Analog Devices AN-649 Active Filter Design Tool Application Note

About this manual

The Analog Devices Active Filter Design Tool assists engineers in designing all-pole active filters by defining the filter's response and topology. This document focuses on the first step: determining the filter response, such as attenuation and phase response. It discusses various standard responses including Butterworth, Chebyshev, Bessel, and linear phase filters.

What's inside

• Introduction
• Standard Responses
• Butterworth Filter
• Chebyshev Filter
• Bessel Filter
• Linear Phase with Equiripple Error
• Gaussian-to-6 dB and Gaussian-to-12 dB Filter
• Using the Prototype Response Curves

Frequently asked questions

What is the primary purpose of the Analog Devices Active Filter Design Tool?

The tool assists engineers in designing all-pole active filters by helping them determine the filter response and defining its topology.

What frequency range is shown for the amplitude response of 2- through 10-pole cases?

The amplitude response curves display the frequency range from 0.1 Hz to 10 Hz, with a detailed view of the 0.1 Hz to 2 Hz pass band.

How are the group delay, step response, and impulse response curves denormalized?

To denormalize these curves, you must divide the time axis by 2 π FC.