A transduction-based framework to synthesize RSFQ circuits. - Shigeru Yamashita; Katsunori Tanaka; Hideyuki Takada; Koji Obata; Kazuyoshi Takagi (ASP-DAC, 2006)

Logic Synthesis Method for Dual-Rail RSFQ Digital Circuits Using Root-Shared Binary Decision Diagrams. - Koji Obata; Kazuyoshi Takagi; Naofumi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

A Method of Sequential Circuit Synthesis Using One-Hot Encoding for Single-Flux-Quantum Digital Circuits. - Koji Obata; Kazuyoshi Takagi; Naofumi Takagi (IEICE Trans. Electron., 2007)

A Clock Scheduling Algorithm for High-Throughput RSFQ Digital Circuits. - Koji Obata; Kazuyoshi Takagi; Naofumi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Design methods for pipeline & delta-sigma A-to-D converters with convex optimization. - Kazuo Matsukawa; Takashi Morie; Yusuke Tokunaga; Shiro Sakiyama; Yosuke Mitani; Masao Takayama; Takuji Miki; Akinori Matsumoto; Koji Obata; Shiro Dosho (ASP-DAC, 2009)

A 69.8 dB SNDR 3rd-order Continuous Time Delta-Sigma Modulator with an Ultimate Low Power Tuning System for a Worldwide Digital TV-Receiver. - Kazuo Matsukawa; Yosuke Mitani; Masao Takayama; Koji Obata; Yusuke Tokunaga; Shiro Sakiyama; Shiro Dosho (CICC, 2010)

Automated Passive-Transmission-Line Routing Tool for Single-Flux-Quantum Circuits Based on A* Algorithm. - Masamitsu Tanaka; Koji Obata; Yuki Ito; Shota Takeshima; Motoki Sato; Kazuyoshi Takagi; Naofumi Takagi; Hiroyuki Akaike; Akira Fujimaki (IEICE Trans. Electron., 2010)

A Fifth-Order Continuous-Time Delta-Sigma Modulator With Single-Opamp Resonator. - Kazuo Matsukawa; Yosuke Mitani; Masao Takayama; Koji Obata; Shiro Dosho; Akira Matsuzawa (IEEE J. Solid State Circuits, 2010)

A 10 MHz BW 50 fJ/conv. continuous time ΔΣ modulator with high-order single opamp integrator using optimization-based design method. - Kazuo Matsukawa; Koji Obata; Yosuke Mitani; Shiro Dosho (VLSIC, 2012)

A Low Distortion 3rd-Order Continuous-Time Delta-Sigma Modulator for a Worldwide Digital TV-Receiver. - Koji Obata; Kazuo Matsukawa; Yosuke Mitani; Masao Takayama; Yusuke Tokunaga; Shiro Sakiyama; Shiro Dosho (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

A 71dB-SNDR 50MS/s 4.2mW CMOS SAR ADC by SNR enhancement techniques utilizing noise. - Takashi Morie; Takuji Miki; Kazuo Matsukawa; Yoji Bando; Takeshi Okumoto; Koji Obata; Shiro Sakiyama; Shiro Dosho (ISSCC, 2013)

30.2 Digital PWM-driven AMOLED display on flex reducing static power consumption. - Jan Genoe; Koji Obata; Marc Ameys; Kris Myny; Tung Huei Ke; Manoj Nag; Soeren Steudel; Sarah Schols; Joris Maas; Ashutosh Tripathi; Jan-Laurens P. J. van der Steen; Tim J. Ellis; et al. (ISSCC, 2014)

30.1 8b Thin-film microprocessor using a hybrid oxide-organic complementary technology with inkjet-printed P2ROM memory. - Kris Myny; Steve Smout; Maarten Rockele; Ajay Bhoolokam; Tung Huei Ke; Soeren Steudel; Koji Obata; B. M. Marín-Santibáñez; Duy-Vu Pham; Arne Hoppe; Aashini Gulati; F. Rodríguez González; et al. (ISSCC, 2014)

Integrated Line Driver for Digital Pulse-Width Modulation Driven AMOLED Displays on Flex. - Jan Genoe; Koji Obata; Marc Ameys; Kris Myny; Tung Huei Ke; Manoj Nag; Soeren Steudel; Sarah Schols; Joris Maas; Ashutosh Tripathi; Jan-Laurens P. J. van der Steen; Tim Ellis; et al. (IEEE J. Solid State Circuits, 2015)

A 4.2 mW 50 MS/s 13 bit CMOS SAR ADC With SNR and SFDR Enhancement Techniques. - Takuji Miki; Takashi Morie; Kazuo Matsukawa; Yoji Bando; Takeshi Okumoto; Koji Obata; Shiro Sakiyama; Shiro Dosho (IEEE J. Solid State Circuits, 2015)

A 97.99 dB SNDR, 2 kHz BW, 37.1 µW noise-shaping SAR ADC with dynamic element matching and modulation dither effect. - Koji Obata; Kazuo Matsukawa; Takuji Miki; Yusuke Tsukamoto; Koji Sushihara (VLSI Circuits, 2016)