Event-driven clock duty cycle control
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United States of America Patent
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Feb 7, 2017
Grant Date -
Nov 13, 2014
app pub date -
Nov 16, 2012
filing date -
Dec 5, 2011
priority date (Note) -
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Abstract
Duty cycle error vectors that indicate both the magnitude and direction of the duty cycle error relative to a desired duty cycle are generated within a duty cycle measurement circuit, enabling threshold-based determination of whether duty cycle adjustment is necessary, refraining from power-consuming adjustment and follow-up measurement in those cases where the duty cycle is within a target range. When duty cycle adjustment is deemed necessary, the magnitude of the duty cycle error indicated by the duty cycle error vector may be applied to effect proportional rather than incremental duty cycle adjustment, quickly returning the clock duty cycle to a target range.
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