Spread Spectrum Clock Signal Detection System and Method
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United States of America Patent
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Issued Date -
Jun 6, 2013
app pub date -
Sep 11, 2012
filing date -
Dec 2, 2011
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Abandoned
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Abstract
A spread spectrum clock signal detection system includes: a spread spectrum clock signal input terminal; a reference clock signal input terminal; a frequency difference detection module connected with the spread spectrum clock signal input terminal and the reference clock signal input terminal; a spread spectrum pulse detection module connected with the spread spectrum clock signal input terminal, the reference clock signal input terminal and the frequency difference detection module; a spread spectrum value calculating module connected with the spread spectrum pulse detection module; a spread spectrum value reference input terminal connected with the spread spectrum value calculating module; and an output module connected with the spread spectrum value calculating module, wherein the spread spectrum clock signal detection system judges whether the spread spectrum clock signal exists according to the information of the spread spectrum value with magnitude and direction. A spread spectrum clock signal detection method is also provided.
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