[sdiy] Basic 4th order LP butterworth filter papers

[Aaron Lanterman]

On Feb 4, 2010, at 8:51 PM, Karl Ekdahl wrote:

> I'm looking for info on the basic building blocks of an *active* 4th order butterworth LP filter, so far the internet has given me nothing. If anyone have any pointers i'd sure appreciate it!

Don't know if this will have what you want, but it's the first place I always look:

http://users.ece.gatech.edu/mleach/ece4435/filtrpot.pdf

- Aaron