A low power low noise analog front end for portable healthcare system  

作　　者：王艳朝 柯可人 秦文辉 秦亚杰 易婷 洪志良 

机构地区：[1]State Key Laboratory of ASIC & Systems,Fudan University

出　　处：《Journal of Semiconductors》2015年第10期135-141,共7页半导体学报（英文版）

基　　金：Project supported by the Science and Technology Commission of Shanghai Municipality(No.13511501100);the State Key Laboratory Project of China(No.11MS002);the State Key Laboratory of ASIC&System,Fudan University

摘　　要：The presented analog front end （AFE） used to process human bio-signals consists of chopping in- strument amplifier （IA）, chopping spikes filter and programmable gain and bandwidth amplifier. The capacitor- coupling input of AFE can reject the DC electrode offset. The power consumption of current-feedback based IA is reduced by adopting capacitor divider in the input and feedback network. Besides, IA＇s input thermal noise is decreased by utilizing complementary CMOS input pairs which can offer higher transconductance. Fabricated in Global Foundry 0.35 μm CMOS technology, the chip consumes 3.96 μA from 3.3 V supply. The measured input noise is 0.85μVrms （0.5-100 Hz） and the achieved noise efficient factor is 6.48.The presented analog front end （AFE） used to process human bio-signals consists of chopping in- strument amplifier （IA）, chopping spikes filter and programmable gain and bandwidth amplifier. The capacitor- coupling input of AFE can reject the DC electrode offset. The power consumption of current-feedback based IA is reduced by adopting capacitor divider in the input and feedback network. Besides, IA＇s input thermal noise is decreased by utilizing complementary CMOS input pairs which can offer higher transconductance. Fabricated in Global Foundry 0.35 μm CMOS technology, the chip consumes 3.96 μA from 3.3 V supply. The measured input noise is 0.85μVrms （0.5-100 Hz） and the achieved noise efficient factor is 6.48.

关 键 词：AFE chopping IA low power consumption low noise NEF 

分 类 号：R197.39[医药卫生—卫生事业管理] TN722[医药卫生—公共卫生与预防医学]