[sdiy] Pole Dancing

Donald Tillman don at till.com
Tue Sep 18 20:40:09 CEST 2018

Thanks.  Yeah, that's a bug.  Good catch!  'Fixed.

  -- Don
Donald Tillman, Palo Alto, California

> On Sep 18, 2018, at 11:16 AM, Dave <dlmanley at sonic.net> wrote:
> 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).
> -Dave
> 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 <http://till.com/articles/poledance>
> Have fun with it.  Tell me what you think.  Ask questions.  Explore.
>   -- Don
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