ELECTRIC POWER SUPPLY CIRCUIT AND SEMICONDUCTOR DEVICE

PROBLEM TO BE SOLVED: To output a voltage with reduced dependence on a load current. SOLUTION: An electric power supply circuit 1 comprises a direct current stabilization part 10, a high-frequency response part 20, and a first capacitor 30. The direct current stabilization part 10 has a reference voltage correction circuit 12, which can be composed of an operational amplifier. A reference voltage Vref+a threshold voltage Vth of a first NMOS 26 is inputted to the non-inverting input terminal of the operational amplifier, and an output voltage Vout is inputted to its inverting input terminal. The difference voltage between the two input terminals is amplified and outputted to the gate of the first NMOS 26. The high-frequency response part 20 turns off the first NMOS 26 and a first PMOS 24 when the output voltage Vout is greater than the voltage inputted to the first NMOS 26, and stops the supply of an electric current to the load. It turns on the first NMOS 26 and the first PMOS 24 when the output voltage Vout is smaller than the voltage inputted to the first NMOS 26, and supplies an electric current to the load. COPYRIGHT: (C)2006,JPO&NCIPI