Photodetector circuit
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United States of America Patent
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Aug 19, 2014
Grant Date -
Oct 3, 2013
app pub date -
Dec 13, 2012
filing date -
Dec 13, 2011
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Abstract
Light from a photodiode is detected using a phototransistor. At the time of startup, set data concerning a detected current is received at a communication interface, and the received set data is compared with the detected current. A control unit adjusts a current of the phototransistor so that the detected current matches the set data.
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