Filter circuit for an electret microphone

Details Filter circuit for an electret microphone Filter circuit for an electret microphone

2007-12-14

2011-12-27

Lee, Calvin (Department: 2892)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

C257S533000

Reexamination Certificate

active

08085956

ABSTRACT:
A miniature electret microphone includes an input buffer circuit. The input buffer circuit includes an integrated circuit including a floating ground substrate and a p-n junction. The p-n junction is coupled as a capacitor to a filter circuit of the input buffer circuit.

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patent: 6532293 (2003-03-01), Collins
patent: WO-01/60117 (2001-08-01), None
International Search Report for Application No. PCT/US08/054466 dated Jul. 9, 2008.

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