RESET CIRCUIT FOR MEMS CAPACITIVE MICROPHONES

摘要

A method of initiating a reset sequence for a MEMS capacitive microphone. The method includes monitoring an output of a microphone and detecting a mute condition in the output of the microphone indicative of a fault condition. The method also includes activating a timing circuit. The timing circuit is configured to indicate when a certain time period since the initiation of the timing circuit has elapsed. Upon expiration of the time period indicated by the timing circuit, a microphone reset sequence is initiated.

主权项

1. A method of initiating a reset sequence, the method comprising:
monitoring an output of a microphone; detecting a mute condition in the output of the microphone, the mute condition being indicative of a fault condition; activating a timing circuit configured to indicate when a time period has elapsed since the timing circuit is initiated; and, initiating a microphone reset sequence upon expiration of the time period indicated by the timing circuit.