Circuit arrangement for adjusting the volume of an automobile ra

Details Circuit arrangement for adjusting the volume of an automobile ra Circuit arrangement for adjusting the volume of an automobile ra

1978-01-24

1979-12-18

Dahl, Lawrence J.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

325406, 330141, 330281, H03F 126

Patent

active

041796675

ABSTRACT:
The invention relates to a circuit arrangement for adjusting the volume of an automobile radio receiver in dependence on road noise, comprising a microphone which picks up the noise and emits an electric signal which is conducted by way of an amplifier, a rectifier and a time-controlled circuit, to a control-adjustment member contained in the low frequency channel of the receiver.

REFERENCES:
patent: 2409058 (1946-10-01), Mitchell
patent: 2501327 (1950-03-01), Good
patent: 3021489 (1962-02-01), Nielsen

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