Tunable current driver and operating method thereof
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United States of America Patent
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May 22, 2012
Grant Date -
Nov 12, 2009
app pub date -
Dec 25, 2008
filing date -
May 7, 2008
priority date (Note) -
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Abstract
A tunable current driver comprising a semiconductor memory device and a selective transistor is provided, in which one of the source/drain pair of the semiconductor memory device is electrically coupled with a lighting device, and one of the source/drain pair of the selective transistor is electrically coupled with the gate electrode of the semiconductor memory device. The semiconductor memory device not only acts as “drive transistor” to drive the lighting device, but also is capable of adjusting the threshold voltage thereof.
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