Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Patent
1996-02-21
1999-11-09
Tse, Young T.
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
375373, 370516, 331 11, H04L 700
Patent
active
059828315
ABSTRACT:
A feed forward apparatus and method discipline a clock signal by a reference signal in digital telecommunication networks. A synthesizer correction term within the feed forward apparatus and method includes a frequency correction term so that when one frequency correction term is selected in place of another frequency correction term the phase of the clock signal remains free from extraneous frequency or phase variations during the transition between frequency correction terms. Alternatively, the synthesizer correction term includes a phase correction term so that phase coherence between the reference signal and the clock signal results.
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Hewlett--Packard Company
Imperato John L.
Tse Young T.
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