[sdiy] Pole Dancing

Dave dlmanley at sonic.net
Tue Sep 18 20:16:20 CEST 2018

Cool stuff.  Wish there were interactive tools like this when i took related coursework back in 1980.  :-)

Can you change the clear to reset the feedback sliders (or add a separate clear for that).


On September 18, 2018 10:44:33 AM PDT, Donald Tillman <don at till.com> wrote:
>Hey folks,
>Since we've been talking about filters lately...
>There are several classes of active filters (state variable, gyrator,
>etc.), but one that's especially interesting is where you start with a
>passive RC filter, with poles on the real axis, and apply feedback,
>liberating the poles into the wonderment of the complex plane.
>Here's a Javascript simulation I wrote of exactly that:
>    Root Locus Demo of Real Poles with Feedback
>    http://till.com/articles/poledance
>Have fun with it.  Tell me what you think.  Ask questions.  Explore.
>  -- Don
>Donald Tillman, Palo Alto, California
>Synth-diy mailing list
>Synth-diy at synth-diy.org
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