spice opus

[Hess Hodge]

I found this today and it might be of some interest...

Spice Opus is a port of Brekley Spice3f4 that includes a set of
optimization routines that find values of components that satisfy
specified conditions.  Included on the web-page is an example that
optimizes the resistors in a tri-to-sine converter so that the purest
possible sine wave is produced.  Also, there are a lot of examples that
involve filters and signal generators.  Software is available for download
for Win9x/NT and Linux.  I have not used it myself, yet... ;)

http://www.fe.uni-lj.si/~spice/welcome.html

Hess