Current control for output device biasing stage
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United States of America Patent
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Jul 26, 2016
Grant Date -
Sep 3, 2015
app pub date -
May 15, 2015
filing date -
Mar 4, 2013
priority date (Note) -
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Abstract
Circuits and methods to control current through a device biasing an output device in case the supply voltage is not higher than the output voltage are disclosed. The circuits and methods are applicable to e.g. LDOs, amplifiers, or buffers. A control loop detects if the supply voltage is not higher than the output voltage and regulates the drain-source voltage of the biasing device. The disclosure reduces power consumption in a driver stage in case the supply voltage is not higher than the output voltage.
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