A widely tunable Gm-C filter using tail current offset in two differential pairs. - Tomoyuki Tanaka; Sungwoo Cha; Shinsaku Shimizu; Tsukasa Ida; Hiroaki Ishihara; Toshimasa Matsuoka; Kenji Taniguchi 001; Akashi Sugimori; Hiroki Hihara (ISCAS (1), 2005)

0.13 μm CMOS Cartesian loop transmitter IC with fast calibration and switching scheme from opened to closed loop. - Shoji Otaka; Masahiro Hosoya; Hiroaki Ishihara; Toru Hashimoto; Yuta Araki (ESSCIRC, 2008)

A 10MHz signal bandwidth Cartesian-loop transmitter capable of off-chip PA linearization. - Hiroaki Ishihara; Masahiro Hosoya; Shoji Otaka; Osamu Watanabe 003 (ISSCC, 2010)

A 10-MHz Signal Bandwidth Cartesian Loop Transmitter Capable of Off-Chip PA Linearization. - Hiroaki Ishihara; Masahiro Hosoya; Shoji Otaka; Osamu Watanabe 003 (IEEE J. Solid State Circuits, 2010)

A 1.9/2.4GHz dual band CMOS power amplifier with integrated AM-PM distortion canceller. - Kohei Onizuka; Hiroaki Ishihara; Masahiro Hosoya; Shigehito Saigusa; Osamu Watanabe 003; Shoji Otaka (CICC, 2011)

A 130μA wake-up receiver SoC in 0.13μm CMOS for reducing standby power of an electric appliance controlled by an infrared remote controller. - Hiroaki Ishihara; Toshiyuki Umeda; Katsuya Ohno; Shigeyasu Iwata; Fumi Moritsuka; Tetsuro Itakura; Manabu Ishibe; Keijiro Hijikata; Yasunori Maki (ISSCC, 2011)

A 1.9 GHz CMOS Power Amplifier With Embedded Linearizer to Compensate AM-PM Distortion. - Kohei Onizuka; Hiroaki Ishihara; Masahiro Hosoya; Shigehito Saigusa; Osamu Watanabe 003; Shoji Otaka (IEEE J. Solid State Circuits, 2012)

18.8 A Fully-Generic-Process Galvanic Isolator for Gate Driver with 123mW 23% Power Transfer and Full-Triplex 21/14/0.5Mb/s Bidirectional Communication Utilizing Reference-Free Dual-Modulation FSK. - Hiroaki Ishihara; Kohei Onizuka (ISSCC, 2020)

18.7 A DC to 35MHz Fully Integrated Single-Power-Supply Isolation Amplifier for Current- and Voltage-Sensing Front-Ends of Power Electronics. - Satoshi Takaya; Hiroaki Ishihara; Kohei Onizuka (ISSCC, 2020)