S&H

[tomg]

Does anyone have a good sample and hold. I thought I would try
something in the way of pot reduction, but everything I have
tried starts to leak sooner or later. Has anybody tried those
s&h chips Paul S. sells. Got any ideas?

What I would like to be able to do is. Apply and sample a  voltage.
Then remove the source and the sampled voltage stay where I left
it for a long long time.

I have tried fets/otas/3900s/4016s....? and all kinds of caps but
polystyrene types seem to be the best.

-tg