Design of an analog front-end for ambulatory biopotential measurement systems  

作　　者：王佳桢 许俊 郑立荣 任俊彦 

机构地区：[1]State Key Laboratory of ASIC & System,Fudan University [2]School of Information and Communication Technology

出　　处：《Journal of Semiconductors》2010年第10期92-98,共7页半导体学报（英文版）

基　　金：Project supported by the National High Technology Research and Development Program of China(No.2008AA010702)

摘　　要：A continuously tunable gain and bandwidth analog front-end for ambulatory biopotential measurement systems is presented. The front-end circuit is capable of amplifying and conditioning different biosignals. To optimize the power consumption and simplify the system architecture, the front-end only adopts two-stage amplifiers. In addition, careful design eliminates the need for chopping circuits. The input-referred noise of the system is only 1.19 μVrms （0.48-2000 Hz）. The chip is fabricated via a SMIC 0.18μm CMOS process. Although the power consumption is only 32.1 μW under a 3 V voltage supply, test results show that the chip can successfully extract biopotential signals.A continuously tunable gain and bandwidth analog front-end for ambulatory biopotential measurement systems is presented. The front-end circuit is capable of amplifying and conditioning different biosignals. To optimize the power consumption and simplify the system architecture, the front-end only adopts two-stage amplifiers. In addition, careful design eliminates the need for chopping circuits. The input-referred noise of the system is only 1.19 μVrms （0.48-2000 Hz）. The chip is fabricated via a SMIC 0.18μm CMOS process. Although the power consumption is only 32.1 μW under a 3 V voltage supply, test results show that the chip can successfully extract biopotential signals.

关 键 词：analog front-end biopotential measurement system LOW-POWER LOW-NOISE 

分 类 号：TM933.23[电气工程—电力电子与电力传动]