Wave Wraper

[Thierry Rochebois]

>I designed (and never built) a "wave folder".  the design was to all
>a controllable setpoint at which the wave would fold over and go in
>the opposite direction.  The reason I never built it is that I realized
>my design caused the overall output to change dramatically with the
>setpoint.  I would have needed a VCA on the output, controlled by
>the setpoint to pump it up.


I think I am designing the same kind of "wave folder". It will fold negative
and positive many times, sort of "multi-triangle" function.
Each stage will fold over and below a threshold voltage (positive and
negative).
I think that it can be done with very few components : a pair of diodes
(fixed but
easy threshold) and a  amplifier/substractor (folding). The slope of the
foldings may
be controled by some gain pot somewhere I guess.
Hope I will have time to test my design this WeekEnd.

Regards,

Thierry