Electret microphone circuit

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8588433
APP PUB NO 20110228954A1
SERIAL NO

12726237

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Abstract

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There is disclosed a microphone, a circuit, and a method. A microphone capsule may include an electret microphone and a field effect transistor (FET). A floating DC voltage source may have a first end connected to a drain terminal of the electret microphone capsule and a second end. A load resistor may be connected between the second end of the floating DC voltage source and a source terminal of the electret microphone capsule. A voltage follower may have an output connected to the source terminal of the electret microphone capsule and the first end of the floating DC voltage source. A coupling capacitor may couple an audio signal from the source terminal of the electret microphone capsule to an input of the voltage follower.

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Patent Owner(s)

  • BALTIC LATVIAN UNIVERSAL ELECTRONICS, LLC

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Saulespurens, Martins Westlake Village, US 11 95
Stanevics, Felikss Riga, LV 1 7

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