Active Filter integrated circuits are analog signal-conditioning devices that implement frequency-selective filtering using active circuitry. Unlike passive filters, they incorporate active elements to provide controlled filtering behavior and can support functions such as buffering and gain while shaping the signal’s frequency response.
These ICs are used to realize common filter responses, including:
- Low-pass
- High-pass
- Band-pass
- Band-stop (notch)
Active filter ICs are typically selected when stable, repeatable filtering performance is needed within an integrated solution, helping simplify analog design by reducing reliance on purely passive filter networks.
