[sdiy] Multiplexed Expo Converter?

[Paul Perry]

----- Original Message ----- 
From: "Dave Manley"
> With a modern DAC, why bother with an expo, just have the DAC output the
> expo-law voltage and drive linear VCOs.  With a built-in frequency
> counter it would be easy to auto-calibrate.

Yes indeed, but last time I looked at this, it wasn't feasible for audio 
rates at a
sufficiently high accuracy. I'd certainly LIKE to do it this way, getting a 
bunch of
exponential sources without any of the ususal temperature compensation etc 
palaver.

paul perry Melbourne Australia.