Patent ID: 7208924

Claim:
A semiconductor integrated circuit device which has a power supply circuit, the power supply circuit comprising: a differential amplifier including a first input terminal, a second input terminal, and an output terminal, being supplied with a high supply voltage and a low supply voltage having a voltage lower than the high supply voltage, which amplifies a difference of an input signal from the first input terminal and an input signal from the second input terminal and outputs the difference as an output signal; a transistor that is controlled on the basis of the output signal, and generates a voltage different from the high supply voltage and the low supply voltage; a first resistor connected between the output terminal of the transistor and the second input terminal of the differential amplifier; and a second resistor connected between the second input terminal of the differential amplifier and the low supply voltage to form a voltage-dividing resistor stage with the first resistor, wherein the power supply circuit includes a first phase compensating capacitor whose one end is coupled to the low supply voltage and the other end is connected to the voltage-dividing resistor stage and the second input terminal of the differential amplifier.