ACCURATELY DETECTING LOW CURRENT THRESHOLD
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United States of America Patent
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Issued Date -
Sep 8, 2016
app pub date -
Mar 4, 2016
filing date -
Mar 5, 2015
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Abstract
A threshold detection circuit may sense when current between a power supply and a load reaches a current threshold level. The threshold detection circuit may include a transistor in series with the load; a feedback circuit that causes the voltage drop across the transistor to be constant while the transistor is conducting current between the power supply and the load; a constant current source that delivers a constant current into the load; and a comparator that indicates when the voltage drop across the transistor falls below a voltage threshold level.
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