ICCCAS 2024 Invited Speaker

Satoshi Komatsu

Tokyo Denki University, Japan

Biography: Satoshi Komatsu received the B.S., M.S., and Ph.D. in Electronic Engineering from the University of Tokyo, Tokyo, Japan, in 1996, 1998 and 2001, respectively. He was an assistant professor and an associate professor in VLSI Design and Education Center (VDEC), The University of Tokyo. In 2014, he joined Tokyo Denki University and he is currently a professor at the university. His current research interests are testing of VLSI systems and system level VLSI design methodologies.
He is a member of Institute of Electrical and Electronics Engineers (IEEE), Institute of Electronics, Information and Communication Engineers of Japan (IEICE), and Information Processing Society of Japan (IPSJ).
Speech Title: A Low Power Multi-Bit Passive △∑ Modulator for Wearable Devices
Abstract: We present a low-power multi-bit passive △∑ modulator for wearable devices. Though delta-sigma modulators that use passive filters can achieve low-power operation, the lower gain of the filters in those modulators causes lower resolution. Some techniques that exploit the combination of passive and active filters and low-gain circuits have been proposed to improve the resolution, which causes significant power dissipation. In this study, we propose a modulator that is composed of a passive filter and a 2-bit Flash ADC with a low-power comparator to overcome the above issues. We implemented the proposed modulator in a 180 nm CMOS technology, which has a bandwidth of 10 kHz for a clock frequency of 1.28MHz. The circuit simulation results show that the proposed circuit achieves a maximum SNDR of 54 dB and a dynamic range of 62 dB with 1.75uW power dissipation.