Abstract: When the input signal IN1 changes from a ground voltage GND to a first voltage -E1 and from the first voltage -E1 to the ground voltage GND, the output potential of the -E2 system flip-flop circuit changes gradually. The inverted signal from the -E1 system inverter circuit is supplied to the -E2 system inverter circuit earlier than the output signal (high-potential signal) of the -E2 system flip-flop circuit. This eliminates a period of time when all the MOSFETs in the -E2 system inverter circuit turn on simultaneously, thereby reducing a through current in the -E2 system inverter circuit. Consequently, the circuit operation can be stabilized by decreasing through currents flowing in the -E1 system inverter circuit and the -E2 system inverter circuit using the output signal of the -E2 system flip-flop circuit as an input.