Comparator

Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By phase

Reexamination Certificate

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Details

C327S160000

Reexamination Certificate

active

06967503

ABSTRACT:
A comparator compares a first binary input signal and a second binary input signal each binalized. A generator generates a reset signal at each rising edge or each falling edge of the first input signal. A counter counts the second input signal at each timing determined by the reset signal. The counted value represents a ratio of each frequency of the first input signal and the second input signal. A subtractor calculates a difference between the counted value and a set value representing a predetermined ratio of each frequency of the first input signal and the second input signal. An integrator integrates the difference. The integrated value represents a phase difference of the frequencies of the first input signal and the second input signal.

REFERENCES:
patent: 5486867 (1996-01-01), Hsu et al.
patent: 5563531 (1996-10-01), Meyer
patent: 5835155 (1998-11-01), Jennes et al.
patent: 6169717 (2001-01-01), Kim et al.
patent: 59-58364 (1984-04-01), None
patent: 60-93967 (1985-06-01), None
patent: 63-46073 (1988-02-01), None
patent: 5-300014 (1993-11-01), None

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