Channel selector employing variable capacitance elements for tun

Details Channel selector employing variable capacitance elements for tun Channel selector employing variable capacitance elements for tun

1974-03-11

1977-09-06

Griffin, Robert L.

Tuners

Tuner unit with electromagnetic operator

Predetermined center frequency selector

325465, 334 15, 358191, 358192, H04B 116

Patent

active

040471128

ABSTRACT:
This invention relates to a channel selector provided with a tuning circuit using variable capacitance elements as tuning elements, and has for its primary object the provision of such a channel selector in which bias voltages applied to the variable capacitance elements are preset so that one of these preset bias voltages may be selected by a binary memory circuit and a diode matrix circuit, the selection of the preset voltages disposed in a predetermined sequence may be effected in any desired direction, and one of the bias voltages corresponding to a desired channel may be automatically selected.

REFERENCES:
patent: 3079462 (1963-02-01), Rosenthal
patent: 3287494 (1966-11-01), Spies et al.
patent: 3443230 (1969-05-01), Pratt
patent: 3503018 (1970-03-01), Cavanagh
patent: 3571720 (1971-03-01), Heagney
patent: 3573734 (1971-04-01), Williams et al.
patent: 3602822 (1971-08-01), Evans et al.
Pulse, Digital & Switching Waveforms - Millman & Taub, 1965 pp. 349-352.

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