Toshihisa Watabe

2021年10月にNHKを退職し、2021年11月より華為技術日本株式会社　東京研究所において、スマートフォン向けのCMOSイメージセンサに搭載する低消費電力ADCの研究開発に従事。

1991-2012, 2015-present Japan Broadcasting Corporation (NHK), Tokyo, Japan ・ Science and Technology Research Laboratories, Advanced Functional Devices Division（1994-2012, 2015- present） ・ Principal Research Engineer（2004-2012, 2015- present） ・ Research Engineer（1994-2004） - Research on 8K 120fps full-spec Super Hi-Vision CMOS image sensor. Responsible for designing 12-bit 2-stage cyclic ADC with low power consumption, and evaluating characteristics of the sensor. - Research on stacked 8K CMOS image sensor overlaid with highly sensitive multiplication photoconversion layer. Responsible for reducing noise generated in CMOS sensor, designing evaluation circuit board for the sensor, and evaluating characteristics of the sensor. - Research on highly sensitive CMOS image sensor overlaid with HARP film. Responsible for designing analog readout circuit to read signal charges generated in HARP film, and evaluating characteristics of the test sensor. - Research on three-layer stacked color image sensor overlaid with organic photoconductive films. Directed research on design 3-transistor APS type TFT Pixel circuit 2012- 2015 NHK Engineering System, Inc. Tokyo, Japan ・ Advanced Development Division ・ Chief Engineer - Research on digital calibration for 2-stage cyclic ADC used in Super Hi-Vision CMOS image sensor. Proposed precise and high-speed digital calibration algorithm to compensate for errors generated in ADC, and demonstrated its effectiveness by using test circuit.