Synchronization of asynchronous data signals

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United States of America Patent

PATENT NO 4811340
SERIAL NO

06876134

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a synchronous network, asynchronous data signals are synchronized using positive/negative stuffing under the control of stuff request signals which are produced in dependence upon the phase difference between the asynchronous and synchronized data signals as compared to respective threshold values. The phase difference is, or the threshold values are, cyclically changed in a manner to produce additional stuffing, not necessitated by the asynchronous frequency difference, whereby the frequency of jitter, due to stuffing, in the synchronized data signal is increased. The increased frequency jitter is filtered out in an already-provided phase locked loop.

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Patent Owner(s)

  • NORTEL NETWORKS LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Grover, Wayne D Edmonton, CA 40 1563
McEachern, James A Edmonton, CA 4 305

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