[sdiy] Web info on Voltage Control Methods?

[patchell]

    Look at the CA3280 (OTA)  stuff on this
page:http://www.oldcrows.net/~patchell/archives/archives.html

    There is not a lot of detail there, i.e. no descriptions of the
circuits.

    For a description of how an OTA works, look here:


http://www.uni-bonn.de/~uzs159/ota3080.html



GoddRobert at aol.com wrote:

>   I'd like to use a 0-2v envelope in a toy keyboard to VC a simple res
> filter.
> My understanding of VC methods currently stops at LED-photocells. The
> Active
> Filter Cookbook describes MOSFET and JFETs as "older approaches to
> voltage-controlled resistance" and goes on to talk about using
> multipliers
> and switches. So that hasn't been helpful. I've had a tough time of
> finding
> specific, usable info on the net. But I'm still searching. I was
> hoping
> someone could point me in the right direction. I'm sure it's easier
> than it
> seems.

--
 -Jim
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