Ripple (electrical)
= Ripple (electrical)
{wiki=Ripple_(electrical)}
Ripple in the context of electrical and electronic engineering refers to the small, unwanted AC (alternating current) voltage variation that is superimposed on the DC (direct current) output of a power supply, particularly after rectification. When AC voltage is rectified to produce a DC voltage, the output does not perfectly smooth out to a flat line; instead, it retains some fluctuations known as ripple.