Tuners – Tuner unit with electromagnetic operator – Predetermined center frequency selector
Patent
1974-10-25
1976-05-04
Griffin, Robert L.
Tuners
Tuner unit with electromagnetic operator
Predetermined center frequency selector
325465, 325468, 334 15, H04B 116, H03J 500
Patent
active
039551458
ABSTRACT:
A station selector comprising a first memory for memorizing the first decimal digit of a given channel number in a form of a corresponding binary signal, a second memory for memorizing the second decimal place digit of the channel number in a form of corresponding binary signal, first and second binary-to-decimal converters for converting the contents of the first and second memories into corresponding decimal signals, a matrix circuit for combining the decimal outputs of both the first and second binary-to-decimal converters such that the resultant combination can be taken out from one of the intersections of a matrix corresponding to a given two-digit decimal channel number, and a preset voltage circuit having a plurality of preset channel selection voltage elements adapted to provide respective preset channel selection voltages and selecting one of the voltages for selecting a channel of a corresponding channel number in response to the output taken out from the afore-said intersection, the selected voltage being coupled to a variable reactance element in an electronic tuner section. With this system it is possible to readily preset desired channels.
REFERENCES:
patent: 3737818 (1973-06-01), Jacob
patent: 3748645 (1973-07-01), Kawashima
patent: 3766407 (1973-10-01), Hegendorfer
patent: 3778736 (1973-12-01), Sakamoto
patent: 3810022 (1974-05-01), Collins
patent: 3845393 (1974-10-01), Basset
Bookbinder Marc E.
Griffin Robert L.
Matsushita Electric Industrial Company Ltd.
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