Adaptive level control for electro-acousto device

Details Adaptive level control for electro-acousto device Adaptive level control for electro-acousto device

1976-11-04

1978-03-14

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including gain control means

179 1VL, 330 51, 330 59, 330141, 330145, 330207R, H03G 330

Patent

active

040793354

ABSTRACT:
A circuit for providing adaptive level control in a sound-recording device. A feed-back signal drives a variable attenuator which controls the input level to the audio amplifier stage. Means are provided for preventing voltage spikes at turn-on from adversely affecting the operation of the attenuator and which provide stable sensitivity control.

REFERENCES:
patent: 3790896 (1974-02-01), Shimizu et al.
patent: 3992677 (1976-11-01), Tsurushima

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