Patent ID: 8502724

Claim:
A semiconductor device comprising: a plurality of sensors arranged in rows and columns; a plurality of sensor output signal lines wherein the sensors in the same column are connected to a corresponding one of the plurality of sensor output signal lines; an output circuit connected to the corresponding one of the plurality of sensor output signal lines, the output circuit comprising: an analog-to-digital converter circuit configured to convert an analog signal input to the corresponding one of the sensor output signal lines from the sensor into a digital signal and output the digital signal; a resistance wiring including a plurality of resistors connected in series in a loop shape; a first switch configured to control connection between the resistance wiring and a first power supply line; a second switch configured to control connection between the resistance wiring and a second power supply line; and a reference voltage output signal line, wherein the analog-to-digital converter circuit and the resistance wiring are connected to each other through the reference voltage output signal line, and wherein one or more of the resistors are connected in series between the first switch and the second switch in the resistance wiring.