Voltage supply circuit and microphone unit

Details Voltage supply circuit and microphone unit Voltage supply circuit and microphone unit

2011-01-04

2011-01-04

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

With electrostatic microphone

C381S111000, C381S122000, C330S250000

Reexamination Certificate

active

07864970

ABSTRACT:
A voltage supply circuit includes a booster outputting a voltage boosted from a power supply voltage and an amplifier operating with a voltage output from the booster as a power supply and supplying a bias voltage to a sensor. An output voltage value of the booster that generates a power supply voltage of the amplifier is set according to a signal for specifying a sensitivity of the sensor.

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patent: 64-4720 (1989-01-01), None
Koubakutosho Ltd. “PA Audio-Communication System,” 1996.

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