Phaselock circuitry with lock indication

Details Phaselock circuitry with lock indication Phaselock circuitry with lock indication

1975-07-31

1976-09-21

Heyman, John S.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

328155, 324 83D, 331 25, H03B 304

Patent

active

039821900

ABSTRACT:
Phaselock circuitry including phaselock loop means having an input signal and a feedback signal. Two signals S.sub.X and S.sub.Y are provided which are synchronous respectively with the input signal and the feedback signal. A decision circuit provides a lock or no-lock indication based on the degree of concurrence between S.sub.X and S.sub.Y.

REFERENCES:
patent: 3370252 (1968-02-01), Zoerner
patent: 3386096 (1968-05-01), Lundgreen
patent: 3458823 (1969-07-01), Nordahl
patent: 3588710 (1971-06-01), Masters
patent: 3764903 (1973-10-01), Griswold
patent: 3795169 (1974-03-01), Belcher
patent: 3921095 (1975-11-01), Chu

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