How to design analog active filters
Getting information from books
If you need a special active filter, e.g. for building active loudspeakers or medical electronic equipment, there are many ways you can go for designing this filter. You can use a book like Lancasters Filter Cookbook, "The Art of Electronics" by Horowitz and Hill or the books by Tietze-Schenk or von Wangenheim.
Using a special software tool
You can also use a filter design software.
We have read many books and have tested lots of programs. Finally we have arrived at the active filter design software AktivFilter. This software is easy to use and does a good job when you need an active filter with opamps. A free demo edition of this program is available for download. The demo edition has some limitations but we have found that it is a very useful tool.
What is given here
On this website we will show you some applications for this software. For this we will design some filters and give you some help in the usage of this program. All examples shown here were made using AktivFilter 3 Professional Edition under Windows 7 Ultimate 64 Bit and OrCAD PSpice 9.1 student edition.
