Digital tuning device

Details Digital tuning device Digital tuning device

1974-08-02

1976-03-09

Grimm, Siegfried H.

Tuners

With switching means

Tuned transformer circuit substituted by switching

331179, 331181, 334 56, 336150, H03J 502

Patent

active

039434710

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.

REFERENCES:
patent: 2806953 (1957-09-01), Krauss

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