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US 2013/0256507 A1Published application
Photodetector circuit
AssigneeSemiconductor Components Industries, LLC
InventorsYoshihisa Tabuchi, Yasunori Nagata
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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.
Claims3
A photodetector circuit for detecting light from a photodiode using a phototransistor, comprising:
- a communication circuit that receives, at a time of startup, set data concerning a detected current;
- and
- a control unit that compares the set data received by the communication circuit with the detected current, and adjusts a current of the phototransistor so that the detected current matches the set data,
- wherein the control unit performs control at the time of startup so that the current that flows through the phototransistor matches the set data.
1 more element
Dependencies are inferred from the claim text.