PURPOSE: To increase an amplitude of an output voltage only by adding a simple circuit component to the voltage comparator circuit.

CONSTITUTION: First and second input transfer FETs 7, 8 have a voltage drop corresponding to a comparison input voltage, and a voltage drop of a 1st positive feedback FET 15 and a 1st current supply use FET 19 connected in series to the FETs 7, 8 and outputting a respective voltage to other terminals than the connected terminal is changed by an output voltage of a 2nd source follower circuit comprising FETs 12, 22 resulting from an amplified and level-shifted output voltage of a 2nd input transfer FET 8, and similarly, a voltage drop of the FETs 16, 22 is changed by an output voltage of a 1st source follower circuit comprising FETs 11, 21 resulting from an amplified and level-shifted output voltage of a 1st input transfer FET 7, and a current branch FET 23 receiving a prescribed bias voltage at its gate connects output terminals of the 1st and 2nd positive feedback use FETs 15, 16.