Filters are defined as the electronic circuits which are used to remove unwanted frequency components and enhance the wanted ones from the signal.

They are used with rectifiers in order to get a pure ripple free DC voltage.

Types:

Some of the common filters that are used with rectifiers are as follows:

1. Shunt Capacitor filter
2. Series inductor filter
3. LC filter
4. CLC filter, also known as π-filter