Patent ID: 8212540

Claim:
A voltage generating circuit comprising: a voltage converter for voltage-converting a reference voltage; and an output unit for impedance-converting the voltage outputted from the voltage converter, wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit, and a voltage level of the high-voltage-side power supply in the output unit is set to be higher than a voltage level of the high-voltage-side power supply in the voltage converter, wherein the voltage converter comprises: an operational amplifier provided with an input terminal to which the reference voltage is inputted and an output terminal; a variable resistance connected to the output terminal; and a controller for controlling the operational amplifier, and wherein the operational amplifier is configured to operate as a voltage follower in accordance with the control by the controller and thereby divides an output voltage thereof by the variable resistance and outputs the divided voltage.