[sdiy] VCO reset time

[JH.]

>    > 4. A Pulse-Width Modulated output based on triangle does not have
>    > the phase- modulation that a sawtooth based variant has. This may
>    > or may not be a good thing depending on what you are after.
>
> True.

Well, it has much _less_ than the saw version at least.
I did the maths for this some years ago, and was surprised that even with
triangle
based PWM there are some sidebands produced.
I only was partially surprised, because tri based PWM still _sounds_ like
having some angle modulation components; it's just surprising when you look
at the modulated waveform and see that its symmetry is is never changed.
I would have to dig this up, but I'm sure Magnus you are faster developing
the formula
yourself than me finding the old calculations. If memory serves, the
fundamental
of a tri based pwm has no angle modulation component, but the higher
harmonics
still do.

JH.