Pull-in range expanding circuit for digital automatic fine...

Details Pull-in range expanding circuit for digital automatic fine... Pull-in range expanding circuit for digital automatic fine...

H - Electricity

04

N

365/4

H04N 5/50 (2006.01)

Patent

CA 1213383

ABSTRACT OF THE DISCLOSURE The present invention provides a pull-in range ex- panding circuit of a digital automatic fine tuning in a TV having a voltage tuning system, said pull-in range being ex- panded to include even the offset frequency as cable TV by narrowing the difference of the upper and lower threshold vol- tages when the power source is turned on or while a channel is selected, and the pull-in range then becomes normal when watch- ing TV.

431619

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