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

页码：235 / 238

页数：4

共 6 条

[1] A micropower dry-electrode ECG preamplifier [J].