Active variable equalizer

Details Active variable equalizer Active variable equalizer

1978-11-13

1980-12-30

Gensler, Paul L.

Wave transmission lines and networks

Coupling networks

Equalizers

307264, 330109, 330126, 330151, 330282, 330284, 330304, H04B 314

Patent

active

042426502

ABSTRACT:
An active variable equalizer is arranged to provide a Bode type variable equalizer characteristic without requiring an inductor. The equalization shape remains unchanged as the amount of equalization is varied. This equalizer uses a tandem arrangement of additive feedforward and negative feedback to achieve the mentioned equalization shape.
A circuit interconnects with input and output terminals for combining input and output signals into an intermediate signal having a magnitude equal to a weighted sum of the input and output signals. A frequency dependent circuit responds to the intermediate signal for producing a frequency dependent signal that is combined with the input signal to generate the output signal.

REFERENCES:
patent: 3559084 (1971-01-01), Wise
patent: 3689752 (1972-09-01), Gilbert
patent: 3870964 (1975-03-01), Mills
patent: 3891937 (1975-06-01), Bockelmann et al.
patent: 3921104 (1975-11-01), Gundry
patent: 3921105 (1975-11-01), Brglez
patent: 3950711 (1976-04-01), Ohkawa
patent: 4004253 (1977-01-01), Takasaki et al.
patent: 4055818 (1977-10-01), Gay

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