A 1Tb/s 3W inductive-coupling transceiver for inter-chip clock and data link. - Noriyuki Miura; Daisuke Mizoguchi; Mari Inoue; Kiichi Niitsu; Yoshihiro Nakagawa; Masamoto Tago; Muneo Fukaishi; Takayasu Sakurai; Tadahiro Kuroda (ISSCC, 2006)

Daisy Chain Transmitter for Power Reduction in Inductive-Coupling CMOS Link. - Kiichi Niitsu; Noriyuki Miura; Mari Inoue; Yoshihiro Nakagawa; Masamoto Tago; Masayuki Mizuno; Takayasu Sakurai; Tadahiro Kuroda (IEICE Trans. Electron., 2007)

A 1 Tb/s 3 W Inductive-Coupling Transceiver for 3D-Stacked Inter-Chip Clock and Data Link. - Noriyuki Miura; Daisuke Mizoguchi; Mari Inoue; Kiichi Niitsu; Yoshihiro Nakagawa; Masamoto Tago; Muneo Fukaishi; Takayasu Sakurai; Tadahiro Kuroda (IEEE J. Solid State Circuits, 2007)

A 0.14 pJ/b Inductive-Coupling Transceiver With Digitally-Controlled Precise Pulse Shaping. - Noriyuki Miura; Hiroki Ishikuro; Kiichi Niitsu; Takayasu Sakurai; Tadahiro Kuroda (IEEE J. Solid State Circuits, 2008)

MuCCRA-Cube: A 3D dynamically reconfigurable processor with inductive-coupling link. - Shotaro Saito; Yoshinori Kohama; Yasufumi Sugimori; Yohei Hasegawa; Hiroki Matsutani; Toru Sano; Kazutaka Kasuga; Yoichi Yoshida; Kiichi Niitsu; Noriyuki Miura; Tadahiro Kuroda; Hideharu Amano (FPL, 2009)

An inductive-coupling link for 3D integration of a 90nm CMOS processor and a 65nm CMOS SRAM. - Kiichi Niitsu; Yasuhisa Shimazaki; Yasufumi Sugimori; Yoshinori Kohama; Kazutaka Kasuga; Itaru Nonomura; Makoto Saen; Shigenobu Komatsu; Kenichi Osada; Naohiko Irie; Toshihiro Hattori; Atsushi Hasegawa; et al. (ISSCC, 2009)

A 750 Mb/s, 12 pJ/b, 6-to-10 GHz CMOS IR-UWB Transmitter With Embedded On-Chip Antenna. - Vishal V. Kulkarni; Muhammad Muqsith; Kiichi Niitsu; Hiroki Ishikuro; Tadahiro Kuroda (IEEE J. Solid State Circuits, 2009)

Stochastic TDC architecture with self-calibration. - Satoshi Ito; Shigeyuki Nishimura; Haruo Kobayashi 001; Satoshi Uemori; Yohei Tan; Nobukazu Takai; Takahiro J. Yamaguchi; Kiichi Niitsu (APCCAS, 2010)

SAR ADC that is configurable to optimize yield. - Tomohiko Ogawa; Haruo Kobayashi 001; Yohei Tan; Satoshi Ito; Satoshi Uemori; Nobukazu Takai; Kiichi Niitsu; Takahiro J. Yamaguchi; Tatsuji Matsuura; Nobuyoshi Ishikawa (APCCAS, 2010)

ADC linearity test signal generation algorithm. - Satoshi Uemori; Takahiro J. Yamaguchi; Satoshi Ito; Yohei Tan; Haruo Kobayashi 001; Nobukazu Takai; Kiichi Niitsu; Nobuyoshi Ishikawa (APCCAS, 2010)

3-D System Integration of Processor and Multi-Stacked SRAMs Using Inductive-Coupling Link. - Makoto Saen; Kenichi Osada; Yasuyuki Okuma; Kiichi Niitsu; Yasuhisa Shimazaki; Yasufumi Sugimori; Yoshinori Kohama; Kazutaka Kasuga; Itaru Nonomura; Naohiko Irie; Toshihiro Hattori; Atsushi Hasegawa; et al. (IEEE J. Solid State Circuits, 2010)

Modeling and Experimental Verification of Misalignment Tolerance in Inductive-Coupling Inter-Chip Link for Low-Power 3-D System Integration. - Kiichi Niitsu; Yoshinori Kohama; Yasufumi Sugimori; Kazutaka Kasuga; Kenichi Osada; Naohiko Irie; Hiroki Ishikuro; Tadahiro Kuroda (IEEE Trans. Very Large Scale Integr. Syst., 2010)

An on-chip timing jitter measurement circuit using a self-referenced clock and a cascaded time difference amplifier with duty-cycle compensation. - Kiichi Niitsu; Masato Sakurai; Naohiro Harigai; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (A-SSCC, 2011)

Analysis of jitter accumulation in interleaved phase frequency detectors for high-accuracy on-chip jitter measurements. - Masato Sakurai; Kiichi Niitsu; Naohiro Harigai; Daiki Hirabayashi; Daiki Oki; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (ISOCC, 2011)

Design for Testability That Reduces Linearity Testing Time of SAR ADCs. - Tomohiko Ogawa; Haruo Kobayashi 001; Satoshi Uemori; Yohei Tan; Satoshi Ito; Nobukazu Takai; Takahiro J. Yamaguchi; Kiichi Niitsu (IEICE Trans. Electron., 2011)

A 14-GHz AC-Coupled Clock Distribution Scheme With Phase Averaging Technique Using Single LC-VCO and Distributed Phase Interpolators. - Kiichi Niitsu; Vishwesh V. Kulkarni; Shinmo Kang; Hiroki Ishikuro; Tadahiro Kuroda (IEEE Trans. Very Large Scale Integr. Syst., 2011)

Analysis and Techniques for Mitigating Interference From Power/Signal Lines and to SRAM Circuits in CMOS Inductive-Coupling Link for Low-Power 3-D System Integration. - Kiichi Niitsu; Yasufumi Sugimori; Yoshinori Kohama; Kenichi Osada; Naohiko Irie; Hiroki Ishikuro; Tadahiro Kuroda (IEEE Trans. Very Large Scale Integr. Syst., 2011)

DC-DC converter with continuous-time feed-forward Sigma-Delta modulator control. - Hong Gao 006; Lin Xing; Yasunori Kobori; Feng Zhao; Haruo Kobayashi 001; Shyunsuke Miwa; Atsushi Motozawa; Zachary Nosker; Kiichi Niitsu; Nobukazu Takai; Takahiro Odaguchi; Isao Nakanishi; et al. (APCCAS, 2012)

Digitally-controlled Gm-C bandpass filter. - Guanglei Jin; Hao Chen; Chuan Gao; Yunpeng Zhang; Haruo Kobayashi 001; Nobukazu Takai; Kiichi Niitsu; Khayrollah Hadidi (APCCAS, 2012)

Single inductor dual output DC-DC converter design with exclusive control. - Yasunori Kobori; Qiulin Zhu; Murong Li; Feng Zhao; Zachary Nosker; Shu Wu; Shaiful N. Mohyar; Masanori Onozawa; Haruo Kobayashi 001; Nobukazu Takai; Kiichi Niitsu; Takahiro Odaguchi; et al. (APCCAS, 2012)

Multi-bit sigma-delta TDC architecture with self-calibration. - Satoshi Uemori; Masamichi Ishii; Haruo Kobayashi 001; Yuta Doi; Osamu Kobayashi; Tatsuji Matsuura; Kiichi Niitsu; Yuta Arakawa; Daiki Hirabayashi; Yuji Yano; Tatsuhiro Gake; Nobukazu Takai; et al. (APCCAS, 2012)

A reference-free on-chip timing jitter measurement circuit using self-referenced clock and a cascaded time difference amplifier in 65nm CMOS. - Kiichi Niitsu; Masato Sakurai; Naohiro Harigai; Daiki Hirabayashi; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (ASP-DAC, 2012)

Two-Tone Signal Generation for Communication Application ADC Testing. - Keisuke Kato; Fumitaka Abe; Kazuyuki Wakabayashi; Chuan Gao; Takafumi Yamada; Haruo Kobayashi 001; Osamu Kobayashi; Kiichi Niitsu (Asian Test Symposium, 2012)

Post-Silicon Jitter Measurements. - Kiichi Niitsu; Takahiro J. Yamaguchi; Masahiro Ishida; Haruo Kobayashi 001 (Asian Test Symposium, 2012)

A New Procedure for Measuring High-Accuracy Probability Density Functions. - Takahiro J. Yamaguchi; Kunihiro Asada; Kiichi Niitsu; Mohamed Abbas; Satoshi Komatsu; Haruo Kobayashi 001; Jose A. Moreira (Asian Test Symposium, 2012)

A clock jitter reduction circuit using gated phase blending between self-delayed clock edges. - Kiichi Niitsu; Naohiro Harigai; Daiki Hirabayashi; Daiki Oki; Masato Sakurai; Osamu Kobayashi; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (VLSIC, 2012)

Low-Distortion Sinewave Generation Method Using Arbitrary Waveform Generator. - Kazuyuki Wakabayashi; Keisuke Kato; Takafumi Yamada; Osamu Kobayashi; Haruo Kobayashi 001; Fumitaka Abe; Kiichi Niitsu (J. Electron. Test., 2012)

CMOS Circuits to Measure Timing Jitter Using a Self-Referenced Clock and a Cascaded Time Difference Amplifier With Duty-Cycle Compensation. - Kiichi Niitsu; Masato Sakurai; Naohiro Harigai; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (IEEE J. Solid State Circuits, 2012)

A 65fJ/b Inter-Chip Inductive-Coupling Data Transceivers Using Charge-Recycling Technique for Low-Power Inter-Chip Communication in 3-D System Integration. - Kiichi Niitsu; Shusuke Kawai; Noriyuki Miura; Hiroki Ishikuro; Tadahiro Kuroda (IEEE Trans. Very Large Scale Integr. Syst., 2012)

Design of a clock jitter reduction circuit using gated phase blending between self-delayed clock edges. - Kiichi Niitsu; Naohiro Harigai; Daiki Hirabayashi; Daiki Oki; Masato Sakurai; Osamu Kobayashi; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (ASP-DAC, 2013)

Multi-bit Sigma-Delta TDC Architecture with Improved Linearity. - Satoshi Uemori; Masamichi Ishii; Haruo Kobayashi 001; Daiki Hirabayashi; Yuta Arakawa; Yuta Doi; Osamu Kobayashi; Tatsuji Matsuura; Kiichi Niitsu; Yuji Yano; Tatsuhiro Gake; Takahiro J. Yamaguchi; et al. (J. Electron. Test., 2013)

Design methodology for determining the number of stages in a cascaded time amplifier to minimize area consumption. - Kiichi Niitsu; Naohiro Harigai; Haruo Kobayashi 001 (IEICE Electron. Express, 2013)

Two-Tone Signal Generation for ADC Testing. - Keisuke Kato; Fumitaka Abe; Kazuyuki Wakabayashi; Chuan Gao; Takafumi Yamada; Haruo Kobayashi 001; Osamu Kobayashi; Kiichi Niitsu (IEICE Trans. Electron., 2013)

A Feed-Forward Time Amplifier Using a Phase Detector and Variable Delay Lines. - Kiichi Niitsu; Naohiro Harigai; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (IEICE Trans. Electron., 2013)

Live demonstration: An extended-gate CMOS sensor array with enzyme-immobilized microbeads for redox-potential glucose detection. - Hayato Komori; Kiichi Niitsu; Junko Tanaka; Yu Ishige; Masao Kamahori; Kazuo Nakazato (BioCAS, 2014)

An extended-gate CMOS sensor array with enzyme-immobilized microbeads for redox-potential glucose detection. - Hayato Komori; Kiichi Niitsu; Junko Tanaka; Yu Ishige; Masao Kamahori; Kazuo Nakazato (BioCAS, 2014)

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. - Shoko Ota; Kiichi Niitsu; Hiroki Kondo; Masaru Hori; Kazuo Nakazato (BioCAS, 2014)

A CMOS sensor platform with 1.2 µm × 2.05 µm electroless-plated 1024 × 1024 microelectrode array for high-sensitivity rapid direct bacteria counting. - Shoko Ota; Kiichi Niitsu; Hiroki Kondo; Masaru Hori; Kazuo Nakazato (BioCAS, 2014)

Charge-conserved analog-to-time converter for a large-scale CMOS biosensor array. - Masayuki Takihi; Kiichi Niitsu; Kazuo Nakazato (ISCAS, 2014)

A low-offset cascaded time amplifier with reconfigurable inter-stage connection. - Kiichi Niitsu; Naohiro Harigai; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (IEICE Electron. Express, 2014)

Finite aperture time effects in sampling circuit. - Miho Arai; Isao Shimizu; Haruo Kobayashi 001; Keita Kurihara; Shu Sasaki; Shohei Shibuya; Kiichi Niitsu; Kazuyoshi Kubo (ASICON, 2015)

Noise-immune current-integration-based CMOS amperometric sensor platform with 1.2 μm × 2.05 μm electroless-plated microelectrode array for robust bacteria counting. - Kohei Gamo; Kiichi Niitsu; Kazuo Nakazato (BioCAS, 2015)

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. - Kiichi Niitsu; Atsuki Kobayashi; Yudai Ogawa; Matsuhiko Nishizawa; Kazuo Nakazato (BioCAS, 2015)

Development of Microelectrode Arrays Using Electroless Plating for CMOS-Based Direct Counting of Bacterial and HeLa Cells. - Kiichi Niitsu; Shoko Ota; Kohei Gamo; Hiroki Kondo; Masaru Hori; Kazuo Nakazato (IEEE Trans. Biomed. Circuits Syst., 2015)

A CMOS PWM Transceiver Using Self-Referenced Edge Detection. - Kiichi Niitsu; Yusuke Osawa; Naohiro Harigai; Daiki Hirabayashi; Osamu Kobayashi; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (IEEE Trans. Very Large Scale Integr. Syst., 2015)

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. - Kiichi Niitsu; Atsuki Kobayashi; Yudai Ogawa; Matsuhiko Nishizawa; Kazuo Nakazato (ASP-DAC, 2016)

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. - Kohei Gamo; Kazuo Nakazato; Kiichi Niitsu (BioCAS, 2016)

Live demonstration: Current-mode analog-to-time converter for a large scale CMOS biosensor array. - Kei Ikeda; Atsuki Kobayashi; Kazuo Nakazato; Kiichi Niitsu (BioCAS, 2016)

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. - Atsuki Kobayashi; Kei Ikeda; Yudai Ogawa; Matsuhiko Nishizawa; Kazuo Nakazato; Kiichi Niitsu (BioCAS, 2016)

A current-mode analog-to-time converter with short-pulse output capability using local intra-cell activation for high-speed time-domain biosensor array. - Kei Ikeda; Atsuki Kobayashi; Kazuo Nakazato; Kiichi Niitsu (NORCAS, 2016)

Well-Shaped Microelectrode Array Structure for High-Density CMOS Amperometric Electrochemical Sensor Array. - Kiichi Niitsu; Tsuyoshi Kuno; Masayuki Takihi; Kazuo Nakazato (IEICE Trans. Electron., 2016)

A current-integration-based CMOS amperometric sensor with 1.2 μm × 2.05 μm electroless-plated microelectrode array for high-sensitivity bacteria counting. - Kohei Gamo; Kazuo Nakazato; Kiichi Niitsu (ASP-DAC, 2017)

A scalable time-domain biosensor array using logarithmic cyclic time-attenuation-based TDC for high-resolution and large-scale bio-imaging. - Kei Ikeda; Atsuki Kobayashi; Kazuo Nakazato; Kiichi Niitsu (ASP-DAC, 2017)

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. - Atsuki Kobayashi; Kei Ikeda; Yudai Ogawa; Matsuhiko Nishizawa; Kazuo Nakazato; Kiichi Niitsu (ASP-DAC, 2017)

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. - Taiki Nakanishi; Maya Matsunaga; Atsuki Kobayashi; Kazuo Nakazato; Kiichi Niitsu (BioCAS, 2017)

Application of magnetic arrangement of microbeads for CMOS biosensor array sensitivity. - Eizo Ushijima; Satoshi Fujimoto; Kiichi Niitsu; Kazuo Nakazato (BioCAS, 2017)

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. - Kei Ikeda; Atsuki Kobayashi; Kiichi Niitsu (ICECS, 2017)

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. - Yuya Nishio; Atsuki Kobayashi; Kiichi Niitsu (ICECS, 2017)

Three-dimensional millimeter-wave frequency-shift-based CMOS biosensor using vertically stacked LC oscillators. - Maya Matsunaga; Taiki Nakanishi; Atsuki Kobayashi; Kazuo Nakazato; Kiichi Niitsu (NORCAS, 2017)

A Current-Integration-Based CMOS Amperometric Sensor with 1024 × 1024 Bacteria-Sized Microelectrode Array for High-Sensitivity Bacteria Counting. - Kohei Gamo; Kazuo Nakazato; Kiichi Niitsu (IEICE Trans. Electron., 2017)

Design and Analysis of Scalability in Current-Mode Analog-to-Time Converter for an Energy-Efficient and High-Resolution CMOS Biosensor Array. - Kei Ikeda; Atsuki Kobayashi; Kazuo Nakazato; Kiichi Niitsu (IEICE Trans. Electron., 2017)

Sub-1-V CMOS-Based Electrophoresis Using Electroless Gold Plating for Small-Form-Factor Biomolecule Manipulation. - Yuuki Yamaji; Kazuo Nakazato; Kiichi Niitsu (IEICE Trans. Electron., 2017)

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. - Atsuki Kobayashi; Kei Ikeda; Yudai Ogawa; Hiroyuki Kai; Matsuhiko Nishizawa; Kazuo Nakazato; Kiichi Niitsu (IEEE Trans. Biomed. Circuits Syst., 2017)

A Constant-Power Inductive-Coupling Transmitter Using Auxiliary Driving Technique in 65nm SOTB CMOS for Low-Power Supply-Sensing Biosensing Platform toward Healthcare IoTs. - Yuya Nishio; Atsuki Kobayashi; Kiichi Niitsu (APCCAS, 2018)

A BER-Modulated Inductive-Coupling Transceiver Using Dynamic Intermediate Interference Control Technique for Low-Power Communication. - Ge Xu; Kenya Hayashi; Shigeki Arata; Shunya Murakami; Cong Dang Bui; Atsuki Kobayashi; Kiichi Niitsu (APCCAS, 2018)

A 385μm × 385μm 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. - Kenya Hayashi; Shigeki Arata; Ge Xu; Shunya Murakami; Cong Dang Bui; Takuyoshi Doike; Maya Matsunaga; Atsuki Kobayashi; Kiichi Niitsu (BioCAS, 2018)

Live Demonstration: 385 × 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. - Kenya Hayashi; Shigeki Arata; Ge Xu; Shunya Murakami; Cong Dang Bui; Atsuki Kobayashi; Kiichi Niitsu (BioCAS, 2018)

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. - Atsuki Kobayashi; Yuya Nishio; Kenya Hayashi; Kazuo Nakazato; Kiichi Niitsu (CICC, 2018)

A Blood Glucose Level Prediction System Using Machine Learning Based on Recurrent Neural Network for Hypoglycemia Prevention. - Takuyoshi Doike; Kenya Hayashi; Shigeki Arata; Karim Nissar Mohammad; Atsuki Kobayashi; Kiichi Niitsu (NEWCAS, 2018)

Demonstration of 2D Optical Imaging Using Photosystem I Photosensor Platform with 3232 CMOS Biosensor Array. - Kiichi Niitsu; Taichi Sakabe; Mariko Miyachi; Yoshinori Yamanoi; Hiroshi Nishihara; Tatsuya Tomo; Kazuo Nakazato (NEWCAS, 2018)

A 6.1-nA Fully Integrated CMOS Supply Modulated OOK Transmitter in 55-nm DDC CMOS for Glasses-Free, Self-Powered, and Fuel-Cell-Embedded Continuous Glucose Monitoring Contact Lens. - Kenya Hayashi; Shigeki Arata; Shunya Murakami; Yuya Nishio; Atsuki Kobayashi; Kiichi Niitsu (IEEE Trans. Circuits Syst. II Express Briefs, 2018)

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. - Kiichi Niitsu; Atsuki Kobayashi; Yuya Nishio; Kenya Hayashi; Kei Ikeda; Takashi Ando; Yudai Ogawa; Hiroyuki Kai; Matsuhiko Nishizawa; Kazuo Nakazato (IEEE Trans. Circuits Syst. I Regul. Pap., 2018)

AI-Based Edge-Intelligent Hypoglycemia Prediction System Using Alternate Learning and Inference Method for Blood Glucose Level Data with Low-periodicity. - Tran Minh Quan; Takuyoshi Doike; Cong Dang Bui; Kenya Hayashi; Shigeki Arata; Atsuki Kobayashi; Md. Zahidul Islam; Kiichi Niitsu (AICAS, 2019)

LC-Voltage-Controlled-Oscillator-Based Biosensor in 180-nm CMOS Process Targeting β-Dispersion for Detecting Exosomes. - Shunya Murakami; Taiki Nakanishi; Atsuki Kobayashi; Md. Zahidul Islam; Kiichi Niitsu (APCCAS, 2019)

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. - Kenya Hayashi; Shigeki Arata; Ge Xu; Shunya Murakami; Cong Dang Bui; Takuyoshi Doike; Maya Matsunaga; Atsuki Kobayashi; Kiichi Niitsu (ASP-DAC, 2019)

Design of gate-leakage-based timer using an amplifier-less replica-bias switching technique in 55-nm DDC CMOS. - Atsuki Kobayashi; Yuya Nishio; Kenya Hayashi; Shigeki Arata; Kiichi Niitsu (ASP-DAC, 2019)

A three-dimensional millimeter-wave frequency-shift based CMOS biosensor using vertically stacked spiral inductors in LC oscillators. - Maya Matsunaga; Taiki Nakanishi; Atsuki Kobayashi; Kiichi Niitsu (ASP-DAC, 2019)

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. - Taiki Nakanishi; Maya Matsunaga; Shunya Murakami; Atsuki Kobayashi; Kiichi Niitsu (ASP-DAC, 2019)

2D optical imaging using photosystem I photosensor platform with 32x32 CMOS biosensor array. - Kiichi Niitsu; Taichi Sakabe; Mariko Miyachi; Yoshinori Yamanoi; Hiroshi Nishihara; Tatsuya Tomo; Kazuo Nakazato (ASP-DAC, 2019)

A low-voltage CMOS electrophoresis IC using electroless gold plating for small-form-factor biomolecule manipulation. - Kiichi Niitsu; Yuuki Yamaji; Atsuki Kobayashi; Kazuo Nakazato (ASP-DAC, 2019)

A 2.1-nW Burst-Pulse-Counting Supply Voltage Monitor for Biofuel-Cell-Combined Biosensing Systems in 180-nm CMOS. - Atsuki Kobayashi; Kenya Hayashi; Shigeki Arata; Shunya Murakami; Ge Xu; Md. Zahidul Islam; Kiichi Niitsu (BioCAS, 2019)

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. - Atsuki Kobayashi; Kenya Hayashi; Shigeki Arata; Shunya Murakami; Cong Dang Bui; Tran Minh Quan; Md. Zahidul Islam; Kiichi Niitsu (ICECS, 2019)

Verification of Inductive-Coupling-Based CMOS Biosensor Focusing on Dielectric Loss of β-Dispersion for Detecting Exosomes Through Electromagnetic Simulation. - Shunya Murakami; Taiki Nakanishi; Atsuki Kobayashi; Md. Zahidul Islam; Kiichi Niitsu (ICECS, 2019)

A 65-nm CMOS 1.4-nW Self-Controlled Dual-Oscillator-Based Supply Voltage Monitor for Biofuel-Cell-Combined Biosensing Systems. - Atsuki Kobayashi; Kenya Hayashi; Shigeki Arata; Shunya Murakami; Ge Xu; Kiichi Niitsu (ISCAS, 2019)

A 40-GHz Fully-Integrated CMOS-Based Biosensor Circuit with an On-Chip Vector Network Analyzer for Circulating Tumor Cells Analysis. - Taiki Nakanishi; Shunya Murakami; Atsuki Kobayashi; Md. Zahidul Islam; Kiichi Niitsu (NORCAS, 2019)

Design and theoretical analysis of a clock jitter reduction circuit using gated phase blending between self-delayed clock edges. - Kiichi Niitsu; Osamu Kobayashi; Takahiro J. Yamaguchi; Haruo Kobayashi 001 (IEICE Electron. Express, 2019)

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. - Kenya Hayashi; Shigeki Arata; Ge Xu; Shunya Murakami; Cong Dang Bui; Atsuki Kobayashi; Kiichi Niitsu (IEICE Trans. Electron., 2019)

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. - Kenya Hayashi; Shigeki Arata; Ge Xu; Shunya Murakami; Cong Dang Bui; Atsuki Kobayashi; Kiichi Niitsu (IEICE Trans. Electron., 2019)

Design and Calibration of a Small-Footprint, Low-Frequency, and Low-Power Gate Leakage Timer Using Differential Leakage Technique. - Yuya Nishio; Atsuki Kobayashi; Kiichi Niitsu (IEICE Trans. Electron., 2019)

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. - Atsuki Kobayashi; Kenya Hayashi; Shigeki Arata; Shunya Murakami; Ge Xu; Kiichi Niitsu (IEEE Trans. Biomed. Circuits Syst., 2019)

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. - Kiichi Niitsu; Taiki Nakanishi; Shunya Murakami; Maya Matsunaga; Atsuki Kobayashi; Karim Nissar Mohammad; Jun Ito; Naoya Ozawa; Tetsunari Hase; Hiromasa Tanaka; Mitsuo Sato; Hiroki Kondo; et al. (IEEE Trans. Biomed. Circuits Syst., 2019)

A 72-nW 440-mV Time Register Using Stacked-NMOS-Switched Gated Delay Cell in Biomedical Applications. - Guowei Chen; Cong Dang Bui; Xinyang Yu; Md. Zahidul Islam; Atsuki Kobayashi; Kiichi Niitsu (APCCAS, 2020)

Widely Tunable CMOS-Based Biosensor With an Active-Inductor-Based VCO for Detecting CTCs and Exosomes. - Shunya Murakami; Takuya Tsujimura; Guowei Chen; Md. Zahidul Islam; Kiichi Niitsu (ICECS, 2020)

Design of 33 GHz 65-nm-CMOS Small-Formfactor Direct-Conversion Receiver for Non-Invasive Continuous Glucose Monitoring. - Takuya Tsujimura; Shunya Murakami; Guowei Chen; Kiichi Niitsu (ICECS, 2020)

Design of Fully-Integrated Self-Powered FM Transmitter Using On-Chip Photodiodes in 65-nm CMOS. - Kosuke Uchiyama; Guowei Chen; Kiichi Niitsu (ICECS, 2020)

Simulation Study of Full Passive Magnetic Human Body Communication in 65-nm CMOS Technology for Temperature Sensing Application. - Sitong Ye; Atsuki Kobayashi; Guowei Chen; Kiichi Niitsu (ICECS, 2020)

Low-Voltage Gate-Leakage-Based Timer Using an Amplifier-Less Replica-Bias Switching Technique in 55-nm DDC CMOS. - Atsuki Kobayashi; Kiichi Niitsu (IEEE Open J. Circuits Syst., 2020)

A 22nm CMOS 0.2V 13.3nW 16T SRAM Using Dynamic Leakage Suppression and Half-Selected Free Technique. - Yue Wang; Guowei Chen; Xinyang Yu; Xujiaming Chen; Kiichi Niitsu (APCCAS, 2021)

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. - Guowei Chen; Xinyang Yu; Yue Wang; Tran Minh Quan; Naofumi Matsuyama; Takuya Tsujimura; Md. Zahidul Islam; Kiichi Niitsu (ESSDERC, 2021)

A 4.8mW 22nm CMOS Fully-Integrated 60-GHz $3 times 3 times 2$ 3D Frequency-Shift Biosensor Array Using Vertically-Stacked LC Oscillators. - Akiyoshi Tanaka; Guowei Chen; Kiichi Niitsu (ICECS, 2021)

A 0.2V 0.97nW 0.011mm2 Fully-Passive mHBC Tag Using Intermediate Interference Modulation in 65nm CMOS. - Akiyoshi Tanaka; Guowei Chen; Sitong Ye; Kiichi Niitsu (ICECS, 2021)

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. - Guowei Chen; Xinyang Yu; Yue Wang; Tran Minh Quan; Naofumi Matsuyama; Takuya Tsujimura; Kiichi Niitsu (ASP-DAC, 2022)

A 52.3% Peak Efficiency 22nm CMOS Low-Power Light-Adaptive Self-Oscillating Voltage Doubler Using Scalable Dynamic Leakage-Suppression Logic. - Xujiaming Chen; Guowei Chen; Xinyang Yu; Yue Wang; Kiichi Niitsu (LASCAS, 2022)

22nm CMOS pW Standby Power Flip-Flops with/without Security using Dynamic Leakage Suppression Logic. - Duong Nghiep Huy; Guowei Chen; Kiichi Niitsu (LASCAS, 2022)

An Ultra-Low Power 22 nm Self-Oscillating Voltage Doubler With Dynamic Leakage-Suppression Logic. - Sora Kato; Guowei Chen; Kiichi Niitsu (LASCAS, 2022)

A 0.00023 mm² 1.2V 0.48mW 18GHz Passive-Less Digital Wireless Transmitter with On-Chip Antenna in 22nm Bulk CMOS. - Shinichi Ito; Akiyoshi Tanaka; Guowei Chen; Xujiaming Chen; Kiichi Niitsu (MWSCAS, 2022)

A 4.8-mW Label-free Frequency-shift 3×3×2 3D Biosensor Array with Vertically-stacked 60-GHz LC Oscillators in 22-nm CMOS. - Akiyoshi Tanaka; Guowei Chen; Kiichi Niitsu (MWSCAS, 2022)

A Solar-Cell-Assisted, 99% Biofuel Cell Area Reduced, Biofuel-Cell-Powered Wireless Biosensing System in 65nm CMOS for Continuous Glucose Monitoring Contact Lenses. - Guowei Chen; Kiichi Niitsu (IEICE Trans. Electron., 2022)

A 4.5-mW 22-nm CMOS Label-Free Frequency-Shift 3 × 3 × 2 3-D Biosensor Array Using Vertically Stacked 60-GHz LC Oscillators. - Akiyoshi Tanaka; Guowei Chen; Kiichi Niitsu (IEEE Trans. Circuits Syst. II Express Briefs, 2022)

Design and Experimental Verification of a 2.1nW 0.018mm2 Slope ADC-Based Supply Voltage Monitor for Biofuel-Cell-Powered Supply-Sensing Systems in 180-nm CMOS. - Guowei Chen; Xujiaming Chen; Kiichi Niitsu (IEICE Trans. Electron., 2022)

A 0.063-mm2 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. - Akiyoshi Tanaka; Guowei Chen; Kiichi Niitsu (BioCAS, 2023)

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. - Guowei Chen; Akiyoshi Tanaka; Kiichi Niitsu (ISCAS, 2023)

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. - Kiichi Niitsu; Koki Fukushima; Yuichi Hiraoka; Hidenori Urawa; Yutaka Ozawa; Yuya Osaki; Masaya Kaneko; Jin Nakamura; Hideo Yoshikawa (LASCAS, 2024)

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. - Hiroaki Kitaike; Hironori Tagawa; Masaya Kaneko; Jin Nakamura; Shufan Xu; Ruilin Zhang; Kunyang Liu; Hiroki Wakatsuchi; Kyoya Takano; Hirofumi Shinohara; Kiichi Niitsu (NorCAS, 2024)

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 an Oscillator and Frequency Dividers for Scaling-Friendly IoTs. - You Wu; Kei Awano; Kento Okamura; Teruaki Ono; Kohei Sakamoto; Hiroaki Kitaike; Hironori Tagawa; Jin Nakamura; Masaya Kaneko; Yuta Kimura; Hiroaki Nakamura; Shufan Xu; et al. (NorCAS, 2024)

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. - Hiroaki Kitaike; Masaharu Inada; Mitsuru Terauchi; Hironori Tagawa; Ryosuke Nagai; Shufan Xu; Ruilin Zhang; Kunyang Liu; Kiichi Niitsu (VLSI Technology and Circuits, 2024)

De-Correlation and De-Bias Post-Processing Circuits for True Random Number Generator. - Ruilin Zhang; Haochen Zhang; Xingyu Wang 002; Ziyang Ye; Kunyang Liu; Shinichi Nishizawa; Kiichi Niitsu; Hirofumi Shinohara (IEEE Trans. Circuits Syst. I Regul. Pap., 2024)

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. - Hiroaki Kitaike; Hironori Tagawa; Shufan Xu; Ruilin Zhang; Kunyang Liu; Kiichi Niitsu (ASP-DAC, 2025)

A 22 nm CMOS 0.034 mm2 0.4 V 1.3 nW Frequency-Recording IC with 400-Bit Data-Storing Shift Registers Using Burst-Pulse Counting and Reference Pulse Generation for Stand-Alone Continuous Glucose Monitoring Contact Lenses. - Kei Awano; You Wu; Kento Okamura; Teruaki Ono; Kohei Sakamoto; Hiroaki Kitaike; Hironori Tagawa; Jin Nakamura; Masaya Kaneko; Yuta Kimura; Hiroaki Nakamura; Shufan Xu; et al. (LASCAS, 2025)