Phase locked state detecting apparatus and image processing...

Details Phase locked state detecting apparatus and image processing... Phase locked state detecting apparatus and image processing...

2005-10-18

2005-10-18

Kinkead, Arnold (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

C331S00100A, C331S025000, C331SDIG002, C327S156000, C327S159000, C327S160000

Reexamination Certificate

active

06956441

ABSTRACT:
There is provided a phase locked state detecting apparatus for accurately detecting whether or not a phase locked state is canceled, the phase locked state detecting apparatus includes a comparator17for comparing a phase of a processing clock signal Smc generated by a phase locked loop for use in an information processing with a phase of a reference clock signal Src; an edge counter18for detecting a change of a frequency of the processing clock signal Smc; and a CPU19for judging to based on a phase comparison result whether or not the processing clock signal Smc is in the phase locked state with respect to the reference clock signal Src, and subsequently judging based on a detection result of the frequency change whether or not the phase locked state is canceled.

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patent: 2773925 (1999-07-01), None
patent: WO 99/31806 (1999-06-01), None

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