Patent ID: 7372245

Claim:
A semiconductor integrated circuit comprising a temperature sensor circuit, the temperature sensor circuit including: a first transistor having a collector supplied with a first potential and an emitter through which a first current flows; a plurality of transistors having collectors supplied with the first potential and each of which has a same emitter size as the first transistor, emitters of the plurality of transistors being connected in common, collectors of the plurality of transistors being connected in common, bases of the plurality of transistors connected in common, a first resistor having one end connected to the emitters of the plurality of transistors; a second resistor connected in series with the first resistor; a third resistor having one end connected to the emitter of the first transistor; a first MOSFET provided between another end of the second resistor and another end of the third resistor, and a second potential different from the first potential; and a differential amplifier circuit of a CMOS configuration, which receives an emitter voltage of the first transistor and a voltage of a connecting point of the first resistor and the second resistor, and forms an output voltage such that both voltages become equal, and which supplies the output voltage to a gate of the first MOSFET, wherein said temperature sensor circuit forms a temperature sense voltage from both ends of the sixth resistor.