What are the 4 types of active filter?

Types of Active Filters

Active filters are electronic filters that use active components to amplify signals or introduce reactive components without the need for inductors. These filters are crucial in signal processing, allowing for the manipulation of signal frequencies to meet specific requirements. There are four primary types of active filters, each designed for specific frequency range operations.

1. Low-Pass Filter

A Low-Pass Filter

2. High-Pass Filter

A High-Pass Filter

3. Band-Pass Filter

A Band-Pass Filter

4. Band-Stop Filter (Notch Filter)

A Band-Stop Filter

Each of these filters can be designed with various response characteristics, such as Butterworth, Chebyshev, and Bessel, depending on the application's requirements. Active filters are favored over passive filters for their ability to provide gain, higher input impedance, and greater flexibility in adjusting filter parameters.