Frequency synthesizer with rapidly changeable frequency

Details Frequency synthesizer with rapidly changeable frequency Frequency synthesizer with rapidly changeable frequency

1977-04-18

1978-08-08

Kominski, John

Oscillators

Automatic frequency stabilization using a phase or frequency...

With intermittent comparison controls

331 16, 331179, H03B 304

Patent

active

041059484

ABSTRACT:
A frequency synthesizer capable of rapidly changing to a different desired output frequency includes a voltage-controlled oscillator and a variable frequency divider arranged in a phase-locked loop. A first frequency-control voltage is initially applied to the voltage-controlled oscillator to cause a rapid change in its output frequency toward a desired value. Then, the divisor of the variable frequency divider is changed to produce a second frequency-control voltage which precisely sets and maintains the oscillator output frequency at the desired value.

REFERENCES:
patent: 3286191 (1966-11-01), Cornwell
patent: 3568083 (1971-03-01), Harzer
patent: 3579281 (1971-05-01), Kam
patent: 3651422 (1972-03-01), Underhill
patent: 3676794 (1972-07-01), Bidell et al.
patent: 3965438 (1976-06-01), Winston
patent: 4030045 (1977-06-01), Clark
D. J. Malone, "Gear-Shifted Phase-Locked Osc." IBM Tech. Disc. Bul. vol. 14, No. 9, Feb. 1972.

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