"Iain Duncan" <iainduncan(a)telus.net> writes:
Thanks for the all the interesting responses. I did
some thinking and a few
experiments, and I think the best way to do it would be to use an amplitude
modulated sine ( actually triangle ) wave at one have the nyquist, precisely
1/4 of sample rate.
Why modulate at all?
You can represent the voltages directly or proportionally.
Note that making everything a function of the Nyquist frequency causes
a shift when running at different sample rates.
--
joq