A study of automatic measuring circuit suitable for very small phase difference measurement. - Takuro Noguchi; Sumio Fukai; Ichihiko Toyoda; Yohei Ishikawa; Akio Shimizu (ISPACS, 2015)

Multiple output variable overdrive voltage CMOS current mirror. - Koichi Saito; Akio Shimizu; Yohei Ishikawa; Takuro Noguchi; Sumio Fukai (ISOCC, 2017)

Headphone Amplifier and its Layout for Education for High School Student. - Chiharu Umezaki; Takashi Yoshitomi; Yohei Ishikawa; Akio Shimizu; Takuro Noguchi; Sumio Fukai (ISCAS, 2019)

A 10-bit Current-Steering DAC for Urinary Bladder Volume Measurement. - Yuki Nishimura; Akio Shimizu; Takuro Noguchi; Yohei Ishikawa; Sumio Fukai (APCCAS, 2021)

Urinary Bladder Volume Measurement System with Transimpedance Amplifier and Current-Steering DAC. - Akio Shimizu; Takuro Noguchi; Yohei Ishikawa; Sumio Fukai (MWSCAS, 2022)

A Micro-phase Difference Measurement Circuit Using 4-bit Input Stage. - Yuki Sasaki; Takuro Noguchi; Yohei Ishikawa; Sumio Fukai; Akio Shimizu (APCCAS, 2024)