[sdiy] Pole Dancing

Donald Tillman don at till.com
Tue Jan 24 04:58:37 CET 2023

I wrote an article with a built in JavaScript root locus simulator.  Please enjoy:


"A passive filter built with just resistors and capacitors will have its poles positioned along the negative real axis. Adding feedback to such a circuit will cause the pole positions to move, first pairing up along the real axis, and then splitting off onto the complex plane. This is an interactive simulation of that behavior.

The technical term is root locus. I call it pole dancing, although as you will see, it ends up being something between a minuet and square dancing."

I think you'll find it interesting.

As far as I know, this is the only interactive simulation of a root locus plot.

  -- Don
Donald Tillman, Palo Alto, California

More information about the Synth-diy mailing list