[sdiy] vactrol transfer function

[Kyle Stephens]

The app note here doesn't have any hard and fast formulas (nor do the datasheets), just a graph to eyeball:

http://denethor.wlu.ca/pc300/optoisolators/analogoptoisolatorintroduction.pdf

Suppose you could measure current vs resistance at a few values and interpolate with Excel (iirc you've used that plenty).

HTH, and Happy New year!


_Kyle

--- On Fri, 12/31/10, David G. Dixon <dixon at interchange.ubc.ca> wrote:

> From: David G. Dixon <dixon at interchange.ubc.ca>
> Subject: [sdiy] vactrol transfer function
> To: synth-diy at dropmix.xs4all.nl
> Date: Friday, December 31, 2010, 11:01 AM
> Hey Team,
> 
> Does anyone here have a transfer function for a
> vactrol?  I'm wondering
> whether it can't be approximated by putting the CV of a VCA
> through a LPF.
> 
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