1. Institute of Microelectronics,Tsinghua University,Beijing 100084,China 2. Department of Electronic Engineering,Tsinghua University,Beijing 100084,China
Abstract:
A power efficient 8-bit successive approximation register(SAR)A/D for the vital sign monitoring of a wireless body sensor network(WBSN)is presented.A charge redistribution architecture is employed.The prototype A/D is fabricated in 0.18 μm CMOS.The A/D achieves 7.SENOB with sampling rate varying from 64 kHz to 1.5 MHz.The power consumption varies from 10.8 to 225.7 μW.