Circuit for the generation of a control variable for the control

Details Circuit for the generation of a control variable for the control Circuit for the generation of a control variable for the control

1979-10-01

1981-07-14

Smith, Alfred E.

Amplifiers

With semiconductor amplifying device

Including gain control means

330282, 333 14, H03G 300, H03H 724, H03B 164

Patent

active

042789451

ABSTRACT:
In a circuit for automatic dynamic compression or expansion the control voltage generator generates a control voltage which is linear against the logarithm of the input amplitude. This characteristic is achieved by a transfer member consisting of several transistors which are subject to different reference voltages and the series resistances of which are staggered.

REFERENCES:
patent: 3969680 (1976-07-01), Wermuth
patent: 3986049 (1976-10-01), Campbell et al.
patent: 4168472 (1979-09-01), Sugimoto

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