[sdiy] Re: Ladder filter variations

[Don Tillman]

   > Date: Sun, 06 Mar 2005 15:05:15 +0100 (CET)
   > From: Magnus Danielson <cfmd at bredband.net>
   > 
   > > From: Don Tillman <don at till.com>
   > > Date: 05 Mar 2005 23:53:57 -0800
   > >
   > >    http://www.pat2pdf.org
   > 
   > How long I have wated for something similar. I've been
   > considering hacking a wrapper to the Espacenet server(s) to give
   > me full PDFs.

Hey Magnus!

I posted about the pat2pdf tool here about 5 months ago, but I figured
a reminder would be a good thing.  

(It's also mentioned in my blog. You do read my blog, right?  :-) )

Yes, I agree, it's a great tool and I was waiting for it too.  

   > >   US 6,084,470
   > > This patent is an insane collection of unusual ladder filters.  
   > 
   > Many thanks for the link and the patent number. Yes, it is
   > insanely many.

There's an underlying point here: I think the synth-diy community is
not being as creative as we ought to be.  If we still had the wildly
adventurous spirit that was thriving during the 60's and 70's, one of
us would have published a really fine collection of ladder filter
variations way before this patent was filed.  

Or, in other words, "Crap!  Why didn't *I* think of that?"

  -- Don

-- 
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com