MINIATURE ULTRA-LOW-POWER BIOPOTENTIAL AMPLIFIER FOR POTABLE APPLICATIONS
Resource
Biomedical Engineering: Application, Basis & Communication 17 (2): 108-110
Journal
Biomedical Engineering: Application
Journal Issue
2
Pages
-
Date Issued
2005
Date
2005
Author(s)
CHIEN, CHIA-NAN
Abstract
A high input impedance, high common mode rejection ratio, fixed gain (×100) amplifier is proposed for recording biopotential signals. This miniature amplifier affords the feature of power saving. It can continuously function for as long as 3 months with a small battery (3.3 V, 2.2 g). A practical application of this amplifier for ECG recording has shown that it has great potential for recording other biomedical signals. Hence, this amplifier can be used as a building block at the front end of most biomedical systems. Detailed design considerations and circuit implementation of this amplifier are described to facilitate its acceptance as a common module for this purpose.
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