SENSOR PROCESSING CIRCUIT AND OFF-SET DETECTION METHOD OF THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a processing circuit of a photodiode sensor easily detecting off-set, and an off-set detection method of the processing circuit.SOLUTION: A sensor processing circuit includes: at least two photodiode sensors 12,22; a first terminal connected to an anode of the first photodiode sensor 12 and an anode of the second photodiode sensor 22; a second terminal connected to a cathode of the first photodiode sensor 12; a third terminal connected to a cathode of the second photodiode sensor; and a changeover section 13 changing over between extracting an output between the first terminal and the second terminal and extracting an output between the second terminal and the third terminal.