1.
Chinese Medical Equipment Journal
;
(6)1989.
Article
in Chinese
| WPRIM
| ID: wpr-588362
ABSTRACT
This paper designs a heart sound processing analog circuit, in which the amplification circuit, the filter circuit and the lifting of electrical level circuit are involved. It also gives a safety design problem analysis using an electret capacitor microphone to pick-up the heart sound signals. It is proved that the circuit is reliable and effective.