Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1983-06-28
1985-02-12
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455189, 455190, 455315, H04B 126
Patent
active
044996020
ABSTRACT:
In a double conversion tuner intended to tune UHF broadcast channels as well as VHF broadcast and cable channels, the frequency range of the first intermediate signal produced by the first mixer is selected to correspond to that of UHF channel 37. The frequency range of UHF channel 37 is reserved for radio astronomy and is, therefore, not used for the broadcast of television information. The tuner includes provisions for inhibiting interference from the RF signals corresponding to channels 36 and 38 which are adjacent to channel 37 and which are used for the broadcast of television information.
REFERENCES:
patent: 3555430 (1971-01-01), Fischer et al.
patent: 3696302 (1972-10-01), Gossard
patent: 3939429 (1976-02-01), Lohn et al.
patent: 4214212 (1980-07-01), Dipietromaria
patent: 4322856 (1982-03-01), Ohta et al.
patent: 4340975 (1982-07-01), Onishi et al.
patent: 4352209 (1982-09-01), Ma
patent: 4353132 (1982-10-01), Saitoh et al.
patent: 4402089 (1983-08-01), Knight et al.
patent: 4408348 (1983-10-01), Theriault
Performance Spec. for: 54 Channel CATV Converter RF Module Stancomp, Inc.--Jun. 1980.
"Past, Present and Future Trends of TV Tuner Design in Europe", IEEE Trans. on Consumer Electronics, J. Schuermann, May 1977.
Hermeling, Jr. Gilbert C.
Muterspaugh Max W.
Emanuel Peter M.
Ng Jin F.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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