Rectification is the process of converting alternating current (AC) to direct current (DC) using rectifier circuits. There are two main types of rectifiers: half-wave and full-wave. A half-wave rectifier uses a single diode to pass only the positive half of the AC waveform, resulting in a DC output that fluctuates between 0V and the peak voltage. A full-wave rectifier uses four diodes in a bridge configuration to rectify both the positive and negative halves of the AC waveform, producing a fuller DC output.