Producción CyT
Artículo
Autoría
SPINELLI, ENRIQUE MARIO
;
N. Martinez
;
M. Mayosky
Fecha
2001
Editorial y Lugar de Edición
Elsevier
Revista
MEDICAL ENGINEERING & PHYSICS,
vol. 23
(pp. 235-238)
Elsevier
Resumen
Información suministrada por el agente en
SIGEVA
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 inverte...
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.
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