Electrically tunable bandpass filter

Details Electrically tunable bandpass filter Electrically tunable bandpass filter

1977-12-05

1979-05-08

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333175, 334 56, H03H 710, H03J 326

Patent

active

041538870

ABSTRACT:
A bandpass filter is described for filtering a television signal. The filter has a passband which may be selectively centered for filtering signals in one of two channels of the television receiver. The television channel at which the filter passband is centered is selectable by applying a voltage to a control terminal. The filter frequency response for each channel selected may be independently controlled and a linear phase response is realized for the selected channel minimizing distortion.

REFERENCES:
patent: 2581159 (1952-01-01), Achenbach
patent: 3903487 (1975-09-01), Maier

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