A rectifier is an electronic device that converts the power generated by an engine, APU, or Ground Power Unit (GPU), typically, 120V AC to 28V DC power for various electrical components available in aircraft. The most common type of rectifiers used in aircraft are dry disk rectifiers and solid-state rectifiers. As commonly used rectifying methods in modern aircraft are half-wave and full-wave, we will be looking at these particular methods in more detail to better understand how they compare and contrast.