Band-pass filter system

Details Band-pass filter system Band-pass filter system

1995-10-06

1997-02-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

327552, 327557, 327103, 327148, 327157, 330109, 333174, H03K 500, H03H 712

Patent

active

056062800

ABSTRACT:
A band-pass filter system comprises a band-pass filter, and a frequency band controller for controlling a frequency band of the band-pass filter by generating a corresponding up pulse voltage and a down pulse voltage according to a pre-controlled center frequency obtained from an output frequency of the band-pass filter to produce a control frequency for obtaining a desired center frequency of the band-pass filter.

REFERENCES:
patent: 3644847 (1972-02-01), Neuman
patent: 4162461 (1979-07-01), Wallis et al.
patent: 4302738 (1981-11-01), Cabot et al.
patent: 4663583 (1987-05-01), Ludwick et al.

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