Howtosignalprocessing
A passive filter is a filter built using passive components such as resistors, capacitors, and inductors. An active filter is built using active components such as amplifiers as well as passive components.
Which is an active filter?
An active filter is a type of analog circuit implementing an electronic filter using active components, typically an amplifier. Amplifiers included in a filter design can be used to improve the cost, performance and predictability of a filter.
What is passive filters?
Passive filters are made of passive components (inductance, capacitance, and resistance) tuned to the harmonic frequencies that are to be attenuated. The values of inductors and capacitors are selected to provide low impedance paths at the selected frequencies.
