Temperature sensor circuit and semiconductor device including temperature sensor circuit

A semiconductor device comprising:

• a temperature sensor circuit which generates a signal;
• an output device;
• and
• a signal processing circuit which controls operation of the output device using the signal,
• wherein the temperature sensor circuit comprises:
• a first constant current circuit;
• a first semiconductor element where a first voltage is generated between a pair of terminals in accordance with a first current supplied from the first constant current circuit;
• a second constant current circuit;
• a second semiconductor element where a second voltage is generated between a pair of terminals in accordance with a second current supplied from the second constant current circuit;
• and
• an amplifier circuit which amplifies a difference between the first voltage and the second voltage and generates the signal, and
• wherein a rate of change in the first voltage with a first temperature of the first semiconductor element is greater than a rate of change in the second voltage with a second temperature of the second semiconductor element,
• wherein a value of the first temperature is the same as a value of the second temperature,
• wherein the second semiconductor element comprises an oxide semiconductor, and
• wherein the first semiconductor element comprises a semiconductor other than the oxide semiconductor.