T. Hase, H. Tanaka, M. Sato, H. Kondo, K. Ishikawa, H. Odaka, Y. Hasegawa, M. Hori, and K. Nakazato, IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), 13, 2, 470-479, Apr. 2019.

  28. M. Matsunaga, T. Nakanishi, A. Kobayashi, K. Nakazato, and K. Niitsu, Analog Integrated Circuits and Signal Processing (ALOG), 98, 3, 453-464, Mar. 2019.

  29. S. Arata, K. Hayashi, X. Ge, S. Murakami, C. D. Bui, A. Kobayashi, and K. Niitsu, Jpn. Japanese Journal of Applied Physics, 58, SB, SBBG11, Feb. 2019.

  30. K. Hayashi, S. Arata, S. Murakami, Y. Nishio, A. Kobayashi, and K. Niitsu, IEEE Trans. on Circuits and Systems II, 65 [10], 1360 (2018).

  31. K. Niitsu, A. Kobayashi, K. Hayashi, Y. Nishio, K. Ikeda, T. Ando, Y. Ogawa, H. Kai, M. Nishizawa, and K. Nakazato, IEEE Trans. on Circuits and Systems I, 65 [9], 2784 (2018).

  32. M. Matsunaga, A. Kobayashi, K. Nakazato, and K. Niitsu, Jpn. J. Appl. Phys, 57 [3S2], 03EC02 (2018).

  33. T. Nakanishi, M. Matsunaga, A. Kobayashi, K. Nakazato, and K. Niitsu, Jpn. J. Appl. Phys, 57 [3S2], 03EC01 (2018).

  34. K. Itakura, K. Kayano, K. Nakazato and K. Niitsu, Jpn. J. Appl. Phys, 57 [1S], 01AG02 (2018).

  35. S. Arata, K. Hayashi, Y. Nishio, A. Kobayashi, K. Nakazato, and K. Niitsu, Jpn. J. Appl. Phys, 57 [4S 04FM04], (2018).

  36. A. Kobayashi, K. Ikeda, Y. Ogawa, H. Kai, M. Nishizawa, K. Nakazato, and K. Niitsu, IEEE Trans. on Biomedical Circuits and Systems, 65 [6], 1313 (2017).

  37. K. Ikeda, A. Kobayashi, K. Nakazato, and K. Niitsu, Analog Integrated Circuits and Signal Processing, 92 [3], 403 (2017).   

  38. K. Gamo, K. Nakazato, and K. Niitsu, IEICE Trans. on Electronics, E100-C [6], 602 (2017).

  39. K. Ikeda, A. Kobayashi, K. Nakazato, and K. Niitsu, IEICE Trans. on Electronics, E100-C [6], 597 (2017). 

  40. Y. Yamaji, K. Nakazato, and K. Niitsu, IEICE Trans. on Electronics, E100-C [6], 592 (2017).

  41. K. Niitsu, K. Ikeda, K. Muto, and K. Nakazato, Jpn. J. Appl. Phys, 56 [1S], 01AH06 (2017).

  42. K. Niitsu, A. Kobayashi, K. Yoshida, and K. Nakazato, Jpn. J. Appl. Phys, 56 [1S], 01AH05 (2017).

  43. K. Niitsu, T. Ando, and K. Nakazato, Jpn. J. Appl. Phys, 56 [1S], 01AH04 (2017).

  44. A. Kobayashi, K. Ikeda, K. Nakazato, and K. Niitsu, Jpn. J. Appl. Phys, 56 [1S 01AH03], (2017).

  45. K. Gamo, K. Nakazato, and K. Niitsu, Jpn. J. Appl. Phys, 56 [1S], 01AH01 (2017).

  46. K. Niitsu, T. Kuno, M. Takihi, and K. Nakazato, IEICE Trans. on Electronics, E99-C [6], 663 (2016).

  47. K. Niitsu, K. Yoshida, and K. Nakazato, Jpn. J. Appl. Phys, 55 [3S2],  03DF13 (2016).

  48. S. Tanaka, K. Niitsu, and K. Nakazato, Jpn. J. Appl. Phys, 55 [3S2 03DF10], 7 (2016). 

  49. Y. Yamaji, K. Niitsu, and K. Nakazato, Jpn. J. Appl. Phys, 55 [3S2], 03DF07 (2016).

  50. K. Niitsu, S. Ota, K. Gamo, H. Kondo, M. Hori, and K. Nakazato, IEEE Trans. on Biomedical Circuits and Systems, 9 [5], 607 (2015).

  51. K. Niitsu, Y. Osawa, D. Hirabayashi, O. Kobayashi, T. J. Yamaguchi, and H. Kobayashi, IEEE Trans on Very Large Scale Integration Systems, 23 [6], 1145 (2015).

  52. H. Ishihara, K. Niitsu, and K. Nakazato, Jpn. J. Appl. Phys, 54 [4S], 04DL05 (2015).

  53. Y. Osawa, D. Hirabayashi, N. Harigai, H. Kobayashi, O. Kobayashi , M. Tsuji, S. Umeda, R. Shiota, N. Dobashi, M. Watanabe, T. Matsuura, K. Niitsu, I. Shimizu, N. Takai, and T. J. Yamaguchi, Key Engineering Materials, 643,149 (2015).

  54. G. Jin, H. Chen, C. Gao, Y. Zhang, M. Li , H. Kobayashi, S. Wu, N. Takai, K. Niitsu, and K. Hadidi, Key Engineering Materials, Advanced Micro-Device Engineering V, 123 (2015).

  55. K. Niitsu, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, IEICE Electronics Express, 11 [10], 20140203 (2014). 

  56. T. Kuno, K. Niitsu, and K. Nakazato, Jpn. J. Appl. Phys, 53, 04EL01 (2014).

  57. K. Niitsu, K. Sakuma, N. Harigai, D. Hirabayashi, N. Takai, T. J. Yamaguchi, and H. Kobayashi, Key Engineering Materials,596,176 (2014).

  58. K. Niitsu, N. Harigai, D. Hirabayashi, M. Sakurai, T. J. Yamaguchi, and H. Kobayashi, Key Engineering Materials, 596, 171 (2014).

  59. Y. Tan, D. Oki, Y. Liu, Y. Arai, Z. Nosker, H. Kobayashi, O. Kobayashi, T. Matsuura, Z. Yang, A. Katayama, L. Quan, E. Li, K. Niitsu, and N. Takai, Key Engineering Materials, 596, 181 (2014).

  60. S. Uemori, M. Ishii, H. Kobayashi, D. Hirabayashi, Y. Arakawa, Y. Doi, O. Kobayashi, T. Matsuura, K. Niitsu, Y. Yano, T. Gake, T. J. Yamaguchi, and N. Takai, Journal of Electronic Testing : Theory and Applications, 29 [6], 879 (2013).

  61. K. Niitsu, N. Harigai, and H. Kobayashi, IEICE Electronics Express, 10, [11], 20130289 (2013).

  62. K. Niitsu, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, IEICE Trans. on Electronics, E96-C [6], 920(2013).

  63. K. Kato, F. Abe, K. Wakabayashi, C. Gao, T. Yamada, H. Kobayashi, O. Kobayashi, and K. Niitsu, IEICE Trans. on Electronics, E96-C [6], 850 (2013).

  64. Z. Nosker, Y. Kobori, H. Kobayashi, K. Niitsu, N. Takai, T. Oomori, T. Odaguchi, I. Nakanishi, K. Nemoto, J. Matsuda, Analog Integrated Circuits and Signal Processing, 75 [2], 207 (2013).

  65. K. Niitsu, M. Sakurai, N. Harigai, D. Hirabayashi, D. Oki, T. J. Yamaguchi, and H. Kobayashi, Key Engineering Materials, 534, 197 (2013).

  66. Z. Nosker, Y. Kobori, H. Kobayashi, K. Niitsu, N. Takai, T. Oomori, T. Odaguchi, I. Nakanishi, K. Nemoto, J. Matsuda, Key Engineering Materials, 534, 206 (2013).

  67. K. Niitsu, M. Sakurai, N. Harigai, T. J. Yamaguchi, and H. Kobayashi, IEEE Journal of Solid-State Circuits, 47 [11], 2701 (2012).

  68. K. Wakabayashi, K. Kato, T. Yamada, O. Kobayashi, H. Kobayashi, F. Abe, and K. Niitsu, Journal of Electronic Testing: Theory and Applications, 28 [5], 641 (2012).

  69. K. Niitsu, S. Kawai, N. Miura, H. Ishikuro, and T. Kuroda, IEEE Trans. on Very Large Scale Integration Systems, 20 [7], 1285 (2012).

  70. J. Ye, Z. Nosker, K. Wakabayashi, T. Yagi, O. Yamamoto, N. Takai, K. Niitsu, K. Kato, T. Ootsuki, I. Akiyama, and H. Kobayashi, Key Engineering Materials, 487, 285 (2011).

  71. K. Niitsu, S. Kang, V. V. Kulkarni, H. Ishikuro, and T. Kuroda, IEEE Trans. on Very Large Scale Integration Systems, 19 [11], 2058 (2011).

  72. K. Niitsu, Y. Sugimori, Y. Kohama, K. Osada, N. Irie, H. Ishikuro, and T. Kuroda, IEEE Trans. on Very Large Scale Integration Systems, 19 [10], 1902 (2011).

  73. T. Ogawa, H. Kobayashi, S. Uemori, Y. Tan, S. Ito, N. Takai, T. J. Yamaguchi, and K. Niitsu, IEICE Trans. on Electronics, E94-C [6], 1061 (2011).

  74. K. Niitsu, Y. Kohama, Y. Sugimori, K. Kasuga, K. Osada, N. Irie, H. Ishikuro, and T. Kuroda, IEEE Trans. on Very Large Scale Integration Systems, 18 [8], 1238 (2010).

  75. M. Saen, K. Osada, Y. Okuma, K. Niitsu, Y. Shimazaki, Y. Sugimori, Y. Kohama, K. Kasuga, I. Nonomura, N. Irie, T. Hattori, A. Hasegawa, and T. Kuroda, IEEE Journal of Solid-State Circuits, 45 [4], 856 (2010).

  76. K. Niitsu, Y. Yuxiang, H. Ishikuro, and T. Kuroda, Jpn. J. Appl. Phys, 48 04C073 (2009).

  77. V. V. Kulkarni, M. Muqsith, K. Niitsu, H. Ishikuro and T. Kuroda, IEEE Journal of Solid-State Circuits, 44 [2], 394 (2009).

  78. N. Miura, H. Ishikuro, K. Niitsu, T. Sakurai, and T. Kuroda, IEEE Journal of Solid-State Circuits, 43 [1], 285 (2008).

  79. K. Niitsu, N. Miura, M. Inoue, Y. Nakagawa, M. Tago, M. Mizuno, T. Sakurai, and T. Kuroda, IEICE Trans. on Electronics, E90-C [4], 829 (2007). 

  80. K. Niitsu, N. Miura, M. Inoue, Y. Nakagawa, M. Tago, M. Mizuno, H. Ishikuro, and T. Kuroda, Jpn. J. Appl. Phys, 46 [4B], 2215 (2007).

  81. N. Miura, D. Mizoguchi, M. Inoue, K. Niitsu, Y. Nakagawa, M. Tago, M. Mizuno, T. Sakurai, and T. Kuroda, IEEE Journal of Solid-State Circuits, 42 [1], 111 (2007).    

　　      
　　 　 (other format)
  1. Ruilin Z, Haochen Z, Xingyu W, Ye Z, Kunyang L, Shinichi N, Kiichi N, and Hirofumi S, "De-correlation and De-bias Post-processing Circuits for True Random Number Generator", IEEE Transactions on Circuits and Systems I (TCAS-I),  2024.
  2. Shiori I, Haruki H, Kairi T, Mizuki T, Jin N, Masaya, K, Yuya O, Kiichi N, Cheng Y Ashif A F  and Hiroki W, “Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency”, Scientific Reports,  vol. 13, no. 7202, pp.9, May. 2023.　
  3. Tanaka A., Chen G., and Niitsu K., “A 4.5-mW 22-nm CMOS Label-Free Frequency-Shift 3×3×2 3D Biosensor Array Using Vertically-Stacked 60-GHz LC Oscillators”, IEEE Transactions on Circuits and Systems II: Express Briefs ( Early Access ),  Jun. 2022.
  4. Chen G., Chen X., and Niitsu K., “Design and Experimental Verification of A 2.1 nW 0.018 mm2 Slope ADC-Based Supply Voltage Monitor for Biofuel-Cell-Powered Supply-Sensing Systems in 180-nm CMOS”, IEICE Transactions on Electronics, Volume E105.C Issue 10 Pages 565-570, Mar. 2022.
  5. Chen G., Wang Y., Quan T Q., Matsuyama N., Tsujimura T. and Niitsu K., “ A 0.5 mm2 Solar Cell-Powered Biofuel Cell-Input Biosensing System with LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens”, IEEE Solid-State Circuits Letters, vol. 5, pp. 41–44, Feb. 2022.
  6. Chen G., and Niitsu K., “A Solar-Cell-Assisted, 99% Biofuel Cell Area Reduced, Biofuel-Cell-Powered Wireless Biosensing System in 65nm CMOS for Continuous Glucose Monitoring Contact Lenses”, IEICE Transactions on Electronics, vol. E105.C, no.7, pp.343-348, Dec. 2021.
  7. Islam M. Z., Watthanaphanit A., Chae S., Niitsu K., and Saito N.,“Structure and properties of nanocarbons-encapsulated WC synthesized by solution plasma process in palm oils”, Materials Express, Volume 11, Number 9, pp. 1602-1607(6), Sep. 2021.
  8. Islam M. Z., Watthanaphanit A., Chae S., Niitsu K., and Saito N., “High electrical conductivity and oxidation reduction reaction activity of tungsten carbide/carbon nanocomposite synthesized from palm oil by solution plasma process”, Materials Express, Volume 11, Number 9, pp. 1587-1593(7), Sep. 2021.
  9. Jodo S., Iwaki T., Uchiyama K., Islam M., Kataoka K., Hayasaka Y, Imaoka J., Yamamoto M., Niitsu K., "A simple gate driver design for GaN-based switching devices with improved surge voltage and switching loss at 1 MHz operation" Japanese Journal of Applied Physics, vol.60, no. SAAD02, Jan. 2021.
  10. Islam M. Z., Arata S., Hayashi K., Ge X., Matsuyama N., Murakami S., Kobayashi A., Cheng H., and Niitsu K., "Design of an electrical equivalent circuit model of a CMOS-process-compatible glucose fuel cell as a power supply in integrated circuits" Nanoscience and Nanotechnology Letters, Sep. 2020.
  11. Kobayashi A., and Niitsu K., "Low-Voltage Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS" IEEE Open Journal of Circuits and Systems(OJCAS 2020), Jun. 2020.
  12. Islam M. Z., Arata S., Hayashi K., Kobayashi A., Momoi Y. and Niitsu K., “Biomedical Application Via Implantable Devices By CMOS-Compatible Glucose Fuel Cells Using Carbon Nano Horn” ECS Transactions” (ECST) 2020.
  13. Xu G., Hayashi K., Arata S., Murakami S., Bui D.C., Kobayashi A. and Niitsu K., "Design and Theoretical Analysis of A BER-Modulated Inductive-Coupling Transceiver Using Dynamic Intermediate InterferenceControl Technique for Low-Power Communication" Sensors and Materials, MYU Tokyo, 2020.
  14. Islama M. Z., Matsuyama N., Chen G., Kobayashi A., Momoi Y. and Niitsu K., "A Needle-type complementary metal oxide semiconductor-compatible glucose fuel cell fabricated by carbon nanohorns for biomedical applications", Electrochemistry, May. 2020.
  15. Murakami S., Hayashi K., Arata S., Xu G., Bui C. D., Kobayashi A., and Niitsu K., "Design and Verification of a Stochastic Oscillator Using Multiple Ring Oscillators and OR Gate for Low Voltage Operation in 65 nm CMOS", Sensors and Materials, MYU Tokyo, 2020.
  16. Islam Z. M., Arata S., Hayashi K., Kobayashi A., and Niitsu K., "Open circuit voltage and single walled carbon nanotube (wt.%) dependency in solid-state CMOS-compatible glucose fuel cells" Nanoscience and Nanotechnology Letters(NNL), vol. 12, no. 1, pp. 101–106, Jan 2020.
  17. Islam M. Z., Arata S., Hayashi K., Kobayashi A. and Niitsu K., "Fabrication of needle type solid-state CMOS compatible glucosefuel cell by CNT material for biomedical application" Sensors and Materials, MYU Tokyo, 2020.
  18. Nishio Y., Kobayashi A. and Niitsu K., "A Low-Power Inductive-Coupling Transmitter Using Supply-Insensitive Auxiliary Driving Under Supply-Voltage Fluctuation" Sensors and Materials, MYU Tokyo, 2020.
  19. Kazanci H. O., Niitsu K., "Monte Carlo Simulation Driven Time Resolved Photon Fluence Analysis", Optoelectronics Letters, vol.16, pp.237–240, 2020.
  20. Kobayashi A, Hayashi K, Arata S, Murakami S, Xu G, and Niitsu K, "Design of a Self-Controlled Dual-Oscillator-Based Supply VoltageMonitor for Biofuel-Cell-CombinedBiosensing Systems in 65-nm CMOS and 55-nm DDCCMOS", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.13, no.6, pp.1152-1162, Dec. 2019.

  21. Hayashi K., Arata S., Xu G., Murakami S., Bui C. D., Kobayashi A., and Niitsu K., ”A 385 ×385 μm20.165V 0.27nW Fully-Integrated Supply-Modulated OOK Transmitterin 65nm CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEICE Trans. Elec. vol. E102.C no. 7 pp.590-594. Jul. 2019.

  22. Hayashi K., Arata S., Xu G., Murakami S., Bui C. D., Kobayashi A., and Niitsu K.,”An FSK Inductive-Coupling Transceiver Using 60mV 0.64fJ/bit 0.0016 mm2Load-Modulated transmitter and LC-Oscillator-Based Receiver in 65 nm CMOS for Energy-Budget-Unbalanced Application", IEICE Trans. Elec. vol. E102.C, no.7, pp.585-589. Jul. 2019.
  23. Niitsu K., Kobayashi O., Yamaguchi T. J. and Kobayashi H., ”Design and Theoretical Analysis of a Clock Jitter Reduction Circuit Using Gated Phase Blending Between Self-Delayed Clock Edges", IEICE Electronics Express. vol. 16, no. 13, pp.20190218 Apr. 2019.

  24. Nishio Y., Kobayashi A., and Niitsu K, ”Design and Calibration of a Small-Footprint, Low-Frequency, and Low-Power Gate Leakage Timer Using Differential Leakage Technique”, IEICE Transactions on Electronics, vol. E102.C no.4 pp.269-275, Apr. 2019.

  25. Niitsu K., Nakanishi T., Murakami S., Matsunaga M., Kobayashi A., Karim N. M., Ito J., Ozawa N., Hase T., Tanaka H., Sato M., Kondo H., Ishikawa K., Odaka H., Hasegawa Y., Hori M., and Nakazato K., "A 65-nm CMOS Fully Integrated Analysis Platform Using an On-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window for Analyzing Circulating Tumor Cell and Exosome",  IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.13, no.2 pp.470-479, Apr. 2019

  26. Matsunaga M., Nakanishi T., Kobayashi A., Nakazato K., and Niitsu K., "Design and analysis of a three-dimensional millimeter-wave frequency-shift based CMOS biosensor using vertically stacked spiral inductors in LC oscillators", Analog Integrated Circuits and Signal Processing (ALOG), vol.98, no.3, pp.453-464, Mar. 2019.

  27. Arata S., Hayashi K., Ge X., Murakami S., Bui C. D., Kobayashi A., and Niitsu K., ”Yield and open-circuit-voltage enhancement of 0.36 mm2 Solid-State CMOS-compatible glucose fuel cell by using repeated separator coating”, Japanese Journal of Applied Physics. vol.58, no. SB, Feb. 2019.

  28. Hayashi K., Arata S., Murakami S., Nishio Y., Kobayashi A., and Niitsu K., "A 6.1nA Fully-Integrated CMOS Supply-Modulated OOK Transmitter in 55nm DDC CMOS for Glass-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEEE Transactions on Circuits and Systems II (TCAS-II), vol.65, no.10, pp.1360-1364, Oct. 2018. 

  29. Niitsu K., ”An Energy-Autonomous Biosensing Platform Using Supply-Sensing CMOS Integrated Sensor and Bio Fuel Cell for Next-Generation Healthcare IoT", Japanese Journal of Applied Physics. vol.57, no.10, Sep. 2018.

  30. Niitsu K., Kobayashi A., Hayashi K., Nishio Y., Ikeda K., Ando T., Ogawa Y., Kai H., Nishizawa M., and Nakazato K., "A Self-Powered Supply-Sensing Biosensor Platform Using Bio Fuel Cell and Low-Voltage, Low-Cost CMOS Supply-Controlled Ring Oscillator with Inductive-Coupling Transmitter for Healthcare IoT", IEEE Transactions on Circuits and Systems I (TCAS-I), vol.65, no.9, pp.2784 - 2796, Sep. 2018.

  31. Arata S., Hayashi K., Nishio Y., Kobayashi A., Nakazato K., and Niitsu K., "Wafer-scale development and experimental verification of 0.36-mm^2 228-mV open-circuit-voltage solid-state CMOS-compatible glucose fuel cell for healthcare IoT application", Japanese Journal of Applied Physics, vol.57, no.4S, pp.04FM04, Mar. 2018.  

  32. Matsunaga M., Kobayashi A., Nakazato K., and Niitsu K., "Design Trade-Off between Spatial Resolution and Power Consumption in CMOS Biosensor Circuit Based on Millimeter-Wave LC-Oscillator Array", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC02, Jan. 2018.     

  33. Nakanishi T., Matsunaga M., Kobayashi A., Nakazato K., and Niitsu K., "A 40-GHz fully integrated circulating tumor cell analysis vector network analyzer in 65-nm CMOS technology with coplanar-line-based detection area", Japanese Journal of Applied Physics, vol.57, no.3S2, pp.03EC01,  Jan. 2018.   

  34. Itakura K., Kayano K., Nakazato K., and Niitsu K., "Theoretical Analysis and Simulation Study of Low-Power CMOS Electrochemical Impedance Spectroscopy Biosensor in 55nm DDC Technology for Cell-State Monitoring", Japanese Journal of Applied Physics, vol.57, no.1S, pp.01AG02, Jan. 2018. 

  35. Kobayashi A., Ikeda K, Ogawa Y., Kai H, Nishizawa M., Nakazato K., and Niitsu K., "Design and Experimental Verification of 0.19 V 53 μW 65 nm CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter for a Self-Powered Bio-Sensing Using a Biofuel Cell", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.11, no.6, pp.1313-1323, Dec. 2017. 

  36. Nakazato K., and Niitsu K., "Biosensor integrated circuits using CMOS technology",Institute of Electrical Engineers of Japan,vol.137, no.10, pp.291-215, 2017

  37. Ikeda K., Kobayashi A., Nakazato K., and Niitsu K., "Design and Electrochemical Measurement of a Current-Mode Analog-to-Time Converter with Short-Pulse Output Capability Using Local Intra-Cell Activation for High-Speed Time-Domain Biosensor Array", Analog Integrated Circuits and Signal Processing (ALOG), vol.92, no.3, pp.403-413, Jun. 2017. 

  38. Gamo K., Nakazato K., and Niitsu K., "A Current-Integration-Based CMOS Amperometric Sensor with 1024 × 1024 Bacteria-Sized Microelectrode Array for High-Sensitivity Bacteria Counting", IEICE Transactions on Electronics, Vol.E100-C, No.6, pp.602-606, Jun. 2017.   

  39. Ikeda K., Kobayashi A., Nakazato K., and Niitsu K., "Design and Analysis of Scalability in Current-Mode Analog-to-Time Converter for an Energy-Efficient and High-Resolution CMOS Biosensor Array", IEICE Transactions on Electronics, vol.E100-C, no.6, pp.597-601, Jun. 2017. 

  40. Yamaji Y., Nakazato K., and Niitsu K., "Sub-1-V CMOS-Based Electrophoresis Using Electroless Gold Plating for Small-Form-Factor Biomolecule Manipulation", IEICE Transactions on Electronics, vol.E100-C, no.6, pp.592-596, Jun. 2017.

  41. Niitsu K., Ikeda K., Muto K., and Nakazato K., "Design, Experimental Verification, and Analysis of a 1.8-V-Input-range Voltage-to-Current Converter Using Source Degeneration for Low-Noise Multimodal CMOS Biosensor Array", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH06, Jan. 2017. 

  42. Niitsu K., Kobayashi A., Yoshida K., and Nakazato K., "Design and experimental verification of CMOS Magnetic-Based Microbeads Detection Using an Asynchronous Intra-chip Inductive-Coupling Transceiver", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH05, Jan. 2017.

  43. Niitsu K., Ando T., and Nakazato K., "Enhancement in open-circuit voltage of implantable CMOS-compatible glucose fuel cell by improving the anodic catalyst", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH04, Jan. 2017. 

  44. Kobayashi A., Ikeda K., Nakazato K., and Niitsu K., "Energy-efficient and low-voltage design methodology for a supply-sensing CMOS biosensor using biofuel cells for energy-autonomous healthcare applications", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH03, Jan. 2017.   

  45. Gamo K., Nakazato K., and Niitsu K., "Design, theoretical analysis, and experimental verification of a CMOS current integrator with 1.2 × 2.05 µm2 microelectrode array for high-sensitivity bacterial counting", Japanese Journal of Applied Physics, vol.56, no.1S, pp.01AH01, Jan. 2017. 

  46. Niitsu K., Kuno T., Takihi M., and Nakazato K., "Well-Shaped Microelectrode Array Structure for High-Density CMOS Amperometric Electrochemical Sensor Array", IEICE Transactions on Electronics, vol.E99-C, no.6, pp.663-666, Jun. 2016.

  47. Niitsu K., Yoshida K., and Nakazato K., "Design and experimental demonstration of low-power CMOS magnetic cell manipulation platform using charge recycling technique", Japanese Journal of Applied Physics, vol.55, no.3S2, 03DF13 (4 pages), Feb. 2016.

  48. Tanaka S., Niitsu K., and Nakazato K., "A Low-Power Inverter-Based CMOS Level-Crossing A/D Converter for Low-frequency Biosignal Sensing ", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF10, Feb. 2016.   

  49. Yamaji Y., Niitsu K., and Nakazato K., "Design and Experimental Verification of Low-Voltage Two-Dimensional CMOS Electrophoresis Platform with 32×32 Sample/Hold Cell Array", Japanese Journal of Applied Physics, vol.55, no.3S2, pp.03DF07, Feb. 2016. 

  50. Niitsu K., Ota S., Gamo K., Kondo H., Hori M., and Nakazato K., "Development of Microelectrode Arrays Using Electroless Plating for CMOS-Based Direct Counting of Bacterial and HeLa Cells", IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), vol.9, no.5, pp.607-619, Nov. 2015. 

  51. Niitsu K., Osawa Y., Hirabayashi D., Kobayashi O., Yamaguchi T. J., and Kobayashi H., "A CMOS PWM Transceiver Using Self-Referenced Edge Detection", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.23, no.6, pp.1145-1149. Jun. 2015. 

  52. Ishihara H., Niitsu K., and Nakazato K., "Analysis and Experimental Verification of DNA Single Base Polymerization Detection Using CMOS FET-Based Redox Potential Sensor Array", Japanese Journal of Applied Physics, vol.54, no.4S, pp.04DL05, Mar. 2015.

  53. Osawa Y., Hirabayashi D., Harigai N., Kobayashi H. Kobayashi O., Tsuji M., Umeda S., Shiota R., Dobashi N., Watanabe M., Matsuura T., Niitsu K., Shimizu I., Takai N., and Yamaguchi T. J., "Phase Noise Measurement and Testing with Delta-Sigma TDC", Key Engineering Materials, vol.643, pp.149-156, May. 2015. 
    DOI: 10.4028/www.scientific.net/KEM.643.149

  54. Jin G., Chen H., Gao C., Zhang Y., Li M., Kobayashi H., Wu S., Takai N., Niitsu K., and Hadidi K., "Digital Auto-Tuning for Center Frequency and Q-Factor of Gm-C Band-Pass Filter", Key Engineering Materials, vol.Advanced Micro-Device Engineering V, vol.643, pp.123-130, May. 2015.
    DOI: 10.4028/www.scientific.net/KEM.643.123

  55. Niitsu K., Harigai N., Yamaguchi T. J., and Kobayashi H., "A Low-Offset Cascaded Time Amplifier with Reconfigurable Inter-Stage Connection", IEICE Electronics Express, vol.11, no.10, pp.20140203, May. 2014. 

  56.  Tsuyoshi Kuno, Niitsu K., and Nakazato K., "Amperometric Electrochemical Sensor Array for On-Chip Simultaneous Imaging", Japanese Journal of Applied Physics, vol.53, pp.04EL01, Feb. 2014. 

  57. Niitsu K., Sakuma K., Harigai N., Hirabayashi D., Takai N., Yamaguchi T. J., and Kobayashi H., "Design Methodology and Jitter Analysis of a Delay Line for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.596, pp.176-180, Jan. 2014. 

  58. Niitsu K., Harigai N., Hirabayashi D., Sakurai M., Yamaguchi T. J., and Kobayashi H., "Analysis on a Cascaded Structure in Open-Loop Time Amplifier for High-Speed Operation", Key Engineering Materials, vol.596, pp.171-175, Jan. 2014.

  59. Tan Y., Oki D., Liu Y., Arai Y., Nosker Z., Kobayashi H., Kobayashi O., Matsuura T., Yang Z., Katayama A., Quan L., Li E., Niitsu K., and Takai N., "Self-Calibration Techniques of Pipeline ADCs Using Cyclic Configuration", Key Engineering Materials, vol.596, pp.181-186, Jan. 2014. 

  60. Uemori S., Ishii M., Kobayashi H., Hirabayashi D., Arakawa Y., Doi Y., Kobayashi O., Matsuura T., Niitsu K., Yano Y., Gake T., Yamaguchi T. J., and Takai N., “Multi-bit Sigma-Delta TDC Architecture with Improved Linearity”, Journal of Electronic Testing : Theory and Applications, vol.29, no.6, pp.879-892, Dec. 2013.

  61. Niitsu K., Harigai N., and Kobayashi H., "Design Methodology for Determining the Number of Stages in a Cascaded Time Amplifier to Minimize Area Consumption", IEICE Electronics Express, vol.10, no.11, pp.20130289, Jun. 2013.

  62. Niitsu K., Harigai N., Yamaguchi T. J., and Kobayashi H., "A Feed-Forward Time Amplifier Using Phase Detector and Variable Delay Line", IEICE Transactions on Electronics, vol.E96-C, no.6, pp.920-922, Jun. 2013. 

  63. Kato K., Abe F., Wakabayashi K., Gao C., Yamada T., Kobayashi H., Kobayashi O., and Niitsu K., "Two-Tone Signal Generation  for ADC Testing", IEICE Transactions on Electronics, vol.E96-C, no.6, pp.850-858, Jun. 2013. 

  64. Nosker Z., Kobori Y., Kobayashi H., Niitsu K., Takai N., Oomori T., Odaguchi T., Nakanishi I., Nemoto K., Matsuda J., "A Small, Low Power Boost Regulator Optimized for Energy Harvesting Applications", Analog Integrated Circuits and Signal Processing, vol.75, no.2, pp.207-216, Apr. 2013.

  65. Niitsu K., Sakurai M., Harigai N., Hirabayashi D., Oki D., Yamaguchi T. J., and Kobayashi H., "An Analytical Study on Jitter Accumulation in Interleaved Phase Frequency Detectors for High-Accuracy On-Chip Jitter Measurements", Key Engineering Materials, vol.534, pp.197-205, Jan. 2013.

  66. Nosker Z., Kobori Y., Kobayashi H., Niitsu K., Takai N., Oomori T., Odaguchi T., Nakanishi I., Nemoto K., Matsuda J., "A High Efficiency, Extended Load Range Boost Regulator Optimized for Energy Harvesting Applications", Key Engineering Materials, vol.534, pp.206-219, Jan. 2013. 

  67. Niitsu K., Sakurai M., Harigai N., Yamaguchi T. J., and Kobayashi H., "CMOS Circuits to Measure Timing Jitter Using a Self-Referenced Clock and a Cascaded Time Difference Amplifier with Duty-Cycle Compensation", IEEE Journal of Solid-State Circuits (JSSC), vol.47, no.11, pp.2701-2710, Nov. 2012.

  68. Wakabayashi K., Kato K., Yamada T., Kobayashi O., Kobayashi H., Abe F., and Niitsu K., "Low-Distortion Sinewave Generation Method Using Arbitrary Waveform Generator", Journal of Electronic Testing: Theory and Applications, vol.28, no.5, pp.641-651, Oct. 2012.

  69. Niitsu K., Kawai S., Miura N., Ishikuro H., and Kuroda T., "A 65fJ/b Inter-Chip Inductive-Coupling Data Transceivers Using Charge-Recycling Technique for Low-Power Inter-Chip Communication in 3-D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.20, no.7, pp.1285-1294, Jul. 2012. 

  70. Ye J., Nosker Z., Wakabayashi K., Yagi T., Yamamoto O., Takai N., Niitsu K., Kato K., Ootsuki T., Akiyama I., and Kobayashi H., "Architecture of High-Efficiency Digitally-Controlled Class-E Power Amplifier", Key Engineering Materials, vol.487, pp.285-295, Dec. 2011.

  71. Niitsu K., Kang S., Kulkarni V. V., Ishikuro H., and Kuroda T., "A 14 GHz AC-Coupled Clock Distribution Scheme with Phase Averaging Technique Using Sigle LC-VCO and Distributed Phase Interpolators", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.11, pp.2058-2066, Nov. 2011. 

  72. Niitsu K., Sugimori Y., Kohama Y., Osada K., Irie N., Ishikuro H., and Kuroda T., "Analysis and Techniques for Mitigating Interference from Power/Signal Lines and to SRAM Circuits in CMOS Inductive-Coupling Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.19, no.10, pp.1902-1907, Oct. 2011.

  73. Ogawa T., Kobayashi H., Uemori S., Tan Y., Ito S., Takai N., Yamaguchi T. J., and Niitsu K., "Design for Testability That Reduces Linearity Testing Time of SAR ADCs”, IEICE Transactions on Electronics, vol.E94-C, no.6, pp.1061-1064, Jun. 2011. 

  74. Niitsu K., Kohama Y., Sugimori Y., Kasuga K., Osada K., Irie N., Ishikuro H., and Kuroda T., "Modeling and Experimental Verification of Misalignment Tolerance in Inductive-Coupling Inter-Chip Link for Low-Power 3D System Integration", IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol.18, no.8, pp.1238-1243, Aug. 2010. 

  75. Saen M., Osada K., Okuma Y., Niitsu K., Shimazak Y., Sugimori Y., Kohama Y., Kasuga K., Nonomura I., Irie N.,  Hattori T., Hasegawa A., and Kuroda T., "3-D System Integration of Processor and Multi-Stacked SRAMs Using Inductive-Coupling Link", IEEE Journal of Solid-State Circuits (JSSC), vol.45, no.4, pp.856-862, Apr. 2010. 

  76. Niitsu K., Yuxiang Y., Ishikuro H., and Kuroda T., "A 33% Improvement in Efficiency of Wireless Inter-Chip Power Delivery by Thin Film Magnetic Material for Three-Dimensional System Integration", Japanese Journal of Applied Physics, vol.48, pp.04C073, Apr. 2009. 

  77. Kulkarni V. V., Muqsith M., Niitsu K., Ishikuro H. and Kuroda T., "A 750 Mb/s, 12 pJ/b, 6-to-10 GHz CMOS IR-UWB Transmitter With Embedded On-Chip Antenna", IEEE Journal of Solid-State Circuits (JSSC), vol.44, no.2, pp.394-403, Feb. 2009. 

  78. Miura N., Ishikuro H., Niitsu K., Sakurai T., and Kuroda T., "A 0.14pJ/bit Inductive-Coupling Transceiver with Digitally-Controlled Precise Pulse Shaping", IEEE Journal of Solid-State Circuits (JSSC), vol.43, no.1, pp.285-291, Jan. 2008. 

  79. Niitsu K., Miura N., Inoue M., Nakagawa Y., Tago M., Mizuno M., Sakurai T., and Kuroda T., "Daisy Chain Transmitter for Power Reduction in Inductive-Coupling CMOS Link”, IEICE Transactions on Electronics, vol.E90-C, no.4, pp.829-835, Apr. 2007. 

  80. Niitsu K., Miura N., Inoue M., Nakagawa Y., Tago M., Mizuno M., Ishikuro H., and Kuroda T., "60% Power Reduction in Inductive-Coupling Inter-Chip Link by Current-Sensing Technique", Japanese Journal of Applied Physics, vol.46, no.4B, pp.2215-2219, Apr. 2007. 

  81. Miura N., Mizoguchi D., Inoue M., Niitsu K., Nakagawa Y., Tago M., Mizuno M, Sakurai T., and Kuroda T., "A 1Tb/s 3W Inductive-Coupling Transceiver for 3D-Stacked Inter-Chip Clock and Data Link", IEEE Journal of Solid-State Circuits (JSSC), vol.42, no.1, pp.111-122, Jan. 2007.    

< International Conference Papers (国際会議発表論文)  >
72mWContinuo us Glucose MonitoringChipset Usinga 0.17m2 72mW Transmitter and a 0.7
mm2 80mW Direct-Conversion Receiver
  1. Hiroaki Kitaike, Hironori Tagawa, Shufan Xu, Ruilin Zhang, Kunyang Liu, and Kiichi Niitsu, "Design of 0.9-2.6pW 0.1-0.25V 22nm 2-bit Supply-to-Digital Converter Using Always-Activated Supply-Controlled Oscillator and Supply-Dependent-Activation Buffers for Bio-Fuel-Cell-Powered-and-Sensed Time-Stamped Bio-Recording", ACM/IEEE Asia and South Pacific Design Automation Conference (ASP-DAC),  Jan. 2025.
  2. Hiroaki Kitaike, Hironori Tagawa, Masaya Kaneko, Jin Nakamura, Shufan Xu, Ruilin Zhang, Kunyang Liu, Hiroki Wakatsuchi, Kyoya Takano, Hirofumi Shinohara, and Kiichi Niitsu, "A 0.00027 mm2 1.2V 0.089pJ/bit 10Gbps 41.6 GHz Standard-Cell-Based Passive-Less Wireless OOK Transmitter with On-Chip Antenna in 12nm FinFET", IEEE Nordic Circuits and Systems Conference (NorCAS), Oct. 2024.
  3. You Wu, Kei Awano, Kento Okamura, Teruaki Ono, Kohei Sakamoto, Hiroaki Kitaike, Hironori Tagawa, Jin Nakamura, Masaya Kaneko, Yuta Kimura, Hiroaki Nakamura, Shufan Xu, Ruilin Zhang, Kunyang Liu, Hirofumi Shinohara, and Kiichi Niitsu, "A 2 Hz, 1.2-2 V, 0.22-9 nW, 0.007 mm2 65 nm CMOS Multiple-Output Down-Converter-Less Clock Generator Using Stacked a Ring Oscillator and Frequency Dividers for Scaling-Friendly IoTs", IEEE Nordic Circuits and Systems Conference (NorCAS), Oct. 2024.
  4. Yoshiki Kiyobayashi, Hiroaki Kitaike, Jin Nakamura, Masaya Kaneko, Hironori Tagawa, Kento Okamura,  Kei Awano, You Wu, Teruaki Ono,  Kohei Sakamoto, Shufan Xu, Hiroaki Nakamura, Yuta Kimura, Kunyang Liu, Ruilin Zhang, Hirofumi Shinohara and Kiichi Niitsu, "A 115mV 300fW 0.24Hz 0.00012mm2 Schmitt-Trigger Ring Oscillator Using Dynamic Leakage Suppression with Cold Start Capability in 22nm CMOS", IEEE International Conference on Electronics, Circuits and Systems (ICECS 2024), Nov. 2024.
  5. Mitsuru Terauchi, Hiroaki Kitaike, Hironori Tagawa and Kiichi Niitsu, "A 0.04 mm^2 22nm CMOS Fully-Integrated Supply-Modulated OOK Transmitter Using Self-Oscillating Voltage Doubler, Charge Pump, and Voltage Detector", IEEE International Conference on Electronics, Circuits and Systems (ICECS 2024), Nov. 2024.
  6. Ruilin Zhang, Haochen Zhang, Xingyu Wang, Ye Ziyang, Kunyang Liu, Shinichi Nishizawa, Kiichi Niitsu, and Hirofumi Shinohara, "De-correlation and De-bias Post-processing Circuits for True Random Number Generator", IEEE International Symposium on Integrated Circuits and Systems  (ISICAS 2024), Oct. 2024.
  7. Hiroaki Kitaike, Masaharu Inada, Mitsuru Terauchi, Hironori Tagawa, Ryosuke Nagai, Shufan Xu, Ruilin Zhang, Kunyang Liu, and Kiichi Niitsu, "A 0.9-2.6pW 0.1-0.25V 22nm 2-bit Supply-to-Digital Converter Using Always-Activated Supply-Controlled Oscillator and Supply-Dependent-Activation Buffers for Bio-Fuel-Cell-Powered-and-Sensed Time-Stamped Bio-Recording", IEEE Symposium on VLSI Technology and Circuits (VLSI 2024), pp. 1-2,  Jun.2024.
    DOI:10.1109/VLSITECHNOLOGYANDCIR46783.2024.10631372
  8. Ruilin Zhang, Xiaoyang Jun, Jiawei Liu, Xingyu Wang, Shufan Xu, Kunyang Liu, Shinichi Nishizawa, Kiichi Niitsu and Hirofumi Shinohara, "A Latch-based Stochastic Number Generator for Stochastic Computing of Extended Naïve Bayesian Network," IEEE International Symposium on VLSI Design, Automation and Test (VLSI-DAT 2024), Apr.2024.
    DOI:    10.1109/VLSITSA60681.2024.10546408
  9.  Kiichi Niitsu, "A Stand-Alone Continuous Glucose Monitoring Contact Lens Using Glucose-Fuel Cell and CMOS LSI Enabling Memory And Passive-Wireless Readout With Hypoglycemia Predictive Alert", 17th International Conference on Advanced Technologies & Treatments for Diabetes (ATTD 2024), Mar. 2024.
  10. Hiroaki Kitaike, Masaharu Inada, Mitsuru Terauchi, Hironori Tagawa, Ryosuke Nagai, Shufan Xu, Ruilin Zhang, Kunyang Liu, and Kiichi Niitsu, IEEE International Solid-State Circuits Conference (ISSCC 2024) Student Research Preview, Feb.2024.
  11. Kiichi Niitsu, Koki Fukushima, Yuichi Hiraoka, Hidenori Urawa, Yuya Osaki, Masaya Kaneko, Jin Nakamura, Hideo Yoshikawa, and Yutaka Ozawa, "A 65-nm CMOS Millimeter-Wave Ear-Worn Non-Invasive Continuous Glucose Monitoring Chipset Using a 0.17mm² 72mW Transmitter and a 0.75mm² 80mW Direct-Conversion Receiver", IEEE Latin American Symposium on Circuits and Systems (LASCAS 2024), Feb. 2024.
    DOI:10.1109/LASCAS60203.2024.10506119
  12. Guowei Chen, Akiyoshi Tanaka, and Kiichi Niitsu, "A 0.37 V 126 nW 0.29 mm2 65-nm CMOS Biofuel-Cell-Modulated Biosensing System Featuring an FSK-PIM-Combined 2.4 GHz Transmitter for Continuous Glucose Monitoring Contact Lenses", Asia and South Pacific Design Automation Conference (ASP-DAC 2024), Jan. 2024.
  13. Ryosuke Nagai, Masaharu Inada, Hiroaki Kitaike, Hiroki Tagawa, Mitsuru Terauchi, Tran Minh Quan, Hiroaki Nakamura, and Kiichi Niitsu, “A Continuous Multiple-Timestep Blood Glucose Level Prediction System Using Stacked LSTM for High-Accuracy Hypoglycemia Alerting in Smart Contact Lenses”, IEEE International Conference on Data Science and Engineering in Healthcare, Medicine & Biology (DSEHMB 2023), Dec. 2023.
  14. Akiyoshi Tanaka, Guowei Chen, and Kiichi Niitsu, "A 0.063-mm^2 1.75-nW Biofuel Cell-Input Biosensing/Data-Storing System with 5.5-GHz Wireless Backscatter Data-Readout in 65-nm CMOS for Self-Powered Smart Contact Lenses", IEEE Biomedical Circuits and Systems Conference(BioCAS 2023), Oct. 2023.
    DOI:10.1109/BioCAS58349.2023.10388802
  15. Kiichi Niitsu, Jin Nakamura, Masaya Kaneko, Yuya Osaki and Hiroki Wakatsuchi, "A 351pW Stand-By Power 0.017mm2 37.4GHz LC Oscillator-Based OOK Transmitter Using Low-Leakage Switch in 22nm Planer CMOS", International Conference on Solid State Devices and Materials (SSDM2023), Sep.2023.
  16. Guowei Chen, Akiyoshi Tanaka and Kiichi Niitsu, "A Battery-Less 0.37 V 126 nW 0.29 mm2 65-nm CMOS Biofuel-Cell-Modulated Biosensing System Featuring an FSK-PIM-Combined 2.4 GHz Transmitter for Continuous Glucose Monitoring Contact Lenses," 2023 IEEE International Symposium on Circuits and Systems (ISCAS 2023), pp.1-5, May.2023.
    DOI:10.1109/ISCAS46773.2023.10182119
  17. Hayashi and Kiichi Niitsu, "A 22nm CMOS 1.25V 29pW 0.000013 mm2 Supply Voltage Detector Using Stacked 3 Thick-Gate-Oxide PMOSs and Dynamic Leakage Suppression Buffer", International Conference on Solid State Devices and Materials (SSDM 2022), Sep. 2022.
  18. Akiyoshi Tanaka, Guowei Chen, and Kiichi Niitsu, “A 4.5-mW 22-nm CMOS Label-Free Frequency-Shift 3×3×2 3D Biosensor Array Using Vertically-Stacked 60-GHz LC Oscillators,” IEEE International Symposium on Integrated Circuits and Systems  (ISICAS 2022), Oct.2022.
    DOI:10.1109/TCSII.2022.3185542　　　　　　　　　　　     　　　　　　　　　　　　　　　　　　　　　　
  19. Shinichi Ito, Akiyoshi Tanaka, Guowei Chen, Xujiaming Chen and Kiichi Niitsu, "A 0.00023 mm2 1.2V 0.48mW 18GHz Passive-Less Digital Wireless Transmitter with On-Chip Antenna in 22nm Bulk CMOS," 2022 IEEE 65th International Midwest Symposium on Circuits and Systems (MWSCAS 2022), pp.1-2, Aug.2022
    DOI: 10.1109/MWSCAS54063.2022.9859365                                                               
  20. Akiyoshi Tanaka, Guowei Chen and Kiichi Niitsu, “A 4.8-mW Label-free Frequency-shift 3×3×2 3D Biosensor Array with Vertically-stacked60-GHz LC Oscillators in 22-nm CMOS”, 2022 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS 2022), Aug. 2022.
    DOI: 10.1109/MWSCAS54063.2022.9859351 
  21. Takuya Tsujimura, Guowei Chen, Yuma Hayashi, Sora Kato and Kiichi Niitsu, “Design of Wideband CMOS Biosensor with Active-Inductor-Based VCO for DetectingCTCs and Exosomes”, ISPlasma2022/IC-PLANTS2022, Mar. 2022.
  22. Takuya Tsujimura and Kiichi Niitsu, “CMOS-Based Biosensor Using Broadband Tunable Active-Inductor-Based VCO with γ-Dispersion for Detecting CTCs and Exosomes”,IEEE Latin American Symposium on Circuits and Systems (LASCAS 2022), Mar. 2022.
  23. Huy Duong, Guowei Chen and Kiichi Niitsu, “22nm CMOS pW Standby Power Flip-Flops with/without Security using Dynamic Leakage Suppression Logic," 2022 IEEE 13th Latin American Symposium on Circuits and Systems (LASCAS 2022), pp.1-4,  Mar.2022.
    DOI: 10.1109/LASCAS53948.2022.9789041  
  24. Kato Sora, Chen Guowei and Kiichi Niitsu, “An Ultra-Low Power 22 nm Self-Oscillating Voltage Doubler With Dynamic Leakage-Suppression Logic,” 2022 IEEE 13th Latin American Symposium on Circuits and Systems (LASCAS 2022), pp.1-3, Mar.2022.
    DOI: 10.1109/LASCAS53948.2022.9789081
  25. Xujiaming Chen, Guowei Chen, Xinyang Yu, Yue Wang and Kiichi Niitsu, “A 52.3% Peak Efficiency 22nm CMOS Low-Power Light-Adaptive Self-Oscillating Voltage Doubler Using Scalable Dynamic Leakage-Suppression Logic,” 2022 IEEE 13th Latin American Symposium on Circuits and Systems (LASCAS 2022), pp.1-4, Mar.2022.
    DOI: 10.1109/LASCAS53948.2022.9789056                                                  　         
  26. Guowei Chen, Xinyang Yu, Yue Wang, Tran Minh Quan, Naofumi Matsuyama, Takuya Tsujimura and Kiichi Niitsu, "A 0.5 mm2 Ambient Light-Driven Solar Cell-Powered Biofuel Cell-Input Biosensing System with LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens," 2022 27th Asia and South Pacific Design Automation Conference (ASP-DAC 2022), pp.1-2, Jan.2022.
    DOI:10.1109/ASP-DAC52403.2022.9712523
  27. Yuma Hayashi, Guowei Chen, Kiichi Niitsu, ”A FSK Wireless Transmitter in 22-nm CMOS for Biomedical Applications with On-Chip Photodiode,” IEICE International Conference on Emerging Technologies for Communications (ICETC), p.1, Dec. 2021, 
    DOI:10.34385/proc.68.P4-1
  28. Akiyoshi Tanaka, Guowei Chen and Kiichi Niitsu, “A 0.2V 0.97nW 0.011mm^2 Fully-Passive mHBC Tag Using Intermediate Interference Modulation in 65nm CMOS,” 2021 28th IEEE International Conference on Electronics, Circuits & Systems (ICECS 2021), Paper.2157, pp.1-5, Nov.2021.
    DOI:10.1109/ICECS53924.2021.9665542
  29. Akiyoshi Tanaka, Guowei Chen and Kiichi Niitsu, “A 4.8mW 22nm CMOS Fully-Integrated 60-GHz 3×3×2 3D Frequency-Shift Biosensor Array Using Vertically-Stacked LC Oscillators,” 2021 28th IEEE International Conference on Electronics, Circuits & Systems (ICECS 2021), Paper.2203, pp.1-4, Nov. 2021.
    DOI:10.1109/ICECS53924.2021.9665493
  30. Xinyang Yu, Guowei Chen, Yue Wang, Xujiaming Chen and Kiichi Niitsu, "A 65-nm CMOS 0.4 V 49.6 nW Voltage Monitor for Small-Form-Factor Biomedical IoT Applications," 2021 IEEE Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics (PrimeAsia 2021), pp.9-12, Sep.2021. 
    DOI: 10.1109/PrimeAsia51450.2021.9701468
  31. Yue Wang, Guowei Chen, Xinyang Yu, Xujiaming Chen and Kiichi Niitsu, "A 22nm CMOS 0.2V 13.3nW 16T SRAM Using Dynamic Leakage Suppression and Half-Selected Free Technique," 2021 IEEE Asia Pacific Conference on Circuits and Systems  (APCCAS 2021), pp.29-32, Sep.2021.
    DOI:10.1109/APCCAS51387.2021.9687693
  32. Guowei Chen, Xinyang Yu, Yue Wang, Tran Minh Quan, Naofumi Matsuyama, Takuya Tsujimura, Md. Zahidul Islam and Kiichi Niitsu, "A 0.5 mm2 0.31 V/0.39 V 28 nW/144 nW 65 nm CMOS Solar Cell-Powered Biofuel Cell-Input Biosensing System with PIM/PDM LED Driving for Stand-Alone RF-Less Continuous Glucose Monitoring Contact Lens," IEEE 47th European Solid State Circuits Conference (ESSCIRC 2021),  pp.171-174, Sep.2021.
    DOI: 1109/ESSCIRC53450.2021.9567771,10.1109/ESSDERC53440.2021.9631770
  33. Jodo Shota and Niitsu Kiichi, "Design of CMOS Gate Driver Circuit for Power Devices with Smaller Switching Loss Using Bootstrap Technique," ISPlasma2021, Mar. 2021.
  34. Shunya Murakami, Takuya Tsujimura, Guowei Chen, Md. Zahidul Islam and Kiichi Niitsu, "Simulation Comparison of Two Tyeps of CMOS-Based Biosensors for Detecting CTCs and Exosomes," ISPlasma2021, Jan. 2021.
  35. Takuya Tsujimura, Shunya Murakami, Guowei Chen, Md. Islam, and Kiichi Niitsu, "Design and Simulation of 33 GHz 65-nm-CMOS Small-Formfactor Direct-Conversion Receiver for Non-Invasive Continuous Glucose Monitoring," ISPlasma2021, Jan. 2021.
  36. Guowei Chen, Dang Bui, Xin Yang Yu, Md. Zahidul Islam, Atsuki Kobayashi and Kiichi Niitsu, "A 72-nW 440-mV Time Register Using Stacked-NMOS-Switched Gated Delay Cell in Biomedical Applications," 2020 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2020), pp.220-223, Oct.2020.
    DOI:10.1109/APCCAS50809.2020.9301716
  37. Kosuke Uchiyama, Guowei Chen and Kiichi Niitsu, "Design of Fully-Integrated Self-Powered FM Transmitter Using On-Chip Photodiodes in 65-nm CMOS," 2020 27th IEEE International Conference on Electronics, Circuits & Systems (ICECS 2020), pp.1-2, Nov.2020.
    DOI:10.1109/ICECS49266.2020.9294962
  38. SutongYe, Atsuki Kobayashi, Guowei Chen and Kiichi Niitsu, "Simulation Study of Full Passive Magnetic Human Body Communication in 65-nm CMOS Technology  for Temperature Sensing Application," 2020 27th IEEE International Conference on Electronics, Circuits & Systems (ICECS 2020), pp.1-2, Nov.2020.
    DOI:10.1109/ICECS49266.2020.9294816
  39. Takuya Tsujimura and Kiichi Niitsu, "Design of 33 GHz 65-nm-CMOS Small-Formfactor Direct-Conversion Receiver for Non-Invasive Continuous Glucose Monitoring," 2020 27th IEEE International Conference on Electronics, Circuits & Systems (ICECS 2020), pp.1-2, Nov.2020.
    DOI:10.1109/ICECS49266.2020.9294895
  40. Shunya Murakami,Takuya Tsujimura and Kiichi Niitsu, "Widely Tunable CMOS-Based Biosensor with an Active-Inductor-Based VCO for Detecting CTCs and Exosomes," 2020 27th IEEE International Conference on Electronics, Circuits & Systems (ICECS 2020), pp.1-2, Nov.2020.
    DOI: 10.1109/ICECS49266.2020.9294845
  41. Atsuki Kobayashi and Kichi Niitsu “Low-Voltage Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS,” in Proc. IEEE International Symposium on Integrated Circuits and Systems (ISICAS 2020), Aug.2020.
  42. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi and Kiichi Niitsu, "Biomedical Application Via Implantable Devices By CMOS-Compatible Glucose Fuel Cells Using Carbon Nano Horn" in proc. International Meeting on Chemical Sensors (IMCS 2020), May.2020.
  43. Taiki Nakanishi, Shunya Murakami, Huseyin Ozgur Kazanci, Atsuki Kobayashi, Md. Zahidul Islam and Kiichi Niitsu, "A Widely Tunable CMOS VCO With an Actuve Inductor for Analyzing CTCs"  in proc. 12th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials (ISPlasma2020), Mar.2020 (Nagoya).
  44. Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Atsuki Kobayashi and Kiichi Niitsu, "Fully-Integrated Supply-Modulated OOK Transmitter for Self-Powered, Fuel-CellEmbedded, and Low-Cost Continuous Glucose Monitoring Contact Lens" in proc. 12th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials (ISPlasma2020), Mar.2020 (Nagoya).
  45. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi,Yuichi Momoi and, Kiichi Niitsu, ”Wearable devices for biosensing applications via CMOS compatible glucose fuel cell fabricated by carbon nanohorns",in proc. 12th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials (ISPlasma2020), Mar.2020 (Nagoya).
  46. Sitong Ye, Kiichi Niitsu, ” Simulation Study of Full Passive Magnetic Human Body Communication in 65-nm CMOS Technology",in proc. 12th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials (ISPlasma2020), Mar.2020 (Nagoya).
  47. Shota Jodo, Toshihiro Iwaki, Kosuke Uchiyama, Md.Zahidul Islam, Jun Imaoka, Masayoshi Yamamotoand, Kiichi Niitsu, ”A 180-nm CMOS Gate DriverUsing BootstrapTechniqueWith ShortSlew Ratefor13.56-MHzGaN-Based Power Electronics Applications",in proc. 12th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials (ISPlasma2020), Mar.2020 (Nagoya).
  48. Kosuke Uchiyama, Shota Jodo, Shunya Murakami, Md.Zahidul Islam, Atsuki Kobayashi and Kiichi Niitsu, "Design of Solar-Cell-Powered CMOS Image Sensor Array for Energy-Autonomous Optical Imaging Application" in proc. 12th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials (ISPlasma2020), Mar.2020 (Nagoya).
  49. Shunya Murakami, Taiki Nakanishi,  Atsuki Kobayashi, Md. ZahidulIslam, and Kiichi Niitsu, "LC-Voltage-Controlled-Oscillator-Based Biosensor in 180-nm CMOS Process Targeting β-Dispersion for Detecting Exosomes," 2019 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2019), pp.101-104, Nov.2019.
    DOI:10.1109/APCCAS47518.2019.8953109
  50. Atsuki Kobayashi, Kenya Hayashi, Shigeki  Arata, Ge Xu, Shunya. Murakami, Cong Dang Bui, Tran Minh Quan, Md. Zahidul Islam, Kiichi Niitsu, "A Solar-Cell-Assisted, 99.66% Biofuel Cell Area Reduced, Biofuel-Cell-Powered Wireless Biosensing System in 65-nm CMOS for Continuous Glucose Monitoring Contact Lenses," 2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2019), pp.61-64, Nov.2019. (Genova Italia)
    DOI:10.1109/ICECS46596.2019.8965102
  51. Syunya Murakami, Taiki Nakanishi, Atsuki Kobayashi, Md. Zahidul Islam, Kiichi Niitsu, "Verification of Inductive-Coupling-Based CMOS Biosensor Focusing Dielectric Loss of β-Dispersion for Detecting Exosomes Through Electromagnetic Simulation," 2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2019), pp.119-120, Nov.2019. (Genova Italia)
    DOI:10.1109/ICECS46596.2019.8964844
  52. Taiki Nakanishi, Shunya Murakami, Atsuki Kobayashi, Md. Zahidul Islam, and Kiichi Niitsu  "A 40-GHz Fully-Integrated CMOS-Based Biosensor Circuit With an On-Chip Vector Network Analyzer for Circulaitng Tumor Cells Analysis," 2019 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC), pp.1-7, Oct.2019.
    DOI: 10.1109/NORCHIP.2019.8906936
  53. Atsuki Kobayashi, Kenya Hayashi, Shigeki Arata, Shunya Murakami, Ge Xu, Md. Zahidul Islam, and Kiichi Niitsu, "A 2.1-nW Burst-Pulse-Counting Supply Voltage Monitor for Biofuel-Cell-Combined Biosensing Systems in 180-nm CMOS," 2019 IEEE Biomedical Circuits and Systems Conference (BioCAS 2019), pp.1-4, Oct.2019.
    DOI:10.1109/BIOCAS.2019.8918978
  54. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi, Yuichi Momoi and Kiichi Niitsu, "1D structural CNH dependency in needle type Solid-state CMOS compatible glu-cose Fuel Cell for open-circuit voltage and their biomedical application", in Proc. 2019 international Conference on Solid State Devices and Materials (SSDM 2019), Sep.2019.
  55. Shunya Murakami, Taiki Nakanishi,  Atsuki Kobayashi, Md. Zahidul Islam, Kiichi Niitsu, "Design of Inductive-Coupling-Based CMOS Biosensor Focusing Dielectric Loss of βDispersion for Detecting Exosomes" in proc. 2019 Taiwan and Japan Conference on Circuits and Systems (TJCAS 2019 at Nikko), Aug.2019.
  56. Taiki Nakanishi, Syunya Murakami, Atsuki Kobayashi, Md. Zahidul Islam, Kiichi Niitsu, "A 40-GHz Fully Integrated On-Chip-VNA-based Circulating Tumor Cells Analyzer in 65-nm CMOS Technology" in proc. 2019 Taiwan and Japan Conference on Circuits and Systems (TJCAS 2019 at Nikko), Aug.2019.
  57. Kosuke Uchiyama, Shota Jodo, Shunya Murakami, Md Zahidul Islam, Atsuki Kobayashi, Kiichi Niitsu,"Design of On-Chip Integrated Solar Cells in 65nm CMOS Technology for Solar-Cell-Powered Continuous Glucose Monitoring Systems" in proc. 2019 Taiwan and Japan Conference on Circuits and Systems (TJCAS 2019 at Nikko), Aug.2019.
  58. Shota Jodo, Cong Dang Bui, Kosuke Uchiyama, Md Zahidul Islam, Atsuki Kobayashi, Kiichi Niitsu,"Design of CMOS GaN Gate Driver for 13.56MHz GaN-Based Power Electronics Application in 180nm High-Voltage CMOS Technology" in proc. 2019 Taiwan and Japan Conference on Circuits and Systems (TJCAS 2019 at Nikko), Aug.2019.
  59. Ryusei Sakai, Shunya Murakami, Taiki Nakanishi, Md Zahidul Islam, Atsuki Kobayashi, Kiichi Niitsu,"Desing of A CML-Based NMOS-Only SelfOscillating Voltage Doubler for Enabling UltraLow Start-Up Voltage in 65-nm CMOS Technology" in proc. 2019 Taiwan and Japan Conference on Circuits and Systems (TJCAS 2019 at Nikko), Aug.2019.
  60. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi, Yuichi Momoi and Kiichi Niitsu, ”Enhance OCV of CNH dependency in Solid-state CMOS compatible glucose Fuel Cell for next-generation internet of things (IoT)", in Proc. Molecular Electronics and Bioelectronics (M&BE), Jun.2019.
  61. Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Cong Dang Bui, Atsuki Kobayashi, and Kiichi Niitsu, "0.27nW Fully-Integrated Supply-Modulated OOK Transmitter in 65nm CMOS for Self-Powered and Low-Cost Continuous Glucose Monitoring Contact Lens", in Proc. 11th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 12th International Conference on Plasma-Nano Technology & Science (ISPlasma2019 / IC-PLANTS2019), p.8323, Mar.2019, 
  62. Md. Zahidul Islam, Shigeki Arata, Kenya Hayashi, Atsuki Kobayashi and Kiichi Niitsu,"Various Type of CNT Dispersion Applied to Bio-Fuel Cell for High Yield of Production", in Proc. 11th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 12th International Conference on Plasma-Nano Technology & Science (ISPlasma2019 / IC-PLANTS2019), p.8323, Mar.2019, 
  63. Atsuki Kobayashi, Kenya Hayashi, Shigeki Arata, Shunya Murakami, Ge Xu, and Kiichi Niitsu, "A 65-nm CMOS 1.4-nW Self-Controlled Dual-Oscillator-Based Supply Voltage Monitor for Biofuel-Cell-Combined Biosensing Systems," 2019 IEEE International Symposium on Circuits and Systems (ISCAS 2019), pp.1-5, May.2019. (Sapporo Japan)
    DOI:10.1109/ISCAS.2019.8702693
  64. Tran Minh Quan, Takuyoshi Doike, Dang Cong Bui, Kenya hayashi, Shigeki Arata, Atsuki Kobayashi, Md. Zahidul Islam, Kiichi Niitsu, "AI-Based Edge-Intelligent Hypoglycemia Prediction System Using Alternate Learning and Inference Method for Blood Glucose Level Data with Low-periodicity," 2019 IEEE International Conference on Artificial Intelligence Circuits and Systems (AICAS 2019), pp.201-206, Mar.2019. (Taiwan)   
    DOI: 10.1109/AICAS.2019.8771604.
  65. Taiki Nakanishi, Maya mmMatsunaga, Shunya Murakami, Atsuki Kobayashi, Kiichi Niitsu, "A 65-nm CMOS Fully-Integrated Circulating Tumor Cell and Exosome Analyzer Using an On-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window," Proceedings of the 24th Asia and South Pacific Design Automation Conference (ASP-DAC 2019), pp.19-20, Jan.2019.
    DOI: https://doi.org/10.1145/3287624.3287750
  66. Kiichi Niitsu, Yuuki Yamaji, Atsuki Kobayashi, Kazuo Nakazato, "A Low-Voltage CMOS Electrophoresis IC Using Electroless Gold Plating for Small-Form-Factor Biomolecule Manipulation," Proceedings of the 24th Asia and South Pacific Design Automation Conference (ASP-DAC 2019), pp.11-12, Jan.2019.
    DOI: https://doi.org/10.1145/3287624.3287755
  67. Atsuki Kobayashi, Yuya Nishio, Kenya Hayashi, Shigeki Arata, Kiichi Niitsu, "Design of Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS," Proceedings of the 24th Asia and South Pacific Design Automation Conference (ASP-DAC 2019), pp.9-10, Jan.2019.
    DOI: https://doi.org/10.1145/3287624.3287756
  68. Kiichi Niitsu, Taichi Sakabe, Mariko Miyachi, Yoshinori Yamanoi, Hiroshi Nishihara, Tatsuya Tomo, Kazuo Nakazato, "2D Optical Imaging Using Photosystem I Photosensor Platform with 32×32 CMOS Biosensor Array," Proceedings of the 24th Asia and South Pacific Design Automation Conference (ASP-DAC 2019), pp.7-8, Jan.2019.
    DOI: https://doi.org/10.1145/3287624.3287751
  69. Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Cong Dang Bui, Takuyoshi Doike, Maya Matsunaga, Atsuki Kobayashi, Kiichi Niitsu, "Design of 385 x 385 µm2 0.165V 270pW Fully-Integrated Supply-Modulated OOK Transmitter in 65nm CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens," Proceedings of the 24th Asia and South Pacific Design Automation Conference (ASP-DAC 2019), pp.5-6, Jan.2019.
    DOI: https://doi.org/10.1145/3287624.3287753
  70. Maya Matsunaga, Taiki Nakanishi, Atsuki Kobayashi, Kiichi Niitsu, "A Three-Dimensional Millimeter-Wave Frequency-Shift Based CMOS Biosensor using Vertically Stacked Spiral Inductors in LC Oscillators," Proceedings of the 24th Asia and South Pacific Design Automation Conference (ASP-DAC 2019), pp.3-4, Jan.2019.　
    DOI: https://doi.org/10.1145/3287624.3287749
  71. Shigeki Arata, Kenya Hayashi, Xu Ge, Shunya Murakami, Cong Dang Bui, Atsuki Kobayashi, and Kiichi Niitsu, "Reactive Ion Etching in Development of 0.6mm by 0.6mm CMOS-Compatible Solid-State Glucose Fuel Cell for Small-Form-Factor Biomedical IoT Applications", in Proc. International Symposium on Dry Process (DPS 2018), p.1, Nov.2018.               
  72. Shunya Murakami, Kenya Hayashi, Shigeki Arata, Ge Xu, Cong Dang Bui, Atsuki Kobayashi and Kiichi Niitsu, "A Stochastic Oscillator Using Multiple Ring Oscillators and OR-Gate for Low Voltage Operation in 65 nm CMOS," 2018 IEEE Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics（PrimeAsia 2018), pp.23-26, Oct.2018. (China)
    DOI: 10.1109/PRIMEASIA.2018.8597600
  73. Keisuke Kayano, Shunya Murakami, Maya Matsunaga, Keisuke Itakura, Atsuki Kobayashi and Kiichi Niitsu, "Design of an Energy-Autonomous Supply-Sensing Biosensor Platform Using Biofuel Cells and Human-Body-Communication Transmitter," 2018 IEEE Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics（PrimeAsia 2018), pp.19-22, Oct.2018.
    DOI: 10.1109/PRIMEASIA.2018.8597942
  74. Yuya Nishio, Atsuki Kobayashi and Kiichi Niitsu, "A Constant-Power Inductive-Coupling Transmitter Using Auxiliary Driving Technique in 65nm SOTB CMOS for Low-Power Supply-Sensing Biosensing Platform toward Healthcare IoTs," 2018 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2018), pp.65-68, Oct.2018.
    DOI:10.1109/APCCAS.2018.8605645
  75. Ge Xu, Kenya Hayashi, Shigeki Arata, Shunya Murakami, Cong Dang Bui, Atsuki Kobayashi and Kiichi Niitsu, "A BER-Modulated Inductive-Coupling Transceiver Using Dynamic Intermediate Interference Control Technique for Low-Power Communication," 2018 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2018), pp.69-73, Oct.2018.
    DOI: 10.1109/APCCAS.2018.8605709
  76. Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Cong Dang Bui, Atsuki Kobayashi, and Kiichi Niitsu, "Live Demonstration: 385 X 385 µm2 0.165V 270pW Fully-Integrated Supply-Modulated OOK TX in 65nm CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens," 2018 IEEE Biomedical Circuits and Systems Conference (BioCAS 2018), pp.1-1, Oct.2018.
    DOI: 10.1109/BIOCAS.2018.8584841
  77. Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Cong Dang Bui, Takuyoshi Doike, Maya Matsunaga, Atsuki Kobayashi, and Kiichi Niitsu, "A 385um × 385um 0.165 V 0.27 nW Fully-Integrated Supply-Modulated OOK CMOS TX in 65nm CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens," 2018 IEEE Biomedical Circuits and Systems Conference (BioCAS 2018), pp.1-4, Oct.2018.
    DOI: 10.1109/BIOCAS.2018.8584660
  78. Shigeki Arata, Kenya Hayashi, Xu Ge, Shunya Murakami, Dang Cong Bui, Atsuki Kobayashi, and Kiichi Niitsu, "10% Yield and 370-mV OCV of 0.36 mm2 Solid-State CMOS-Compatible Glucose Fuel Cell by Using Repeated Separator Coating", in Proc. International Conference on Solid State Devices and Materials (SSDM 2018), Sep. 2018. 
  79. Kenya Hayashi, Shigeki Arata, Shunya Murakami, Yuya Nishio, Atsuki Kobayashi, and Kiichi Niitsu, "A 6.1nA Fully-Integrated CMOS Supply-Modulated OOK Transmitter in 55nm DDC CMOS for Glass-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens", IEEE International Symposium on Integrated Circuits and Systems (ISICAS 2018), Sep. 2018. (Taormina, Italy)
    DOI: 10.1109/TCSII.2018.2860636
  80. Takuyoshi Doike, Kenya Hayashi, Shigeki Arata, Karim Nissar Mohammad, Atsuki Kobayashi, and Kiichi Niitsu, "A Blood Glucose Level Prediction System Using Machine Learning Based on Recurrent Neural Network for Hypoglycemia Prevention," 2018 16th IEEE International New Circuits and Systems Conference (NEWCAS 2018), pp.291-295, Jun.2018.
    DOI: 10.1109/NEWCAS.2018.8585468
  81. Kiichi Niitsu, Taichi Sakabe, Mariko Miyachi, Yoshinori Yamanoi, Hiroshi Nishihara, Tatsuya Tomo, Kazuo Nakazato, "Demonstration of 2D Optical Imaging Using Photosystem I Photosensor Platform with 32×32 CMOS Biosensor Array," 2018 16th IEEE International New Circuits and Systems Conference (NEWCAS 2018), pp.104-108, Jun.2018.
    DOI: 10.1109/NEWCAS.2018.8585603
  82. Atsuki Kobayashi, Yuya Nishio, Kenya Hayashi, Kazuo Nakazato, and Kiichi Niitsu, "A 350-mV, Under-200-ppm Allan Deviation Floor Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS," 2018 IEEE Custom Integrated Circuit Conference (CICC 2018), pp.1-4, Apr.2018.
    DOI: 10.1109/CICC.2018.8357093
  83. Kiichi Niitsu, "Energy-autonomous Biomedical IoTs using Plasma-enhanced Bio-fuel Cell and Low-energy CMOS Biosensor", in Proc. 10th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 11th International Conference on Plasma-Nano Technology & Science (ISPlasma2018 / IC-PLANTS2018), p.06pA14I, Mar.2018.
  84. Takuyoshi Doike and Kiichi Niitsu, "An AI-Enhanced Blood Glucose Sensing System Using Machine Learning Based on Recurrent Neural Network for Hypoglycemia Prevention", in Proc. 10th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 11th International Conference on Plasma-Nano Technology & Science (ISPlasma2018 / ICPLANTS2018), p.07P65, Mar.2018.　　　　　
  85. Sanato Nagata, Norifumi Kameshiro, Daigo Terutsuki, Hidefumi Mitsuno, Takeshi Sakurai, Kiichi Niitsu, Kazuo Nakazato, Ryohei Kanzaki, and Masahiko Ando, "A HIGH-DENSITY INTEGRATED ODORANT SENSOR ARRAY SYSTEM BASED ON INSECT CELLS EXPRESSING INSECT ODORANT RECEPTORS," 2018 IEEE Micro Electro Mechanical Systems (MEMS 2018), pp.282-285, Jan.2018.
    DOI: 10.1109/MEMSYS.2018.8346540　　　　　　　　　　　　
  86. Yuya Nishio, Atsuki Kobayashi, and Kiichi Niitsu, "A 28μm2, 0.11Hz, 4.5pW gate leakage timer using differential leakage technique in 55nm DDC CMOS for small-footprint, low-frequency and low-power timing generation," 2017 24th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2017), pp.368-371, Dec.2017.
    DOI: 10.1109/ICECS.2017.8292063
  87. Kei Ikeda, Atsuki Kobayashi, and Kiichi Niitsu, "A Scalable Time-Domain Biosensor Array Using a Capacitor-Less CMATC and Logarithmic Cyclic Time-Attenuation-Based TDC with Discharge Acceleration for High-Spatial-Resolution Bio-Imaging," 2017 24th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2017), pp.406-409, Dec.2017.
    DOI: 10.1109/ICECS.2017.8292072
  88. Maya Matsunaga, Taiki Nakanishi, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Three-Dimensional Millimeter-wave Frequency-shift-based CMOS Biosensor Using Vertically Stacked LC Oscillators," 2017 IEEE Nordic Circuits and Systems Conference (NORCAS 2017): NORCHIP and International Symposium of System-on-Chip (SoC), pp.1-6, Oct.2017.
    DOI: 10.1109/NORCHIP.2017.8124974         
  89. Taiki Nakanishi, Maya Matsunaga, Atsuki Kobayashi, Kazuo Nakazato and Kiichi Niitsu, "A Fully-Integrated Circulating Tumor Cell Analyzer Using an on-Chip Vector Network Analyzer and a Transmission-Line-Based Detection Window in 65-nm CMOS," 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS 2017), pp.1-4, Oct.2017.
    DOI: 10.1109/BIOCAS.2017.8325554
  90. Eizo Ushijima, Satoshi Fujimoto, Kiichi Niitsu, and Kazuo Nakazato, "Application of Magnetic Arrangement of Microbeads for CMOS Biosensor Array Sensitivity," 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS 2017), pp.1-4, Oct.2017.
    DOI:     10.1109/BIOCAS.2017.8325048
  91. Shigeki Arata, Kenya Hayashi, Yuya Nishio, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Wafer-Scale Development of 0.36 mm^2 228mV Open-Circuit-Voltage Solid-State CMOS-Compatible Glucose Fuel Cell for Healthcare IoT Application," in Proc. International Conference on Solid State Devices and Materials (SSDM 2017), Sep.2017.
  92. Kiichi Niitsu, Takashi Ando, Tomoki Amano, Atsuki Kobayashi, Keigo Takeda, Hiroki Kondo, Masaru Hori, and Kazuo Nakazato, "Enhancement of Open Circuit Voltage and Power of Implantable CMOS-Compatible Glucose Fuel Cell by Employing Pt-Supported on Nanographene in Anodic Catalyst," in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE9), Jun.2017.
  93. Taiki Nakanishi, Atsuki Kobayashi, Kazuo Nakazato and Kiichi Niitsu, "A Fully Integrated CMOS Millimeter Wave Biosensor Circuit with An On-Chip Vector Network Analyzer for Circulating Tumor Cell (CTC) Analysis," in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE9), Jun.2017.
  94. Maya Matsunaga, Atsuki Kobayashi, Kazuo Nakazato and Kiichi Niitsu, "Study on relationship between inductance and power consumption in bio integrated sensor circuit based on LC-oscillator using millimeter wave," in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE9), Jun.2017.
  95. Yuuya Hayashi, Kazuo Nakazato and Kiichi Niitsu, "Design and Physical Implementation of Pad-Less CMOS Biosensor Array Chip for Low-Cost Packaging-Less Bio-Imaging Platform," in Proc. 9th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 9th International Conference on Plasmas-Nano Technology & Science (ISPlasma2017 / IC-PLANTS2017), p.02P29, Mar.2017.
  96. Masaki Kawase, Kazuo Nakazato and Kiichi Niitsu, "NASBA Amplification and Detection of Micro-RNA Using Plasma-Treated CMOS FET-Based Redox Potential Sensor Array," in Proc. 9th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 9th International Conference on Plasmas-Nano Technology & Science (ISPlasma2017 / IC-PLANTS2017), p.02P28, Mar.2017. 
  97. Kohei Gamo, Kazuo Nakazato and Kiichi Niitsu, "A CMOS-based bacteria-counting sensor with 1024 × 1024 baceteria-sized microelectrode array and current integration circuit," in Proc. 9th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 9th International Conference on Plasmas-Nano Technology & Science (ISPlasma2017 / IC-PLANTS2017), p.02P27, Mar.2017.
  98. Keisuke Itakura, Keisuke Kayano, Kazuo Nakazato and Kiichi Niitsu, "A CMOS Electrochemical Impedance Spectroscopy Biosensor in 55nm DDC Technology for High-Sensitivity Cell-State Monitoring," in Proc. 9th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 9th International Conference on Plasmas-Nano Technology & Science (ISPlasma2017 / IC-PLANTS2017), p.02E11O, Mar.2017.
  99. Keisuke Kayano, Keisuke Itakura, Atsuki Kobayashi, Yuya Nishio, Kazuo Nakazato and Kiichi Niitsu, "Design of an energy-autonomous supply-sensing biosensor platform using biofuel cells and human-body-communication transmitter," in Proc. 9th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 9th International Conference on Plasmas-Nano Technology & Science (ISPlasma2017 / IC-PLANTS2017), p.02E09O, Mar.2017.
  100. Atsuki Kobayashi, Kei Ikeda, Yudai Ogawa, Matsuhiko Nishizawa, Kazuo Nakazato, and Kiichi Niitsu、”Design of an Energy-Autonomous Bio-Sensing System Using a Biofuel Cell and 0.19V 53µW Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter,” 2017 22nd ACM/IEEE Asia and South Pacific Design Automation Conference (ASP-DAC 2017), pp.25-26, Jan.2017. 
    DOI:     10.1109/ASPDAC.2017.7858284
  101. Kei Ikeda, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "A Scalable Time-Domain Biosensor Array Using Logarithmic Cyclic Time-Attenuation-Based TDC for High-Resolution and Large-Scale Bio-Imaging," 2017 22nd Asia and South Pacific Design Automation Conference (ASP-DAC 2017), pp.11-12, Jan.2017.
    DOI:     10.1109/ASPDAC.2017.7858277
  102. Kohei Gamo, Kazuo Nakazato, and Kiichi Niitsu, "A Current-Integration-Based CMOS Amperometric Sensor with 1.2 μm × 2.05 μm Electroless-Plated Microelectrode Array for High-Sensitivity Bacteria Counting," 2017 22nd Asia and South Pacific Design Automation Conference (ASP-DAC 2017), pp.19-20, Jan.2017.　
    DOI:     10.1109/ASPDAC.2017.7858281
  103. Kei Ikeda, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "A Current-Mode Analog-to-Time Converter with Short-Pulse Output Capability Using Local Intra-Cell Activation for High-Speed Time Domain Biosensor Array," 2016 IEEE Nordic Circuits and Systems Conference (NORCAS 2016), pp.1-6, Nov.2016.
    DOI:     10.1109/NORCHIP.2016.7792901
  104. Atsuki Kobayashi, Kei Ikeda, Yudai Ogawa, Matsuhiko Nishizawa, Kazuo Nakazato, and Kiichi Niitsu, "An Energy-Autonomous Bio-Sensing System Using a Biofuel Cell and 0.19V 53μW 65nm-CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter," 2016 IEEE Biomedical Circuits and Systems Conference (BioCAS 2016), pp.148-151, Oct.2016. 
    DOI: 10.1109/BioCAS.2016.7833753
  105. Kohei Gamo, Kazuo Nakazato, and Kiichi Niitsu, "Live Demonstration: Noise-Immune Current-Integration-Based CMOS Amperometric Sensor Platform with 1.2 µm × 2.05µm Electroless-Plated Microelectrode Array for Robust Bacteria Counting," 2016 IEEE Biomedical Circuits and Systems Conference (BioCAS 2016), pp.132-132, Oct.2016.       
    DOI:     10.1109/BioCAS.2016.7833746
  106. Kei Ikeda, Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Live Demonstration: Current-Mode Analog-to-Time Converter for a Large Scale CMOS Biosensor Array," 2016 IEEE Biomedical Circuits and Systems Conference (BioCAS 2016), pp.131-131, Oct.2016.
    DOI:     10.1109/BioCAS.2016.7833745
  107. Kiichi Niitsu, Kei Ikeda, Keita Muto, and Kazuo Nakazato, "Design of a CMOS Voltage-to-Current Converter with Dynamic Range Enhancement Using Source Degeneration", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 09P87.
  108. Kiichi Niitsu, Kohei Yoshida, Atsuki Kobayashi, and Kazuo Nakazato, "Design of CMOS Magnetic-Based Microbeads Detection Using an Asynchronous Intra-Chip Inductive-Coupling Transceiver", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 09P86.
  109. Kei Ikeda, Kazuo Nakazato, and Kiichi Niitsu, "Analysis on Scalability of Current-Mode Analog-to-Time Converter for a High-Resolution CMOS Biosensor Array", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 09P85.
  110. Atsuki Kobayashi, Kazuo Nakazato, and Kiichi Niitsu, "Design Methodology of Supply-Sensing CMOS Biosensor Using Bio-Fuel Cell for Energy-Autonomous Healthcare Application", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 09P84.
  111. Masaki Kawase, Kiichi Niitsu, and Kazuo Nakazato, "Temparature-Regulated CMOS Biosensor Platform for Portable MicroRNA Amplification and Detection", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 09P83.
  112. Yuya Hayashi, Kiichi Niitsu, and Kazuo Nakazato, "Pad-Less CMOS Biosensor Array Chip for Low-Cost Packaging-Less Bio-Imaging Platform", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 09P82.
  113. Kiichi Niitsu, Atsuki Kobayashi, and Kazuo Nakazato, "Energy-Autonomous, Disposable, Supply-Sensing Biosensor using Bio-Fuel Cell and Low-Voltage All-Digital CMOS Supply-controlled Ring Oscillator with Inductive-Coupling Transmitter", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 09aE07O.
  114. Takashi Ando, Kazuo Nakazato, and Kiichi Niitsu, "Enhancement of Open Circuit Voltage of Implantable CMOS-Compatible Glucose Fuel Cell by Improving the Anodic Catalyst", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 08aE07O.
  115. Taichi Sakabe, Kiichi Niitsu, Mariko Miyachi, Yoshinori Yamanoi, Hiroshi Nishihara, Tatsuya Tomo, and Kazuo Nakazato, "Bioluminescence Detection using Photosystem I Bio-photosensor", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 07pE10O.
  116. Yuuki Yamaji, Kiichi Niitsu, and Kazuo Nakazato, "Low-voltage Electrophoresis on a CMOS Platform with 32x32 Sample/Hold Cell Array", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 07pE09O.
  117. Hisashi Yokoi, Kiichi Niitsu, and Kazuo Nakazato, "A CMOS Magnetic-Based Beads Recognition Circuit for Multi-Object Biosensing", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 07pE07O.
  118. Kohei Gamo, Kiichi Niitsu, and Kazuo Nakazato, "Bacteria counting using electoless-plated 1024 × 1024 microelectrode array and CMOS-based current integration circuit", in Proc. 8th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nano materials / 8th International Conference on Plasmas-Nano Technology & Science (ISPlasma2016 / IC-PLANTS2016), Mar. 2016, 07pE06O.
  119. Kiichi Niitsu, Atsuki Kobayashi, Yudai Ogawa, Matsuhiko Nishizawa, and Kazuo Nakazato, "Design of an Energy-Autonomous, Disposable, Supply-Sensing Biosensor Using Bio Fuel Cell and 0.23-V 0.25-µm Zero-Vth All-Digital CMOS Supply-Controlled Ring Oscillator with Inductive Transmitter,” 2016 21st Asia and South Pacific Design Automation Conference (ASP-DAC 2016), pp.23-24, Jan.2016.
    DOI: 10.1109/ASPDAC.2016.7427983
  120. Kohei Gamo, Kiichi Niitsu, and Kazuo Nakazato, "Low-noise CMOS amperometric sensor for high-sensitivity bacteria counting", in Proc. IEEE Transdisciplinary-Oriented Workshop for Emerging Researchers (TOWERS 2015), Nov. 2015, p.50.
  121. Yuuji Yamaji, Kiichi Niitsu, and Kazuo Nakazato, "A Low-Voltage CMOS Electrophoresis Chip with 32 × 32 Sample/Hold Cell Array," in Proc. IEEE Transdisciplinary-Oriented Workshop for Emerging Researchers (TOWERS 2015), Nov. 2015, p.47.
  122. Miho Arai, Isao Shimizu, Haruo Kobayashi, Keita Kurihara, Shu Sasaki, Shohei Shibuya, Kiichi Niitsu, and Kazuyoshi Kubo, "Finite aperture time effects in sampling circuit," 2015 IEEE 11th International Conference on ASIC (ASICON 2015), pp.1-4, Nov.2015.   
    DOI: 10.1109/ASICON.2015.7516913
  123. Kiichi Niitsu, Atsuki Kobayashi, Yudai Ogawa, Matsuhiko Nishizawa, and Kazuo Nakazato, "An Energy-Autonomous, Disposable, Big-Data-Based Supply-Sensing Biosensor Using Bio Fuel Cell and 0.23-V 0.25-μm Zero-Vth All-Digital CMOS Supply-Controlled Ring Oscillator with Inductive Transmitter,” 2015 IEEE Biomedical Circuits and Systems Conference (BioCAS 2015), pp.1-4, Oct.2015.  
    DOI: 10.1109/BioCAS.2015.7348434
  124. Kohei Gamo, Kiichi Niitsu, and Kazuo Nakazato, "Noise-Immune Current-Integration-Based CMOS Amperometric Sensor Platform with 1.2 μm × 2.05 μm Electroless-Plated Microelectrode Array for Robust Bacteria Counting,” 2015 IEEE Biomedical Circuits and Systems Conference (BioCAS 2015), pp.1-4, Oct.2015.  
    DOI: 10.1109/BioCAS.2015.7348420
  125. Kohei Gamo, Kiichi Niitsu, and Kazuo Nakazato, "A CMOS Current Integrator with 1.2um × 2.05um Electroless-Plated 1024 × 1024 Microelectrode Array for High-Sensitivity Bacteria Detection", in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE8), Jun. 2015.
  126. Suiki Tanaka, Kiichi Niitsu, and Kazuo Nakazato, "An Inverter-Based CMOS Level-Crossing ADC for Low-Power Biosensing", in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE8), Jun. 2015.
  127. Kiichi Niitsu, Kohei Yoshida, and Kazuo Nakazato, "A Low-Power CMOS Magnetic Cell Manipulation Platform Using Charge Recycling Technique", in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE8), Jun. 2015.
  128. Keita Muto, Kiichi Niitsu, and Kazuo Nakazato, "A 1.8V-Input-Range Voltage-to-Current Converter Using Source Degeneration for Low-Noise Multimodal CMOS Biosensor Array", in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE8), Jun. 2015.
  129. Yuuki Yamaji, Kiichi Niitsu, and Kazuo Nakazato, "A Low-Voltage High-Resolution CMOS Electrophoresis Platform with 32×32 Sample/Hold Cell Array", in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE8), Jun. 2015.
  130. Kiichi Niitsu and Kazuo Nakazato, "Non-optical Frequency-Shift Based Testing of Electrode Formation Using LC-VCO for High-Reliability CMOS Biosensor Array", in Proc. International Conf. on Molecular Electronics and Bioelectronics (M&BE8), Jun. 2015.
  131. Yusuke Osawa, Daiki Hirabayashi, Naohiro Harigai, Haruo Kobayashi, Osamu Kobayashi, and Kiichi Niitsu, "Phase Noise Measurement Technique Using Delta-Sigma TDC Without Reference Clock", in Proc. 1st International Symposium of Gunma University Medical Innovation and 6th International Conference on Advanced Micro-Device Engineering, Dec. 2014, p.P093. 
  132. Hayato Komori, Kiichi Niitsu, Junko Tanaka, Yu Ishige, Masao Kamahori, and Kazuo Nakazato, " An Extended-Gate CMOS Sensor Array with Enzyme-Immobilized Microbeads for Redox-Potential Glucose Detection," 2014 IEEE Biomedical Circuits and Systems Conference (BioCAS 2014),pp.464-467, Oct.2014.  
    DOI:10.1109/BioCAS.2014.6981763                                                                 
  133. Shoko Ota, Kiichi Niitsu, Hiroki Kondo, Masaru Hori, and Kazuo Nakazato, "A CMOS Sensor Platform with 1.2 µm × 2.05 µm Electroless-Plated 1024 × 1024 Microelectrode Array for High-Sensitivity Rapid Direct Bacteria Counting," 2014 IEEE Biomedical Circuits and Systems Conference (BioCAS 2014), pp.460-463, Oct.2014. 
    DOI:10.1109/BioCAS.2014.6981762
  134. Hayato Komori, Kiichi Niitsu, Junko Tanaka, Yu Ishige, Masao Kamahori, and Kazuo Nakazato, "Live Demonstration: An Extended-Gate CMOS Sensor Array with Enzyme-Immobilized Microbeads for Redox-Potential Glucose Detection," 2014 IEEE Biomedical Circuits and Systems Conference (BioCAS 2014), pp.191-191, Oct.2014.                                         
    DOI:    10.1109/BioCAS.2014.6981694
  135. Shoko Ota, Kiichi Niitsu, Hiroki Kondo, Masaru Hori, and Kazuo Nakazato, "Live Demonstration: A CMOS Sensor Platform with 1.2 µm × 2.05 µm Electroless-Plated 1024 × 1024 Microelectrode Array for High-Sensitivity Rapid Direct Bacteria Counting," 2014 IEEE Biomedical Circuits and Systems Conference (BioCAS 2014), pp.185-185, Oct.2014.               
    DOI:    10.1109/BioCAS.2014.6981688
  136. Hiroki Ishihara, Kiichi Niitsu, and Kazuo Nakazato, "DNA Single Base Polymerization Detection Using CMOS FET-Based Redox Potential Sensor Array," in Proc. International Conference on Solid State Devices and Materials (SSDM 2014), pp.596-597, Sep.2014.
  137. Yusuke Osawa, Daiki Hirabayashi, Naohiro Harigai, Haruo Kobayashi, Kiichi Niitsu, and Osamu Kobayashi, "Phase Noise Measurement Techniques Using Delta-Sigma TDC," IEEE 19th Annual  International Mixed-Signals, Sensors, and Systems Test Workshop (IMS3TW 2014), pp.1-6, Sep.2014.   
    DOI:10.1109/BioCAS.2014.6981763
  138. Masayuki Takihi, Kiichi Niitsu, and Kazuo Nakazato, "Charge-Conserved Analog-to-Time Converter for a Large-Scale CMOS Bionsensor Array," 2014 IEEE International Symposium on Circuits and Systems (ISCAS 2014), pp.33-36, Jun.2014.
    DOI:    10.1109/ISCAS.2014.6865058
  139. Yukiko Arai, Yu Liu, Haruo Kobayashi, Tatsuji Matsuura, Osamu Kobayashi, Masanobu Tsuji, Masafumi Watanabe, Ryoji Shiota, Noriaki Dobashi, Sadayoshi Umeda, Isao Shimizu, Kiichi Niitsu, Nobukazu Takai, and Takahiro J. Yamaguchi, "Noise-Shaping Cyclic ADC Architecture", in Proc. International Conference on Advanced Micro-Device Engineering, p.76, Dec.2013. 
  140. Masahiro Murakami, Shaiful Nizam Mohyar, Haruo Kobayashi, Tatsuji Matsuura, Osamu Kobayashi, Masanobu Tsuji, Sadayoshi Umeda, Ryoji Shiota, Noriaki Dobashi, Masafumi Watanabe, Isao Shimizu, Kiichi Niitsu, Nobukazu Takai, and Takahiro J. Yamaguchi, "Study of Complex Multi-Bandpass DWA algorithm for I-Q Signal Generation", in Proc. International Conference on Advanced Micro-Device Engineering, p.75, Dec.2013.
  141. Yusuke Osawa, Daiki Hirabayashi, Naohiro Harigai, Haruo Kobayashi, Osamu Kobayashi, Kiichi Niitsu, Takahiro J. Yamaguchi, and Nobukazu Takai, "Phase Noise Measurement with Delta-Sigma TDC", in Proc. International Conference on Advanced Micro-Device Engineering, p.74, Dec.2013.
  142. Yusuke Osawa, Daiki Hirabayashi, Naohiro Harigai, Haruo Kobayashi, Osamu Kobayashi, Masanobu Tsuji, Sadayoshi Umeda, Ryoji Shiota, Noriaki Dobashi, Masafumi Watanabe, Tatsuji Matsuura, Kiichi Niitsu, Takahiro J. Yamaguchi, Nobukazu Takai, and Isao Shimizu, "Phase Noise Measurement and Testing with Delta-Sigma TDC", in Proc. International Conference on Integrated Circuits, Design, and Verification (ICDV 2013), pp.105-109, Nov.2013.
  143. Yukiko Arai, Yu Liu, Haruo Kobayashi, Tatsuji Matsuura, Osamu Kobayashi, Masanobu Tsuji,  Masafumi Watanabe, Ryoji Shiota, Noriaki Dobashi, Sadayoshi Umeda, Isao Shimizu, Kiichi Niitsu, Nobukazu Takai, and Takahiro J. Yamaguchi, "Noise-Shaping Cyclic ADC Architecture", in Proc. International Conference on Integrated Circuits, Design, and Verification (ICDV 2013), pp.272-277, Nov.2013.
  144. Shaiful Nizam Mohyar, Harnani Hassan, Masahiro Murakami, Atsushi Motozawa, Haruo Kobayashi, Osamu Kobayashi, Tatsuji Matsuura, Nobukazu Takai, Isao Shimizu, Kiichi Niitsu, Masanobu Tsuji, Masafumi Watanabe, Ryoji Shiota, Noriaki Dobashi, Sadayoshi Umeda, and Takahiro J. Yamaguchi, "SFDR Improvement Algorithms for Current-Steering DACs", in Proc. International Conference on Integrated Circuits, Design, and Verification (ICDV 2013), pp.93-98, Nov.2013.
  145. Zachary Nosker, Yasunori Kobori, Haruo Kobayashi, Kiichi Niitsu, Tetsuji Yamaguchi, Eiji Shikata, Tsuyoshi Kaneko, Nobukazu Takai, and Kimio Ueda, "A Single Supply Bootsrapped Boost Regulator for Energy Harvesting Applications", in Proc. International Conference on Integrated Circuits, Design, and Verification (ICDV 2013), pp.231-236, Nov.2013.
  146. Masahiro Murakami, Shaiful Nizam Mohyar, Haruo Kobayashi, Tatsuji Matsuura, Osamu Kobayashi, Masanobu Tsuji, Sadayoshi Umeda, Ryoji Shiota, Noriaki Dobashi, Masafumi Watanabe, Isao Shimizu, Kiichi Niitsu, Nobukazu Takai, and Takahiro J. Yamaguchi, "Study of Complex Multi-Bandpass ΔΣ Modulator for I-Q Signal Generation", in Proc. International Conference on Integrated Circuits, Design, and Verification (ICDV 2013), pp.99-104, Nov.2013.
  147. Tsuyoshi Kuno, Kiichi Niitsu, and Kazuo Nakazato, "Amperometric Electrochemical Sensor Array for On-Chip Simultaneous Imaging", in Proc. International Conference on Solid State Devices and Materials (SSDM 2013), pp.846-847, Sep.2013.
  148. Daiki Hirabayashi, Yusuke Osawa, Naohiro Harigai, Osamu Kobayashi, Kiichi Niitsu, Takahiro J. Yamaguchi, and Nobukazu Takai, "Phase Noise Measurement with Sigma-Delta TDC", in Proc. IEEE International Test Conference (ITC 2013) (Poster Session), Sep. 2013.
  149. Kiichi Niitsu, Naohiro Harigai, Daiki Hirabayashi, Daiki Oki, Masato Sakurai,Osamu Kobayashi, Takahiro J. Yamaguchi, and Haruo Kobayashi, "Design of a Clock Jitter Reduction Circuit Using Gated Phase Blending Between Self-Delayed Clock Edges," IEEE/ACM 2013 18th Asia and South Pacific Design Automation Conference (ASP-DAC 2013), pp.103-104, Jan.2013.
    DOI:    10.1109/ASPDAC.2013.6509577
  150. Satoshi Uemori, Masamichi Ishii, Haruo Kobayashi, Yuta Doi, Osamu Kobayashi, Tatsuji Matsuura, Kiichi Niitsu, Yuta Arakawa, Daiki Hirabayashi, Yuji Yano, Tatsuhiro Gake, Nobukazu Takai, and Takahiro J. Yamaguchi, "Multi-bit Sigma-Delta TDC Architecture with Self-Calibration," 2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2012), pp.671-674, Dec.2012.
    DOI:10.1109/APCCAS.2012.6419124
  151. Guanglei Jin, Hao Chen, Chuan Gao, Yunpeng Zhang, Haruo Kobayashi, Nobukazu Takai, Kiichi Niitsu, and Khayrollah Hadidi, "Digitally-Controlled Gm-C Bandpass Filter", in Proc. IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2012), Dec. 2012, C2L-B-7036.
    DOI:10.1109/APCCAS.2012.6419065                                                                                
  152. Yasunori Kobori, Qiulin Zhu, Murong Li, Feng Zhao, Zachary Nosker, Shu Wu, Shaiful N. Mohyar, Masanori Onozawa, Haruo Kobayashi, Nobukazu Takai, Kiichi Niitsu, Takahiro Odaguchi, Isao Nakanishi, Kenji Nemoto, and Jun-ichi Matsuda, "Single Inductor Dual Output DC-DC Converter Design with Exclusive Control," 2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2012), pp.436-439, Dec.2012.  
    DOI:10.1109/APCCAS.2012.6419065
  153. Hong Gao,Lin Xing, YasunoriKobori, Feng Zhao, Haruo Kobayashi, Shyunsuke Miwa, Atsushi Motozawa,Zachary Nosker, Kiichi Niitsu, Nobukazu Takai, Takahiro Odaguchi, Isao Nakanishi, Kenji Nemoto, and Jun-ichi Matsuda, "DC-DC Converter with Continuous-Time Feed-Forward Sigma-Delta Modulator Control," 2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2012), pp.65-68, Dec.2012. 
    DOI:10.1109/APCCAS.2012.6418972
  154. Zachary Nosker, Yasunori Kobori, Haruo Kobayashi, Kiichi Niitsu, Nobukazu Takai, Takahiro Odaguchi, Isao Nakanishi, Kenji Nemoto, and Jun-ichi Matsuda, "A Fully Integrated Low Input Voltage Self Starting Charge Pump Circuit for Boost Regulator Bootstrap Startup", in Proc. International Conference on Advanced Micro-Device Engineering, Dec. 2012, L04.  
  155. Kazunori Sakuma, Kiichi Niitsu, Naohiro Harigai, Daiki Hirabayashi, Nobukazu Takai, Takahiro J. Yamaguchi, and Haruo Kobayashi, "Analysis of Jitter in Delay Line for High-Accuracy On-chip Jitter Measurements", in Proc. International Conference on Advanced Micro-Device Engineering, p.57, Dec.2012. 
  156. Yu Liu, Haruo Kobayashi, Tatsuji Matsuura, Oamu Kobayashi, Nobukazu Takai, and Kiichi Niitsu, "Self-Calibration Technique of Cyclic ADC", in Proc. International Conference on Advanced Micro-Device Engineering, p.56, Dec.2012. 
  157. Naohiro Harigai, Kiichi Niitsu, Daiki Hirabayashi, Masato Sakurai, Yusuke Osawa, Takahiro J. Yamaguchi, and Haruo Kobayashi, "A Study on Design for High-Speed Operation in a Cascaded Open-Loop Time Amplifier", in Proc. International Conference on Advanced Micro-Device Engineering, p,52, Dec.2012. 
  158. Yohei Tan, Daiki Oki, Yu Liu, Zachary Nosker, Haruo Kobayashi, Osamu Kobayashi, Tatsuji Matsuura, Atsuhiro Katayama, Li Quan, Ensi Li, Kiichi Niitsu, and Nobukazu Takai, "Self-Calibration Technique of Pipeline ADC Using Cyclic Configuration", in Proc. International Conference on Advanced Micro-Device Engineering, p.51, Dec.2012. 
  159. Kiichi Niitsu, Takahiro J. Yamaguchi, Masahiro Ishida, and Haruo Kobayashi, "Post-Silicon Jitter Measurements," 2012 IEEE 21st Asian Test Symposium (ATS 2012), pp.258-263, Nov.2012.  
    DOI: