Patent ID: 6868249

Claim:
A fixing apparatus comprising: a heating member; a coil which generates a high-frequency magnetic field by a high-frequency currently flowing therethrough to inductively heat the heating member; a rectifier circuit which converts a voltage of an AC power supply into a DC voltage having a predetermined level, irrespective of a level of the voltage of the AC power supply; and a high-frequency generation circuit which generates the high-frequency current from an output voltage of the rectifier circuit, wherein the rectifier circuit includes a plurality of diodes, a plurality of capacitors and a plurality of contacts and functions as one of a first rectifier circuit and a second rectifier circuit in accordance with opening and closing of each of the contacts, the first rectifier circuit converting the voltage of the AC power supply into a DC voltage whose level is twice as high as that of the voltage of the AC power supply and the second rectifier circuit converting the voltage of the AC power supply into a DC voltage whose level is equal to that of the voltage of the AC power supply.