Television tuner circuit

Details Television tuner circuit Television tuner circuit

1975-03-17

1977-05-24

Safourek, Benedict V.

Tuners

Tuner unit with electromagnetic operator

Predetermined center frequency selector

325459, 325465, 334 56, H04B 106

Patent

active

040258572

ABSTRACT:
In a VHF-UHF tuner, the signal from the VHF antenna is fed to a resonant circuit comprising a plurality of coils which are selectably shorted out by a channel selection switch to select the various channels. The output of the resonant circuit and the UHF IF signal are fed to a band switch integral with the channel selection switch. The channel selection switch is adapted to short out the coils of the resonant circuit when in the UHF position to attenuate the VHF channel 2 signal component and prevent interference thereof with the UHF IF signal and the production of a beat frequency signal.

REFERENCES:
patent: 2530329 (1950-11-01), Fyler
patent: 2806945 (1957-09-01), Wingert
patent: 2841655 (1958-07-01), Horowitz
patent: 2843683 (1958-07-01), Lewis

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