[sdiy] interesting expo design

[patchell]

    Been there...Done that...sorta...

    I saw that article some months back, and the solution I came up with is here:

http://www.silcom.com/~patchell/seqproj/1001013.pdf

    On page 10.  I used a single LM13700 (although both OTAs are used) as the VCA.  The boards
that this is on will be in my greasy little hands in a couple of days.  Earlier experments say
this should work really good.  I will keep you posted as to the results.

Michael Ruberto wrote:

> this is interesting, check it out:
>
> http://www.e-insite.net/ednmag/index.asp?layout=article&articleid=CA178103&industryid=2281
>
> the problem I see with this approach is adding in external CVs. I suppose it
> could be done using a very precise VCA. the external CV's can be summed into
> the VCA's CV input and the reference from IC3 connected to IC1's + input
> through the VCA? hmmm I imagine there would have to be some offset
> correction too.
>
> may have to experiment with this...
>
> ~M
>
> _________________________________________________________________
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--
 -Jim
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