[sdiy] LM13700 as VC resistor
didierleplae at yahoo.com
Sun Feb 9 02:21:37 CET 2020
I searched a bit in the archives, but didn’t find anything.
The H11F1 sounds interesting. I will look into that.
> On Feb 8, 2020, at 12:05 PM, music.maker at gte.net wrote:
> This has been bugging me because I seem to remember a thread here years ago. I can't
> remember what the outcome was, but maybe a search of the archives (for which I seem to have
> no foo) might find it. I do remember it was regarding the datasheet circuits mentioned by
> the OP. Generally, the feel I think was that under the right circuit circumstances, it can
> work like a VCresistor. I remember that the vactrol was compared and is known to work
> properly as a floating VCresistor albeit slow to change value. Not an EE here, but looking
> at the floating resistor circuit I see two current producing electrodes posing as a
> floating resistor. I think generally the statement about it's lack of use in synth
> circuits is due to it not being very good is probably correct. Looking at the single ended
> circuits, they are AC coupled...
> Has anyone experience with H11F1 devices? Those should be a lot faster than vactrols,
> probably more consistent, but I don't know if the transfer function is useful in
> audio/synth circuits.
> -- ScottG
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