Preamplifier with a second-order high-pass filtering characteristic

Authors
Lin, YD Tsai, CD Huang, HH Chiou, DC Wu, CP
Citation
Yd. Lin et al., Preamplifier with a second-order high-pass filtering characteristic, IEEE BIOMED, 46(5), 1999, pp. 609-612
Citations number
14
Categorie Soggetti
Multidisciplinary,"Instrumentation & Measurement
Journal title
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
ISSN journal
00189294 → ACNP
Volume
46
Issue
5
Year of publication
1999
Pages
609 - 612
Database
ISI
SICI code
0018-9294(199905)46:5<609:PWASHF>2.0.ZU;2-U
Abstract
A new preamplifier for suppressing low-frequency interference is presented. The proposed preamplifier, with its front end being implemented by an inst rumentation amplifier, enjoys the following advantages: differential high-p ass filtering, high input impedance, high common-mode rejection ratio and l ow passive sensitivity. This circuit can be realized with commercial operat ional amplifiers with enough phase margin, or fabricated in a chip for prac tical measurement of physiological signals.