Frequency control system that stabilizes an output through...

Details Frequency control system that stabilizes an output through... Frequency control system that stabilizes an output through...

2006-03-02

2009-12-01

Connolly, Mark (Department: 2115)

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

C713S501000, C713S502000, C713S503000, C327S151000, C327S156000

Reissue Patent

active

RE041031

ABSTRACT:
A frequency control system includes a voltage-controlled oscillator, a sampling circuit for sampling a clock signal produced by the oscillator for two consecutive transitions of an unstable incoming digital signal, and a frequency comparator for incrementing and decrementing a transition upcounter-downcounter controlling the oscillator. The system tolerates variation of the frequency of the incoming signal about a mean value, which has no effect on a clock signal to be extracted by means of a phase comparator or on the synthesized clock signal supplied by the oscillator if the incoming signal contains a high level of jitter and is supplied by a programmable frequency divider.

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