Clock signal and supply voltage variation tracking
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United States of America Patent
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Jan 29, 2019
Grant Date -
Oct 5, 2017
app pub date -
Jun 20, 2017
filing date -
Jun 10, 2015
priority date (Note) -
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Abstract
Embodiments disclosed herein provide an apparatus comprising a clock generation circuit configured to generate a first signal for a first time period and a second signal for a second time period, a charge pump circuit coupled to the clock generation circuit and configured to generate a first voltage and a second voltage based, at least in part, on the first time period and the second time period, and a comparison circuit coupled to the charge pump circuit, the comparison circuit configured to compare a difference between the first voltage and the second voltage with a threshold value and generate an active tracking enablement signal in response to determining that the difference between the first and second voltages exceeds the threshold value.
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