Patent ID: 8403559
Filing Date: 2013-03-26
Classification: G01K

Abstract:
1. A two-terminal semiconductor sensor device to be connected to an external device through two terminals, comprising: a first external terminal to be connected to a ground potential that is common to the external device; a second external terminal for receiving an operating current from the external device; a sensor circuit for measuring one physical amount to output a voltage based on the one physical amount, wherein the one physical amount comprises temperature, and wherein the sensor circuit comprises: a voltage dividing circuit for dividing a voltage between the first external terminal and the second external terminal to output a divided voltage; a differential amplifier circuit for receiving the voltage output from the sensor circuit and the divided voltage to output a voltage based on a difference therebetween; and an output transistor having a gate connected to an output terminal of the differential amplifier circuit, a drain connected to one of the first external terminal and the second external terminal, and a source connected to another one of the first external terminal and the second external terminal.