1.
IEEE Trans Biomed Eng
; 46(5): 609-12, 1999 May.
Article
in English
| MEDLINE
| ID: mdl-10230140
ABSTRACT
A new preamplifier for suppressing low-frequency interference is presented. The proposed preamplifier, with its front end being implemented by an instrumentation amplifier, enjoys the following advantages: differential high-pass filtering, high input impedance, high common--mode rejection ratio and low passive sensitivity. This circuit can be realized with commercial operational amplifiers with enough phase margin, or fabricated in a chip for practical measurement of physiological signals.