[sdiy] Ladder filter variations

[James Patchell]

Hell, not reading...break out the soldering irons.... :-)

At 09:46 AM 3/6/2005 +0100, Yves.Usson at imag.fr wrote:
>Hi Don
>
>Thanks a lot for these very interesting patents !
>It can foresee some long hours of fruitful reading
>this week end.
>
>Cheers
>
>Yves
>
>
> > [Itook the liberty of changing the subject line.]
> >
> > Magnus, Hairy Harry, Osamu-san, gentlefolks,
> >
> > If you're interested in variations on the ladder filter, I'll suggest
> > you go to the patent pdf tool:
> >
> >    http://www.pat2pdf.org
> >
> > And take a look at this guy:
> >
> >   US 6,084,470
> >   Filter Circuit Capable of Setting Various Filter Characteristics
> >   Shiramatsu, Nakamura, Goto
> >   Kabushiki Kaisha Toshiba
> >   July 4, 2000
> >
> > This patent is an insane collection of unusual ladder filters.
> >
> > Also check out these:
> >
> >   US 5,912,587
> >   Active Filter Stack
> >   Mihailovits, Beatson
> >   Mitel Semiconductor
> >   June 15, 1999
> >
> >   US 5,225,790
> >   Tunable Widband Active Filter
> >   Noguchi, Rinaldis, Esling
> >   Digital Equipment Corp.
> >   July 6, 1993
> >
> >   US 3,983,512
> >   Current Controlled Electrical Circuits
> >   Lipscombe
> >   Feedback Instruments Limited
> >   September 28, 1976
> >
> > I'm sure some of these have significant musical potential.
> >
> > Enjoy!
> >
> >
> >   -- Don
> >
> > --
> > Don Tillman
> > Palo Alto, California
> > don at till.com
> > http://www.till.com
> >
>
>
>
>-------------------------------------------------
>envoyé via Webmail/IMAG !

         -Jim
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