Composite signal detecting apparatus having associated filter

Details Composite signal detecting apparatus having associated filter Composite signal detecting apparatus having associated filter

1995-11-09

1997-07-01

Burgess, Glenton B.

Television

Receiver circuitry

Intercarrier circuits

348736, 348732, 455307, H04N 5445

Patent

active

056443684

ABSTRACT:
A detecting circuit for a composite signal containing a video signal and an audio signal. A filter for attenuating the video and audio signals is provided in a PLL circuit loop disposed in the detecting circuit, thus the video or audio signal component generated in the output of the PLL circuit can be reduced and a beat component is not generated in the output of the detecting circuit.

REFERENCES:
patent: 4107730 (1978-08-01), Jones
patent: 4811096 (1989-03-01), Gakumura
European Search Report, Re: EP 95 40 2698, dated May 17, 1996.
Fernseh Und Kinotechnik, "Neue verlustleistungsarme integrierte Schaltungen fur die ZF-Signalverarbeitung", vol. 42, No. 5, pp. 221-226, May 30, 1988.

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