Offset calibration in a multiple membrane microphone

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United States of America Patent

PATENT NO 9560455
APP PUB NO 20160381465A1
SERIAL NO

14752475

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Abstract

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A multi-membrane microphone including an audio processing circuit is disclosed. The membranes are configured to output to a plurality of amplifiers a plurality of sensing signals in response to sound. The amplifiers in turn create amplified signals by amplifying the sensing signals and introduce a plurality of offsets into the amplified signals, respectively. The audio processing circuit includes a controller that sequentially measures the offset for each amplifier a corresponding membrane is inactive and stores the offset. The controller also compensates each amplified signal by the corresponding offset during operation of the multi-membrane microphone.

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Patent Owner(s)

  • STMICROELECTRONICS S.R.L.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Miluzzi, Eugenio Milan, IT 7 53

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