FET current regulation of LEDs
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United States of America Patent
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Aug 23, 2005
Grant Date -
Jan 22, 2004
app pub date -
Jun 27, 2003
filing date -
Jun 27, 2002
priority date (Note) -
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Abstract
Field Effect Transistors (FETs) are used to regulate current in a light emitting diode (LED). FETs are fundamentally voltage driven devices, where output current is governed by junction voltage. Since junction voltage can be controlled with little or no support circuitry, FETs present a solution to current regulation where cost, complexity, and perhaps even size are important.
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