[sdiy] vactrol transfer function

[Chris Muir]

On Dec 31, 2010, at 11:01 AM, David G. Dixon wrote:
> 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.


I haven't analyzed it closely, but I don't think that a low pass would quite get you there. With many Vactrols, the turn-on time is shorter than the turn-off time. Maybe a slew with different rise and fall time constants?

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