Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1982-03-30
1983-11-29
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455189, 455191, 455197, 455340, H04B 126
Patent
active
044184280
ABSTRACT:
A television tuning system includes UHF and VHF signal paths each tuned by a tuning voltage and coupled to a common signal path by a diplexer. So that UHF signals will be attenuated so to not cause interferences with a VHF channel signal which is selected to be viewed, the UHF filter is detuned when a VHF channel is selected. Detuning the UHF filter is accomplished by modifying the tuning voltage for the UHF filter responsive to the VHF band-switching voltage.
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Berard, Jr. C. A.
Ng Jin F.
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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