Tuning system for a multi-band television receiver

Details Tuning system for a multi-band television receiver Tuning system for a multi-band television receiver

H - Electricity

04

N

365/5

H04N 5/50 (2006.01) H03J 5/24 (2006.01)

Patent

CA 1193032

A B S T R A C T 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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