Quality of phase lock and loss of lock detector
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United States of America Patent
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Jan 1, 2013
Grant Date -
Sep 15, 2011
app pub date -
May 23, 2011
filing date -
Jun 19, 2007
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Abstract
A systems and methods for providing phase lock conditions detection, such as a quality of phase lock and loss of lock detection, are described herein. One exemplary method comprises detecting an output frequency, comparing the output frequency with a first reference signal, providing a first signal and a second signal as a function of the output frequency and first reference signal comparison, receiving a predetermined threshold from a second reference signal, monitoring a deviation of the first and second signals from the predetermined threshold, generating a third signal as a function of the deviation, comparing the third signal to a window threshold wherein the window threshold is set based on a predetermined loop variable, generating a fourth signal a function of the third signal and the window threshold comparison, and providing an alarm based on the fourth signal.
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