Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Reexamination Certificate
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.
Chou Wen-Chieh
Hsu Yu-Chun
Industrial Technology Research Institute
Jianq Chyun IP Office
Lao Lun-See
Mei Xu
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