1/X circuit

[Rene Schmitz]

At 22:09 25.01.00 -0000, Tony Allgood wrote:
>Hi all,
>
>I'm looking for a circuit design that has a 1/x output where x is a
>voltage input. A bit like a expo convertor, but not quite. Any ideas?
>I'm stumped.

Hi Tony and all!

Logarithmic V/V convertor, invertor, expo V/V convertor.
Since exp(-log(x)) = 1/x. It will work only for positive input. 
I think it won't need a tempco resistor, since the log tempco cancels the
exps tempco.

Bye
 René


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