help in filter designing

[guy]

Hello,
I am doing a project about filters, I am looking for some information about how to choose the resistors and capacitors in filters values (Butterworth, Chebyshev and Bessel) acording to the band frequancy I choose.
Thank's

[R-ay]

Good bit of info that was put out by IC maker; Maxim

http://www.icaen.uiowa.edu/~bme080/supplementary_info/AnalogFilterDesign.pdf

Pretty Kool DOS proggy to make filters;

http://www.stanford.edu/class/ee122/Handouts/handouts.html