Variable equalizer

Details Variable equalizer Variable equalizer

1977-12-13

1980-02-05

Gensler, Paul L.

Wave transmission lines and networks

Coupling networks

Equalizers

330107, 330304, H03H 714

Patent

active

041874790

ABSTRACT:
A variable equalizer is provided which, using a single variable resistor, can make compensations in both the directions of the gain side, and the loss side and can set a reference gain as desired.
An input signal to be equalized is received as an antiphase input signal of a differential amplifier, an output signal which has been equalized is fed back to the antiphase input signal, and a difference signal between an in-phase input signal and the antiphase input signal is delivered as an output. A resistor is connected between an input terminal and ground, first and second impedance circuits and a variable resistor are connected between an intermediate point of the first-mentioned resistor and ground in the order mentioned, and a voltage at the junction point between the first and second impedance circuits is used as the in-phase input signal.

REFERENCES:
patent: 3446996 (1969-05-01), Toffler
patent: 3646464 (1972-02-01), Boggs
patent: 3753140 (1973-08-01), Feistel
patent: 3906390 (1975-09-01), Rollett
patent: 4063187 (1977-12-01), Orchard

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