Digital output voltage regulation circuit having first control loop for high speed and second control loop for high accuracy
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United States of America Patent
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Nov 28, 2006
Issued Date -
N/A
app pub date -
Mar 18, 2005
filing date -
Mar 18, 2005
priority date (Note) -
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Abstract
A switched mode voltage regulator has a digital control system that includes dual digital control loops. The voltage regulator comprises at least one power switch adapted to convey power between respective input and output terminals of the voltage regulator and a digital controller adapted to control operation of the power switches responsive to an output of the voltage regulator. The digital controller further comprises dual digital control loops in which a first control loop provides high speed with lower regulation accuracy and a second control loop has high accuracy with lower speed. Thus, the digital control system provides the advantages of both high speed and high regulation accuracy.
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