[sdiy] 5-scroll chaos circuit

[Dave Manley]

Ian Fritz wrote:
> Hi all --
> 
> Here's an interesting chaos generator I recently came across.  These 
> guys basically use a Serge-type wavefolder in the feedback path of a 
> 3d-order LP filter.  They use OTA cells to make the folder.  One thing I 
> noticed is that the transfer function starts out low and ends up high.  
> I tried using some waveshapers in a filter feedback loop once and never 
> got any results.  This overall comparator-like function may be the key.
> 
> http://www.ecse.rpi.edu/%7Ekhaled/papers/El_2002.pdf
> 

A while ago I looked at the various published wavefolders (JH, Ken 
Stone, etc) and don't recall any of them using this structure.  Is this 
use of OTA cells well known and used in other wavefolders.  You mention 
Serge, is this essentially the Serge topology?

-Dave