Voltage controlled high frequency equalization

Details Voltage controlled high frequency equalization Voltage controlled high frequency equalization

1991-04-10

1993-03-16

Pascal, Robert J.

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

330294, 333 28R, H03F 3191

Patent

active

051948273

ABSTRACT:
A method and apparatus for equalizing high frequency video signals is disclosed. A video signal to be equalized is received at an input terminal of a network and an equalized video signal is provided from an output of an operational amplifier to an output terminal of the network. The equalized video signal is fedback to one input of the operational amplifier. The video signal to be equalized is coupled to another input of the operational amplifier and is also coupled to respective ones of a plurality of alterable circuit elements such as varactor diodes, which function to mitigate distortions to the frequency response characteristic of the video signal to be equalized by cancelling the effect thereon by the video signal to be equalized.

REFERENCES:
patent: 4117412 (1978-09-01), Holman, II
patent: 4122417 (1978-10-01), Takasaki et al.
patent: 4291276 (1981-09-01), Ida
patent: 4295161 (1981-10-01), Hettiger
patent: 4433301 (1984-02-01), Lukes
patent: 4633200 (1986-12-01), Adler
patent: 4755771 (1988-07-01), Sakaida et al.

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