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Precise variable-Q filter design [DSP Tips & Tricks]

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1 Author(s)
Engelberg, S. ; Electron. Dept., Jerusalem Coll. of Technol., Jerusalem

In this article, it describe two ways to implement a variable-Q digital filter. First, present a simple variable-Q filter and then illustrate why its frequency response is less than ideal. Next, show a trick to modify that filter, making its performance nearly ideal. As always, the choice of which filter to use is made based on the user's application.

Published in:

Signal Processing Magazine, IEEE  (Volume:25 ,  Issue: 5 )