Frequency synthesizer

Details Frequency synthesizer Frequency synthesizer

1979-04-10

1981-11-17

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

307273, 331 8, 331 25, 331 27, H03L 718

Patent

active

043014224

ABSTRACT:
A first frequency-to-voltage converter develops a first voltage representative of a standard frequency. A variable frequency source is provided to furnish a pulse sequence with constant-duration but variable repetition pulses. A frequency-to-voltage converter receives the pulse sequence to develop a second voltage representative of a total pulse energy generated in the pulse sequence per unit time. The deviation of the second voltage from the first voltage is detected by a comparator to control the variable frequency source to derive a desired frequency.

REFERENCES:
patent: 2963648 (1960-12-01), Baskin et al.
patent: 3130376 (1964-04-01), Ross
patent: 3249886 (1966-05-01), Anderson et al.
patent: 3431509 (1969-03-01), Andrea
patent: 4009449 (1977-02-01), Agans
patent: 4055814 (1977-10-01), Abraham et al.

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