> Check his original URL: The author has a clever way of building the
> prewarping into the bilinear transform. Dunno if I'd want to make a
> habit of using it, but it's cute.
If w0 is half way between the edges of a bandpass filter in the s
domain, it won't be after bilinear transformation. The simplest way I
know is too specify the band edges separately, not band center and
bandwidth. How does the prewarped transform handle that?o
Engineering is the art of making what you want from things you can get.