Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1977-07-29
1983-10-04
Chin, Tommy P.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455333, H04B 116
Patent
active
044083475
ABSTRACT:
A high-frequency channel selector for a television receiver including at least one fixed filter having a predetermined passband, and a high-frequency mixer. The antenna for the television receiver receives radiated electromagnetic signals including, for example, a plurality of television channels. The fixed filter has an input coupled to the antenna and filters one fixed frequency spectrum of television channels from the received signals. The mixer has inputs coupled to simultaneously receive the fixed frequency spectrum of channels and mixing signals of a high selectable frequency. The high selectable frequency shifts selectable channels of the spectrum to high intermediate frequency substantially greater than 45 MHz.
REFERENCES:
patent: 2280521 (1942-04-01), Foster
patent: 3617899 (1971-11-01), Goncharoff
patent: 3639840 (1972-02-01), Sheket et al.
patent: 3696302 (1972-10-01), Gossard
patent: 3894286 (1975-07-01), Armstrong
patent: 3942120 (1976-03-01), Ham
patent: 4162451 (1979-07-01), Ash
Television Engineering Handbook, Donald G. Fink, McGraw-Hill Book Company, Inc. 1957, pp. 15-3 to 15-12.
Chin Tommy P.
Comfort James T.
Sharp Melvin
Texas Instruments Incorporated
Tyson Thomas E.
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