[sdiy] Temperature stable lin-exp converter with a CA3086 or CA3046

[Tim Ressel]

I must disagree:

--- Ian Fritz <ijfritz at earthlink.net> wrote:
> A standard tempco resistor (with resistance
> proportional to absolute 
> temerature over the operating range) will in fact
> give *exact* compensation 
> (cancels the 1/kT factor in the exponent). The idea
> that compensation is 
> correct at one temperature only is a common
> misconception, unfortunately 
> promulgated by some people who should know better. 

I quote from Chamberlin:

"Note that the compensation is exact only at 27C
because the exponential converter temperature goes as
1/T rather than as KT, which the resistor provides."

This was the line that convinced me to go with AN299.
I don't go against Hal Chamberlin, no matter how much
its been discussed here.

--TR

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