[sdiy] Switched capacitor filters

Neil Johnson neil.johnson97 at ntlworld.com
Thu Dec 20 11:03:07 CET 2012


Jim Credland <jim at cernproductions.com> wrote:
> Anyone done much work with these?  I got this far yesterday with an
> MF10:
>   http://voodooinsomnia.blogspot.co.uk/2012/12/mf10-switched-capacitor-filter.html
> Mostly sounds good, but useless for a normal VCF as the clock starts to
> creep in.  I also suspect, although I've not tested it, that if I used
> it in an HPF configuration I'd start to hear aliasing at lower filter
> frequencies.
> Now if I could get one that had a 20Mhz maximum clock speed...?  I've
> seen versions that go up to 6Mhz or so.

Tim Stinchecombe did some work with the LMF100 switched capacitor filter chip:


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