Title: Digital tuning device

Abstract: A digital tuning device for accurate selectable tuning of a resonant circuit. The inductive and capacitive elements of the resonant circuit are connected by a transformer device whose turns ratio is variable in accurate digital increments. Since the reflected reactance is related to the square of the turns ratio and since the resonant frequency varies as the inverse square root of the reactance, the resonant frequency of the circuit is directly related to the turns ratio.

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Inventors: Ryan, Paul A. (Columbus, OH, US)

Application Number: 494245
Filing Date: 1974-08-02
Publication_date: 1976-03-09
Assignee:
Primary Class(es): 334/59 331/179, 331/181, 334/56, 336/150
Other Classes:
US Patent Ref:

2806953

Sep, 1957

Krauss

331/179.

Other Refs:
Primary Examiner: Grimm, Siegfried H.
Assistant Examiner:
Attorney: Pollock, Vande Sande & Priddy