Muting circuit for a television receiver

Details Muting circuit for a television receiver Muting circuit for a television receiver

1979-10-10

1981-07-21

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

455174, 455194, H04N 560

Patent

active

042801397

ABSTRACT:
A muting circuit for a television receiver of the type having a tuner which is operative to select a desired channel in accordance with a channel selection operation to produce a channel select signal representing the selected channel, a detector circuit for detecting whether a video signal is present or not, a muting signal generator circuit supplied with an output from the detector circuit and the channel select signal representing the selection of a predetermined channel to produce a muting signal when the predetermined channel is selected but no output is produced by the detector circuit, and a muting circuit coupled to a low frequency signal transmission path in response to the muting signal from the muting signal generator circuit to cut off or attenuate the transmission of a low frequency signal.

REFERENCES:
patent: 3619492 (1971-11-01), Evans
patent: 3707597 (1972-12-01), Lunn
patent: 3825838 (1974-07-01), Mayle
patent: 4047226 (1977-09-01), Hedges
patent: 4121254 (1978-10-01), Morita

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