Wave transmission lines and networks – Coupling networks – Equalizers
Patent
1985-01-29
1986-12-30
Gensler, Paul
Wave transmission lines and networks
Coupling networks
Equalizers
330295, 330304, 360 65, H03H 1106
Patent
active
046332006
ABSTRACT:
A voltage controlled equalizer has two parallel signal paths. A first signal path is provided by a delay line coupled to an input of an amplifier. A control circuit is coupled between an input of the delay line and an output of the amplifier, via a second, parallel signal path. A control signal is applied to the control circuit to adjust the gain of the second signal path, thereby adjusting an amplitude versus frequency response characteristic of the equalizer. Signal delays caused by the control circuit are preferably selected substantially equal to those of the amplifier to compensate for undesired phase shifts of high frequency signals in the second signal path.
REFERENCES:
patent: 2920281 (1960-01-01), Appert et al.
patent: 4479152 (1984-10-01), Chi
Ampex Corporation
Gensler Paul
Strnad Elizabeth E.
Talcott Joel D.
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