[sdiy] DCO Question

[Gordonjcp]

On Mon, Nov 06, 2017 at 04:43:17PM +0100, Mattias Rickardsson wrote:
> On 6 November 2017 at 14:26, Guy McCusker <guy.mccusker at gmail.com> wrote:
> 
> > >> Well, it also hasn't got partials extending off to infinity, otherwise
> > >> you'd need an infinitely powerful power supply ;-)
> > >
> > > Why? Infinite series often have finite sums.
> >
> > Of course, but gjcp was not talking about any old series, but the
> > sawtooth specifically.
> >
> 
> I'd say an analog sawtooth *has* got partials extending off to infinity
> (why would they suddenly come to an end?), but in a more decaying rate than
> a perfect sawtooth - resulting in a sum that is finite.

Because your circuit hasn't got infinite bandwidth.  You won't find much
breaking the noise floor above a few hundred kHz.

-- 
Gordonjcp