Definition of Rectifier and its Types - Rectifiers or in Indonesian are called Wave Rectifiers is a part of a Power Supply Circuit that functions as a converter of AC (Alternating Current) signals to DC (Direct Current) signals. This Rectifier or Wave Rectifier circuit generally uses a Diode as its Main Component. This is because diodes have characteristics that only pass electric current in one direction and inhibit electric current from the opposite direction. If a Diode is alternating current (AC), then the Diode will only pass half the wave, while the half wave will be blocked