Title: Multiple frequency band receiver tuner system using single, non-bandswitched local oscillator

Abstract: A single, non-bandswitched local oscillator in a UHF, VHF, CATV television receiver tuner system is employed with frequency multiplying and, or frequency dividing to obtain the required IF frequencies. The tuner operates in a double frequency conversion mode at UHF frequency with a tuned VHF RF amplifier dual functioning as a UHF IF amplifier. A UHF preselector and the VHF RF amplifier are gang-tuned with the local oscillator. The tuner operates in a single frequency conversion mode at VHF and CATV frequencies, and one of the local oscillator frequency dividing or doubling stages is utilized to distinguish the VHF low band from the high VHF-CATV tuning band.

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Inventors: Gittinger, Norman C. (Schenectady, NY, US)

Application Number: 428074
Filing Date: 1973-12-26
Publication_date: 1976-01-06
Assignee: General Electric Company (Schenectady, NY)
Primary Class(es): 455/189.1 455/188.2, 455/190.1, 455/191.1, 455/314
Other Classes:
US Patent Ref:

2902598	Sep, 1959	Hills	325/453.
3264566	Aug, 1966	Kaufman et al.	325/465.

Other Refs:
Primary Examiner: Safourek, Benedict V.
Assistant Examiner: Bookbinder, Marc E.
Attorney: Salai; Stephen B., Cohen; Joseph T., Squillaro; Jerome C.