Chaos LFO : who to manage 1/X ?

[danial stocks]

I worked out a 1/X using LM13600 OTA.. I think the idea was that an OTA was 
fed it's input with a signal, o/p of the OTA [+buffer - vtg o/p] went to 
summing node on op amp.. op amp o/p drove bias pin on ota. + in on op amp = 
a cont vtg ie 1V.. this seems to look good on paper, to have a reciprocal 
response at the op amp output.. havent tried it out in a cct yet , but maybe 
some stabilizing cap in op amp feedback loop needed .. been a while, I'll 
have a look for the bit of paper it's around here somewhere..
Cheers,
Dan
>
>I am just experimenting a little with chaotic lonlinear equantions
>in order to buit a "Chaotic LFO". I programmed some equations with
>self built analog-computer-circuits, and there are no problems
>with :
>substraktion, addition, multiplication, integration and
>differentiation.
>But I need for some special equations  Y/X !!
>I don't have ANY idea how to manage Z=Y/X.
>I tried it with 2 log converters for Y and Z and subtraction and
>then exp of the result, but it doesnt work really good.
>
>Is anyone , who knows how to design this better ? Perhaps a chip
>like the MC1496 for multiplication ?
>
>This would be VERY VERY helpful !
>
>Thanks, J.S.
>
>--
>Sent through GMX FreeMail - http://www.gmx.net
>

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