Patent ID: 9743203
Date: 2017-08-22
CPC Classifications: B81B,B81C,G01R,H01L,H04R

Claim:
1. A method of detecting defects in a high impedance network of a MEMs microphone sensor interface circuit, the method comprising: adding a high-voltage reset switch to a high-voltage high impedance network; closing the high-voltage reset switch during a start-up phase of the MEMs microphone sensor interface circuit; closing a low-voltage reset switch of a low-voltage high impedance network during the start-up phase; simultaneously opening the high-voltage reset switch and the low-voltage reset switch at the end of the start-up phase; and detecting a defect in the high-voltage high impedance network or the low-voltage high impedance network immediately after opening the high-voltage reset switch and the low-voltage reset switch.