Amplifier circuit for electret condenser microphone

Details Amplifier circuit for electret condenser microphone Amplifier circuit for electret condenser microphone

1995-01-13

1996-11-19

Isen, Forester W.

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

With electrostatic microphone

381120, 381122, 379395, H04R 300

Patent

active

055771297

ABSTRACT:
An amplifier circuit for an electret condenser microphone includes an operational amplifier, an operational amplifier, a bias circuit, and a power supply circuit. The operational amplifier has an inverting input terminal for receiving an output of a two-wire lead electret condenser microphone and a noninverting input terminal for receiving a bias voltage. The bias circuit divides a power supply voltage to generate the bias voltage. The power supply circuit applies the power supply voltage to the electret condenser microphone through the bias circuit and a first resistor.

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Tremaine, Audio Cyclopedia, 1980, pp. 549 & 607.
Langford-Smith (ed.), Radiotron Designer's Handbook, 1968, pp. 535-539.
Tremaine, Audio Cyclopedia, 1980, pp. 549-607.

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