Frequency synthesizers

Details Frequency synthesizers Frequency synthesizers

1972-07-28

1977-08-23

Kominski, John

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 10, 331 14, 331 16, H03B 304

Patent

active

040443140

ABSTRACT:
A frequency synthesizer in which the frequency of a variable frequency oscillator is controlled by means of a control signal and wherein means are provided for determining whether any frequency variation results from a drift in the frequency of the variable frequency oscillator means being provided for generating and maintaining an additional drift control signal to compensate for such drift. The drift control signal is inhibited from change either when it is detected that the control signal is in excess of that which would result solely from drift or the control signal is representative only of a quantisation error.

REFERENCES:
patent: 3383619 (1968-05-01), Naubereit et al.
patent: 3538450 (1970-11-01), Andrea et al.
patent: 3651422 (1972-03-01), Underhill
patent: 3689849 (1972-09-01), Swanson
patent: 3710274 (1973-01-01), Basse et al.

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