Kenichi Ohhata

29 papers C 1Journal 21Unranked 7
YearRankTypeTitle / Venue / Authors
2023 — conf
High-Precision Open-Loop Time Amplifier Using Current Regulator.
APCCAS
Yusuke Toyoshima, Ryosuke Kamiya, Kenichi Ohhata
2022 — conf
A High-Time-Resolution Time-to-Digital Converter Using Coupled Ring Oscillator with Phase Averaging.
APCCAS
Daiki Ogata, Ryosuke Kamiya, Yusuke Toyoshima, Kenichi Ohhata
2021 — conf
A PVT-Robust Closed-Loop Dynamic Amplifier Using Three-Stage Floating Inverter Amplifier.
APCCAS
Chiwen Cheng, Kenichi Ohhata
2019 J jnl
A 2.3-mW, 1-GHz, 8-Bit Fully Time-Based Two-Step ADC Using a High-Linearity Dynamic VTC.
IEEE J. Solid State Circuits
Kenichi Ohhata
2018 — conf
A 2.3-MW, 950-MHz, 8-Bit Fully-Time-Based Subranging ADC Using Highly-Linear Dynamic VTC.
VLSI Circuits
Kenichi Ohhata
2018 J jnl
A 900-MHz, 3.5-mW, 8-bit Pipelined Subranging ADC Combining Flash ADC and TDC.
IEEE Trans. Very Large Scale Integr. Syst.
Kenichi Ohhata, Daiki Hayakawa, Kenji Sewaki, Kento Imayanagida, Kouki Ueno, Yuuki Sonoda, Kenichiro Muroya
2018 — conf
Low-Power, High-Speed Time-Based Subranging ADCs.
ISPACS
Kenichi Ohhata
2014 J jnl
1-GHz, 17.5-mW, 8-bit Subranging ADC Using Offset-Cancelling Charge-Steering Amplifier.
IEICE Trans. Electron.
Kenichi Ohhata
2014 — conf
Automatic adjustment system for optical interconnection transmitter using improved particle swarm optimization.
ISIC
Kenichi Ohhata, Hiroki Nakahara, Takuya Inoue, Toru Yazaki, Norio Chujo, Takuma Nishimoto
2014 J jnl
Automatic technique of distortion compensation in resistor ladder for high-speed and low-power ADC.
IEICE Electron. Express
Wataru Yoshimura, Kenichi Ohhata
2011 J jnl
A 25 Gb/s 65-nm CMOS Low-Power Laser Diode Driver With Mutually Coupled Peaking Inductors for Optical Interconnects.
IEEE Trans. Circuits Syst. I Regul. Pap.
Norio Chujo, Toshiaki Takai, Toshiki Sugawara, Yasunobu Matsuoka, Daichi Kawamura, Koichiro Adachi, Tsuneo Kawamata, Tsuneo Ohno, Kenichi Ohhata
2011 J jnl
Low-Offset, Low-Power Latched Comparator Using Capacitive Averaging Technique.
IEICE Trans. Electron.
Kenichi Ohhata, Hiroki Date, Mai Arita
2010 C conf
17 Gb/s VCSEL driver using double-pulse asymmetric emphasis technique in 90-nm CMOS for optical interconnection.
ISCAS
Kenichi Ohhata, Hironori Imamura, Toshinobu Ohno, Takaya Taniguchi, Kiichi Yamashita, Toru Yazaki, Norio Chujo
2010 — conf
A 25Gb/s laser diode driver with mutually coupled peaking inductors for optical interconnects.
CICC
Norio Chujo, Tsuneo Kawamata, Kenichi Ohhata, Toshinobu Ohno
2009 J jnl
Design of a 770-MHz, 70-mW, 8-bit Subranging ADC Using Reference Voltage Precharging Architecture.
IEEE J. Solid State Circuits
Kenichi Ohhata, Koki Uchino, Yuichiro Shimizu, Kosuke Oyama, Kiichi Yamashita
2008 J jnl
Feedthrough reduction technique for track-and-hold circuit with body-bias control circuit.
IEICE Electron. Express
Kenichi Ohhata, Yuichiro Shimizu, Kiichi Yamashita
2008 J jnl
Sandwich Structure Type RF-MEMS Variable Capacitor with Low Voltage Controllability and Wide Tuning Range.
IEICE Trans. Commun.
Takuma Nishimoto, Kiichi Yamashita, Kenichi Ohhata
2007 J jnl
A 1-GHz, 56.3-dB SFDR CMOS track-and-hold circuit with body-bias control circuit.
IEICE Electron. Express
Kenichi Ohhata, Kosuke Yayama, Yuichiro Shimizu, Kiichi Yamashita
2006 J jnl
Design of Low-Noise, Low-Power 10-GHz VCO Using 0.18-µm CMOS Technology.
IEICE Trans. Electron.
Kenichi Ohhata, Katsuyoshi Harasawa, Makoto Honda, Kiichi Yamashita
2005 J jnl
SiGe-HBT-based 54-gb/s 4: 1 multiplexer IC with full-rate clock for serial communication systems.
IEEE J. Solid State Circuits
Toru Masuda, Kenichi Ohhata, Nobuhiro Shiramizu, Eiji Ohue, Katsuya Oda, Reiko Hayami, Hiromi Shimamoto, Masao Kondo, Takashi Harada, Katsuyoshi Washio
2000 J jnl
A 550-ps access 900-MHz 1-Mb ECL-CMOS SRAM.
IEEE J. Solid State Circuits
Hiroaki Nambu, Kazuo Kanetani, Kaname Yamasaki, Keiichi Higeta, Masami Usami, Masahiko Nishiyama, Kenichi Ohhata, Fumihiko Arakawa, Takeshi Kusunoki, Kunihiko Yamaguchi, Atsuo Hotta, Noriyuki Homma
2000 J jnl
Power reduction techniques for a 1-Mb ECL-CMOS SRAM with an access time of 550 ps and an operating frequency of 900 MHz.
IEEE J. Solid State Circuits
Kenichi Ohhata, Fumihiko Arakawa, Takeshi Kusunoki, Hiroaki Nambu, Kazuo Kanetani, Kaname Yamasaki, Keiichi Higeta, Masami Usami, Masahiko Nishiyama, Kunihiko Yamaguchi, Noriyuki Homma, Atsuo Hotta
1999 J jnl
A wide-dynamic-range, high-transimpedance Si bipolar preamplifier IC for 10-Gb/s optical fiber links.
IEEE J. Solid State Circuits
Kenichi Ohhata, Toru Masuda, Kazuo Imai, Ryoji Takeyari, Katsuyoshi Washio
1999 J jnl
Design of a 32.7-GHz bandwidth AGC amplifier IC with wide dynamic range implemented in SiGe HBT.
IEEE J. Solid State Circuits
Kenichi Ohhata, Toru Masuda, Eiji Ohue, Katsuyoshi Washio
1996 J jnl
A soft-error-immune 0.9-ns 1.15-Mb ECL-CMOS SRAM with 30-ps 120 k logic gates and on-chip test circuitry.
IEEE J. Solid State Circuits
Keiichi Higeta, Masami Usami, Masayuki Ohayashi, Yasuhiro Fujimura, Masahiko Nishiyama, Satoru Isomura, Kunihiko Yamaguchi, Youji Idei, Hiroaki Nambu, Kenichi Ohhata, Nadateru Hanta
1995 J jnl
A 0.65-ns, 72-kb ECL-CMOS RAM macro for a 1-Mb SRAM.
IEEE J. Solid State Circuits
Hiroalu Nambu, Kazuo Kanetani, Youji Idei, Tom Masuda, Keiichi Higeta, Masayuki Ohayashi, Masami Usami, Kunihiko Yamaguchi, Toshiyuki Kikuchi, Takahide Ikeda, Kenichi Ohhata, Takeshi Kusunoki, Noriyuki Homma
1992 J jnl
A 1.5-ns access time, 78- mu m
IEEE J. Solid State Circuits
Kunihiko Yamaguchi, Hiroaki Nambu, Kazuo Kanetani, Youji Idei, Noriyuki Homma, Toshiro Hiramoto, Nobuo Tamba, Kunihiko Watanabe, Masanori Odaka, Takahide Ikeda, Kenichi Ohhata, Yoshiaki Sakurai
1992 J jnl
High-speed sensing techniques for ultrahigh-speed SRAMs.
IEEE J. Solid State Circuits
Hiroaki Nambu, Kazuo Kanetani, Youji Idei, Noriyuki Homma, Kunihiko Yamaguchi, Toshiro Hiramoto, Nobuo Tamba, Masanori Odaka, Kunihiko Watanabe, Takahide Ikeda, Kenichi Ohhata, Yoshiaki Sakurai
1989 J jnl
An experimental soft-error-immune 64-kbit 3-ns ECL bipolar RAM.
IEEE J. Solid State Circuits
Kunihiko Yamaguchi, Hiroaki Nanbu, Kazuo Kanetani, Noriyuki Homma, Tohru Nakamura, Kenichi Ohhata, Akihisa Uchida, Katsumi Ogiue