Signal expander

Details Signal expander Signal expander

1978-12-26

1980-09-02

Mullins, James B.

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

330141, 330279, 330281, H03G 700

Patent

active

042209293

ABSTRACT:
An improved signal expansion system and technique is disclosed. The system comprises a detector for sensing an input signal and for producing responsively thereto a D.C. control signal having an amplitude as a function of the input signal, and a gain control amplifier for amplifying the input signal, the amplifier including means for controlling the gain of the amplifier as a function of the amplitude of the control signal. The improvement comprises means for varying the amplitude of the D.C. signal at least in part as a function of the time derivative of that amplitude.

REFERENCES:
patent: 3475688 (1969-10-01), Masonson
patent: 3980964 (1976-09-01), Grodinsky

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