Microphone on a specialized microcircuit. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Microphone on a specialized microcircuit. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Audio equipment

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The circuit used an electret microphone type MKE-333.

Microphone on a specialized chip

The signal from the M1 microphone is fed to the input of the K1UN237 type DA1 microcircuit, which is a low-frequency amplifier. The amplifier is included according to the standard scheme. Transistors VT1 of type KT315 and VT2 of type KT361 are connected according to the emitter follower circuit and serve to amplify the current signal. A telephone type TM-2A is used as a load.

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