[sdiy] Crossfade circuit for CVs?

[fmg]

I've drawn a draft of a VC balance circuit with a TL082 and 2 FETs
some time ago but don't remember where is it. Basically was an inv
and non-inv cofiguration driving the gates of Fets. Another way is
configuring it has dual non-inv with a P-Fet/N-Fet working in the
feedbacks but I can't imagine how this will work with CVs.
Of course, linearity will be only a dream... if it works.

I did that draft thinking in AC but it's interesting thinking it
with CVs. (I can imagine the drama this will bring, perhaps, for
some reason it's dead in papers)


Fabio Gonzalez
Posadas, Argentina


jorgen.bergfors at idg.se wrote:
> 
> >If it doesn't need to be fast, build a "pot" from two Vactrols.
> 
> Thanks for the tip Jürgen. I had thought of Vactrols, and your
> implementation indeed looks good.
> But eventhough this is a low parts count solution, it isn't necessarily a
> cheap solution.
> The circuit I'm going to contol with this, already contains 12 Vactrols, so
> I'm not so keen on adding 24 more Vactrols. But If there is no cheaper
> solution, I might do it anyway.
> 
> /Jörgen