Television tuner circuit

Details Television tuner circuit Television tuner circuit

1979-05-24

1982-04-20

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455176, 455180, H04N 544, H04B 116

Patent

active

043262953

ABSTRACT:
A television tuner comprises a VHF tuner section and a UHF tuner section and is configured in the two tuned modes of VHF high band and VHF low band between which the input tuning circuit of the VHF tuner section is switched by a diode in response to a source voltage. The television tuner further comprises a bias circuit for biasing said band-switching diode in reverse or forward direction by use of the UHF band source voltage during the receipt of UHF band.

REFERENCES:
patent: 3564423 (1971-02-01), Putzer
patent: 3678421 (1972-07-01), Ono
patent: 3727140 (1973-04-01), Rodrigalvarex Nieto
patent: 4000470 (1976-12-01), Okada
patent: 4118679 (1978-10-01), Hiday et al.

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