System and method for wide-range high-accuracy-low-dropout current regulation
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United States of America Patent
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Nov 23, 2010
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app pub date -
Jan 31, 2008
filing date -
Feb 3, 2007
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Abstract
The invention teaches a semiconductor circuit for driving an LED in which the current passing through the LED is regulated by adjusting the NMOS Rdson using a series of digital signals. The circuit maintains a high current accuracy over wide range of current changes while keeping a low voltage drop.
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