Difference between Active Filter and Passive Filter
Contents
Comparison between Active Filter and Passive Filter
- The Key Difference Between Active and Passive Filter is that the Active Filter use transistors and operational amplifier for the filtration process. And in the Passive Filter use resistance, inductor, and capacitor for signal generation. There is another difference is that active filter requires an external power supply whereas passive filters operate only on the signal input.

Comparison Chart
Active Filter | Passive Filter |
---|---|
It uses active devices like Transistor, Op. Amps. etc. | It uses passive devices like Resistor, Capacitor, Inductor, etc. |
Frequency is response more sharper | Frequency is response less sharper. |
More expansive | Less expensive |
More complex | Less complex |
More sensitive | Comparatively less sensitive |
Comparatively less sensitive | Lower Gain |
High Q factor | High Q factor |
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