Chris Morriss wrote:

If you want an easy way to design and simulate low/high/band-pass
filters of either Butterworth. Bessel or Chebychev with a conventional
op-amp architecture with first to eighth order response, then go to
the Microchip website and download 'Filterlab' (it's free).

Cheers for that - downloaded.


--
Wally
www.artbywally.com
www.wally.myby.co.uk/music