[sdiy] generating an s-shaped curve

[Harry Bissell]

OK let me explain. I want to process a CV, so that there is increasing (non-linear) gain for signals above
a break point (maybe +1V) and that has (well) increasing gain going negative below that.

The idea, the 1V signals would be unaffected by the circuit, higher voltages would go progressively higher, and
lower voltages would go progressively lower.

I can think of a diode breakpoint generator, but I'm looking for more ideas :^)

H^) harry