Variable equalizer

Details Variable equalizer Variable equalizer

1978-04-03

1980-05-20

Gensler, Paul L.

Wave transmission lines and networks

Coupling networks

Equalizers

330109, 330151, 330294, 330304, H03H 714

Patent

active

042041767

ABSTRACT:
A variable equalizer whose frequency characteristic varies in a range of 1-1/Y(f).sup.2
when the gain x of a variable amplifier varies from 0 (zero) to .infin. (infinity), and which reduces the number of shaping networks for the variable frequency characteristic.
It is constructed of a forward pass circuit which consists of a variable amplifier and a frequency-dependent first circuit connected in the order mentioned between input and output terminals, a feedback pass circuit which is dependent upon the frequency and which feeds-back an output of the variable amplifier to an input thereof, and a feed forward pass circuit which is independent of the frequency and which feeds forward part of the input of the variable amplifier to an output of the first circuit.

REFERENCES:
patent: 2981892 (1961-04-01), Franks et al.
patent: 3743957 (1973-07-01), Feistel
patent: 3939437 (1976-02-01), Adam

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