[sdiy] Multiplexed Expo Converter?

[Dave Manley]

Paul Perry wrote:
> ----- 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.

To be clear, when you say "audio rates", do you mean audio rate modulation?

-D