Alternative sensing circuit for MEMS microphone and sensing...

Details Alternative sensing circuit for MEMS microphone and sensing... Alternative sensing circuit for MEMS microphone and sensing...

2011-08-23

2011-08-23

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

C381S113000, C257S254000

Reexamination Certificate

active

08005242

ABSTRACT:
An alternative sensing circuit for a micro-electro-mechanical system (MEMS) microphone and a sensing method thereof are provided. The sensing circuit reads out output signals of an MEMS electret microphone or an MEMS condenser microphone. In considering different operating requirements of the different MEMS microphones, for example, low power consumption for the MEMS electret condenser microphone or high sensitivity for the MEMS condenser microphone, the manner of using two kinds of MEMS microphone sensing components in one circuit can significantly increase the flexibility of using the MEMS microphone and can be applied to the application or design of a condenser sensing component.

REFERENCES:
patent: 2003/0194100 (2003-10-01), Boor
patent: 2006/0062406 (2006-03-01), Kinoshita
patent: 2007/0160234 (2007-07-01), Deruginsky et al.
patent: 2009/0003629 (2009-01-01), Shajaan et al.

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