LEVEL SHIFT CIRCUIT

PROBLEM TO BE SOLVED: To provide a level shift circuit which can easily correspond to a power source change and whose circuit area is prevented from becoming large when a power source is changed. SOLUTION: When power voltage Vcc is inputted to an input terminal IN, high voltage HV is outputted from an output terminal OUT. When "0" (ground) is inputted to the input terminal IN, "0" is outputted from the output terminal OUT. In the circuit, FET 15 and 16 operate as resistors and resistance values change in accordance with voltage VB supplied to respective gates. Namely, synthesized resistance of FET 14 and 16 cab be changed and on-resistance of FET 14 can be changed by adjusting values of resistors 18 and 19. When power voltage is changed, on-resistance of FET 14 can be changed by adjusting the resistance values of the resistors 18 and 19 even if channel areas of FET 12 and 14 are not changed, and the circuit can easily correspond to a power voltage change. COPYRIGHT: (C)2004,JPO&NCIPI