Clock supply apparatus indicating and transmitting preciseness o

Details Clock supply apparatus indicating and transmitting preciseness o Clock supply apparatus indicating and transmitting preciseness o

1996-12-20

1997-11-18

Tse, Young T.

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375226, 370516, 331 49, H04L 700, H04J 306

Patent

active

056895364

ABSTRACT:
A clock supply apparatus contains: a clock generating unit for generating a clock signal; a phase comparing unit for inputting a reference clock signal, and obtaining a phase difference between the reference clock signal and the clock signal generated by the clock generating unit; a frequency control unit for generating a control signal for controlling the frequency of the clock signal generated by the clock generating unit, based on the phase difference; a clock preciseness monitoring unit for monitoring preciseness of the clock signal, based on the phase difference; and a clock preciseness output unit for outputting information indicating the preciseness of the clock signal, based on the phase difference.

REFERENCES:
patent: 4972442 (1990-11-01), Steierman
patent: 5184350 (1993-02-01), Dara
patent: 5257293 (1993-10-01), Tagucri
R. Metz, et al., "Network Clock Synchronization", The Bell System Technical Journal, vol. 60, No. 6, Jul.-Aug. 1981, pp. 1109-1129.

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