Patent ID: 7205755

Claim:
A semiconductor integrated circuit comprising: a temperature sensor circuit including, a first transistor which allows a first current to flow through an emitter thereof; second transistors each of which allows such a second current as to reach a current density smaller than a current density of the emitter of the first transistor to flow through an emitter thereof; a first resistor provided between the emitter of the first transistor and the emitters of the second transistors; a second resistor provided between the emitter of the first transistor and a circuit ground potential; a third resistor provided between a collector of the first transistor and a power supply voltage; a fourth resistor provided between collectors of the second transistors and the power supply voltage; and a differential amplifier circuit which receives a collector voltage of the first transistor and a collector voltage of each of the second transistors therein and forms such an output voltage that both become equal, and which supplies the output voltage to bases of the first and second transistors in common, and wherein said temperature sensor circuit forms a temperature sense voltage from a connecting point of the first and second resistors.