[Re: thermal tips re expo converters:]

[Martin Czech]

> Another approach would be to use "proportional plus integral" control,
> where the integral of the error signal is also fed back, in order to
> eliminate the equilibrium error signal. 

I would even try a PID, proportional, integral, differntial.
Also one opamp only.

> 
> If the arguments about not needing a fast cooling rate were true,
> designers would not be heating their chips to the 60-80 deg C range.
> This is way, way above any ambient temperature that would ever be
> encountered, and the higher temperature clearly must degrade the
> converter performance.
> 

And also self heating of the npn pair in higher octaves.


m.c.