Method and system for managing reference signals for network clock synchronization
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United States of America Patent
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Mar 12, 2002
Issued Date -
N/A
app pub date -
May 4, 2001
filing date -
Dec 17, 1999
priority date (Note) -
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Abstract
Methods and systems are disclosed for eliminating a phase transient of a controlled frequency oscillator, caused by replacing a first reference signal by a second reference signal when the first reference signal becomes corrupted or otherwise unavailable, and for running a controlled frequency oscillator in a frequency-controlled holdover mode. The contradictory requirements of using a relatively low-cost controlled frequency oscillator tunable over a relatively wide frequency range and achieving high stability of its frequency in holdover mode are satisfied.
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