PURPOSE: To make the voltage margin between output voltages larger, by connecting the 1st∼4th resistances in series between the 1st and 2nd electric potentials and installing two switches to their prescribed connecting points, and then, fetching an output from the connecting point of the 2nd and 3rd resistances.

CONSTITUTION: Resistances R11∼R14 are connected in series between a supply voltage VCC and earth and a PNP transistor (TR) Q11 and NPN TR Q12 are connected between the power source VCC and the connecting point of the resistances R13 and R14 and between the connecting point of the R11 and R12 and earth, respectively, and then an output terminal 3 is taken out from the connecting point of the R12 and R13. When both input terminals 1 and 2 to the TRs Q11 and Q12 are in low level, the terminal 1 is in low level and the terminal 2 is in high level, the terminal 1 is in high level and the terminal 2 is in low level, and both the terminals 1 and 2 are in high level, the output voltage of the terminal 3 becomes V1=VCC, V2=VCC×(R13+R14)/(R11+R12+R13+R14), V3= VCC×R12/(R12+R13), and V4=earth, respectively. By selecting the resistance value, an intermediate optional value can be set between the supply voltage and earth.