[sdiy] Temperature Compensated Exponential Converter Using SSM2164

[Ian Fritz]

At 01:16 PM 8/30/2009, David G. Dixon wrote:

>In any case, the maximum relative errors I'm getting with the 2164 analysis
>are in the neighborhood of 0.2%, and significantly less if one uses the
>"proper" values of tempco trim and feedback resistance, and doesn't stray
>too far from the reference temperature, particularly if one errs on the
>warmer side (cooler temps give more error).  Hence, I think, with a little
>care, this expo can be adjusted to give very slow beat frequencies
>everywhere in the audio spectrum.

That's good, 0.2%, especially using an OTA approach.

Ian