[sdiy] Discrete OTA

[Ian Fritz]

At 04:24 PM 4/9/2014, Neil Johnson wrote:
>Ian,
>
> > The version I have in my cab tracks to better than 0.1% from 100 Hz to 30
> > kHz.  I usually don't look at lower frequencies, because errors there yield
> > slow beats, but I'm pretty sure it would go at least a couple of  octaves
> > lower.
>
>That's impressive ... better than 1.2 cents, well below the 5 or 6
>cents that is considered the minimum accuracy.  How well does it cope
>with changes in temperature?

That is the point of the dial-a-tempco article.  Drift -- both scale factor 
and tuning -- are down around 20 ppm/K.  Can't easily measure better than 
this.

Ian