Patent ID: 7656225

Claim:
A voltage generation circuit, comprising: a reference voltage generation circuit for generating a reference voltage; a differential amplifier having a first input terminal to which the reference voltage is input, a second input terminal, and an output terminal; an output node for outputting an output voltage; a P-channel MOS transistor having a source to which a power supply is connected, a drain, and a gate to which the output terminal of the differential amplifier is connected; a first resistor series connected between the drain of the P-channel MOS transistor and the output node; a second resistor series connected between the output node and the second input terminal of the differential amplifier; a third resistor series connected between the second input terminal of the differential amplifier and a ground; and a selection control circuit for selecting a resistance of the first resistor series, a resistance of the second resistor series, and a resistance of the third resistor series, and when controlling the resistance of the first resistor series and the resistance of the second resistor series to be different from each other, the selection control circuit controls such that a sum of the resistances of the first resistor series and the second resistor series is constant.