Pulse wave phase and frequency detector

Details Pulse wave phase and frequency detector Pulse wave phase and frequency detector

1977-09-16

1978-08-08

Kominski, John

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

307232, 328134, H03B 304

Patent

active

041059476

ABSTRACT:
A phase and frequency detector includes a first flip-flop triggered by a pulse wave from a reference source, and a second flip-flop triggered by a pulse wave from a voltage-controlled oscillator. Gate means couple outputs of the flip-flops back to reset inputs of the flip-flops so that one of the flip-flops generates pulses having widths proportional to the phase difference of the first and second pulse waves. The gate means inhibits the resetting of the triggered flip-flop when the pulses of the first and second pulse waves do not overlap, so that the triggered flip-flop then generates a continuous output useful for rapidly correcting the frequency of the voltage-controlled oscillator.

REFERENCES:
patent: 3350658 (1967-10-01), Walker
patent: 3808407 (1974-04-01), Ratz
patent: 3989931 (1976-11-01), Philips

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