Variable gain control circuit

Details Variable gain control circuit Variable gain control circuit

1974-03-28

1976-03-09

Olms, Douglas W.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

179 1VL, 307264, 330 29, H04R 500, H03G 330

Patent

active

039432866

ABSTRACT:
A variable gain control circuit comprising a signal transmitting path having an input terminal supplied with an input signal and an output terminal delivering therefrom a gain controlled output signal, a variable impedance device having first, second and third electrodes, said first and second electrodes being connected between the connection point of the input and output terminals and a reference point, respectively, and said third electrode being supplied with a control voltage, a DC biasing means for applying a threshold voltage to the variable impedance device, and means for applying the same DC voltage to the first and second electrodes, whereby an undesirable signal in response to said control voltage is not produced at the output terminal of the signal transmitting path.

REFERENCES:
patent: 3213299 (1965-10-01), Rogers
patent: 3229218 (1966-01-01), Sickles et al.
patent: 3441748 (1969-04-01), Werner
patent: 3798373 (1974-03-01), Bauer
patent: 3836791 (1974-09-01), Galloway

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