[sdiy] New Thomas Henry VCO-1 Page Up

[Paul Perry]

Maybe it is time for a comnpletely different approach to an oct/v
oscillator.
Back in the day, when one wanted to make a non-linear analog function, one
sometimes worked by getting a fiorst approximation & then applying error
correction terms.
Now I'm wondering whether it would be useful to make an ultra simple oct/v
oscillator - with no corrections at all - and then look at the error
function (which would be temperature and frequency sensitive) and try to put
together a simple approximation to the error function.
Which you would add to the input.

Yes, it is more elegant to do it the traditional way. But, who knows? Maybe
a new approach would pay off, at least in the sense of not needing exotic
parts.

Personally, I would like to see an analog VCO with a microprocessor core,
using an A/D and a D/A converter to generate the exponential. Via lookup or
approximation. 

Paul perry Melbourne Australia