Relaxation oscillator
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United States of America Patent
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Aug 13, 2013
Grant Date -
May 24, 2012
app pub date -
Sep 19, 2008
filing date -
Sep 19, 2008
priority date (Note) -
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Abstract
A relaxation oscillator and a method for offset cancellation in a relaxation oscillator. The relaxation oscillator comprises two comparator units, each comparator unit comprising a comparator element and a memory element; and a switch control generator coupled to each of the comparator units; wherein each comparator unit, in a reset state, stores an input-offset voltage on the memory element under the control of the switch control generator such that, in a comparison state, the input-offset voltage is applied to both inputs of the comparator for implementing an offset-free threshold.
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