Title: Oscillator for television tuner

Abstract: An oscillator is described for use in the tuner of a television receiver which is tuned to a selected channel by a variable tuning voltage. The oscillator provides a higher than conventional power output at relatively low channel numbers by virtue of circuitry which changes the oscillator's operating current in response to the tuning voltage reaching a predetermined value. That predetermined value is selected to correspond to a relatively low channel number at which the power output of a conventional oscillator begins to decline.

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Inventors: Moon, Frederick H. (Mt. Prospect, IL)

Application Number: 06/304391
Filing Date: 1981-09-21
Publication_date: 1983-04-19
Assignee: ZENITH RADIO CORP

Primary Class(es): 455/179.100 455/318, 334/15, 331/109, 455/195.100
Other Classes: H03B5/12; H03B1/00; H03B5/08; H04B1/26
US Patent Ref:

3356952	December, 1967	Sev	455/196	Stabilized mixer oscillator for wide band television receiver
3723906	March, 1973	Pedersen	331/109	UHF OSCILLATOR
3813615	May, 1974	Okazaki	455/196	LOCAL OSCILLATOR FOR TELEVISION TUNER HAVING REDUCED OSCILLATION VOLTAGE VARIATION BETWEEN HIGH AND LOW FREQUENCY BANDS
3889210	June, 1975	Matsuura et al.	455/196	Local oscillation circuit for reducing oscillation voltage variations between high and low frequency bands
4160213	July, 1979	Carter	455/180	Mixer injection voltage compensation circuit

Other Refs:
Primary Examiner: Bookbinder, Marc E.
Assistant Examiner:
Attorney: Flynn, Thiel, Boutell & Tanis

Claims: