Low voltage four-quadrant analog multiplier using square-root circuit based on CMOS pair. - Akira Hyogo; Y. Fukutomi; Keitaro Sekine (ISCAS (2), 1999)

A 1-MHz 7th-order continuous-time lowpass filter using very low distortion CMOS OTAs. - Eitake Ibaragi; Akira Hyogo; Keitaro Sekine (ISCAS, 2000)

A CMOS OTA free from second order effects with a high input resistance Gm control terminal. - Eitake Ibaragi; Soushirou Nishioka; Akira Hyogo; Keitaro Sekine (ISCAS (1), 2001)

Low-power ASK receiver circuit for wireless communication system. - Toru Yazaki; Hiroya Yamamoto; Akira Hyogo; Keitaro Sekine (APCCAS (2), 2002)

Experiences on an Open Source Translation Effort in Japan. - Hiroki Sato; Keitaro Sekine (BSDCon, 2002)

A Vt-zero equivalent MOSFET and its applications. - Hiroki Sato; Akira Hyogo; Keitaro Sekine (ISCAS (5), 2002)

2.4-GHz-Band CMOS RF Front-End Building Blocks at a 1.8-V Supply. - Hiroshi Komurasaki; Kazuya Yamamoto; Hideyuki Wakada; Tetsuya Heima; Akihiko Furukawa; Hisayasu Sato; Takahiro Miki; Naoyuki Kato; Akira Hyogo; Keitaro Sekine (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

A Digitally Programmable CMOS Universal Biquad Filter Using Current-Mode Integrators. - Yuhki Maruyama; Akira Hyogo; Keitaro Sekine (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

Foreword. - Keitaro Sekine (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

A 1.8-V 73-dB dynamic-range CMOS variable gain amplifier. - Ryutaro Saito; Kinya Hosoda; Akira Hyogo; Takaya Maruyama; Hiroshi Komuraki; Hisayasu Sato; Keitaro Sekine (ESSCIRC, 2003)

A CMOS Current-Mode Band-Pass Filter Using Q-Enhancement Technique. - Yuhki Maruyama; Akira Hyogo; Keitaro Sekine (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003)

An Equivalent MOSFET Cell Using Adaptively Biased Source-Coupled Pair. - Hiroki Sato; Akira Hyogo; Keitaro Sekine (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003)

A 2.0-V folding circuit using current limiting amplifier for ADC. - Takeshi Koike; Akira Hyogo; Keitaro Sekine (ECCTD, 2005)

A low voltage OTA using MOSFET in the triode region and cascode current mirror. - Hiroki Sato; Akira Hyogo; Keitaro Sekine (ECCTD, 2005)

A Design Approach for Low Phase Noise 5GHz Complementary Quadrature Oscillator. - Yukio Hattori; Hiroki Sato; Akira Hyogo; Keitaro Sekine (ICECS, 2006)

A High Impedance Current Source Using Active Resistor. - Takeshi Koike; Hiroki Sato; Akira Hyogo; Keitaro Sekine (IEICE Trans. Electron., 2007)

Signal-to-noise ratio improvement of common-gate CMOS LNA for Ultra-Wide-Band. - Teppei Hayashi; Hiroki Sato; Akira Hyogo; Keitaro Sekine (APCCAS, 2008)

A 5Gb/s adaptive equalizer using filter switching. - Tsutomu Tomioka; Takahiro Fujita; Kozue Sasaki; Hiroki Sato; Akira Hyogo; Keitaro Sekine (APCCAS, 2008)

Balanced Three-Phase Active-RC Tow-Thomas Biquad Complex Filter for Wireless Communication Systems. - Junya Matsuno; Hiroki Sato; Akira Hyogo; Keitaro Sekine (IEICE Trans. Electron., 2008)

Input-Feedforward Two-Path Band-Pass Delta-Sigma Modulator Based on Horizontal or Vertical Opamp Sharing Technique. - Naoya Waki; Hiroki Sato; Akira Hyogo; Keitaro Sekine (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

A Signal Detection Circuit for 8b/10b 2.5 Gb/s Serial Data Communication System in 90 nm CMOS. - Kozue Sasaki; Hiroki Sato; Akira Hyogo; Keitaro Sekine (IEICE Trans. Electron., 2010)