SELF-CALIBRATION CIRCUIT FOR USB CHIPS AND METHOD THEREOF
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United States of America Patent
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Issued Date -
Oct 8, 2009
app pub date -
Apr 2, 2009
filing date -
Apr 3, 2008
priority date (Note) -
Abandoned
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Abstract
A USB chip having a self-calibration circuit is provided. The USB chip includes a comparing circuit, a digital circuit and an adjustable current output device. A close-loop structure is provided to monitor an output voltage level of the USB chip and then an output current is dynamically adjusted to calibrate the output voltage level.
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