Method and apparatus for a redundant clock

Details Method and apparatus for a redundant clock Method and apparatus for a redundant clock

2005-01-04

2005-01-04

Chin, Stephen (Department: 2634)

Pulse or digital communications

Synchronizers

C327S099000

Reexamination Certificate

active

06839391

ABSTRACT:
A redundant clock system and communications cards for utilizing the system, the system including a clock source for providing a reference signal for communication cards; an alternate clock source, coupled to the clock source, for providing an alternate reference signal for the communication cards; each of the communication cards including a clock generator, referenced to one of the reference signals for providing clock signals at frequencies corresponding to functions provided by each of the communications cards, and each of the communication cards arranged to couple to a surviving one of the reference signals when a failure of the other is detected.

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