A single supply biopotential amplifier

被引：23
|
作者：
Spinelli, EM
Martinez, NH
Mayosky, MA
机构：
[1] Natl Univ La Plata, Dept Electrotecn, LEICI, RA-1900 La Plata, Argentina
[2] CICPBA, RA-1900 La Plata, Argentina
来源：
MEDICAL ENGINEERING & PHYSICS | 2001年 / 23卷 / 03期
关键词：
biopotential amplifiers; single supply; battery powered; common mode range;
D O I：
10.1016/S1350-4533(01)00040-6
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
A biopotential amplifier for single supply operation is presented. It uses a Driven Right Leg Circuit (DRL) to drive the patient's body to a DC common mode voltage, centering biopotential signals with respect to the amplifier's input voltage range. This scheme ensures proper range operation when a single power supply is used. The circuit described is especially suited for low consumption, battery-powered applications. requiring a single battery and avoiding switching voltage inverters to achieve dual supplies. The generic circuit is described and, as an example, a biopotential amplifier with a gain of 60 dB and a DC input range of +/- 200 mV was implemented using low power operational amplifiers. A Common Mode Rejection Ratio (CMRR) of 126 dB at 50 Hz was achieved without trimming. (C) 2001 IPEM. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：235 / 238
页数：4
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