Inductor filter circuit

Inductor filter circuit

Since the DC resistance of the inductor is small, but the AC impedance is large, it has the characteristics of hindering the change of current
. Therefore, the DC component basically has no loss after passing through the inductor , but for the AC component, a voltage drop will occur on L, thus Reduce
the ripple component in the output voltage. Obviously, the larger L and the smaller RL, the better the filtering effect, so inductor filtering is suitable for occasions with large load current .