Complementary IIR Filters

[Brahim HAMADICHAREF]

Chris Townsend wrote:
> 
> I'm trying to design complementary IIR filters (i.e. magnitude response
> adds to one) so I can make a two band crossover network.  Of course I could
> just use standard low pass and high pass filters with the same cutoff
> frequencies, but in general there will be phase discrepancies between the
> two filters such that if the bands get mixed back together a notch will
> occur at the cutoff.  Any of you know of a good way to do this?
> ...
> Thanks,
> Chris

I find

http://www.dreamlabs.com/~webland/c_p/ic93/ic93s307.htm#p0193

Cool link pointer http://www.dreaming.org/~webland/

Regards.

-- 
*******************************************************************
* Brahim Hamadicharef PhD student - Centre for Intelligent        *
* Systems, University of Plymouth, Drake Circus, Plymouth PL4 8AA *
* Devon,England     URL: http://www.cis.plym.ac.uk/cis/brahim     *
* Tel: 44-1752-233512 / Fax: 44-1752-232583                       *
*******************************************************************