>=20
> > But how a PWM can be AC and DC I just don't get
>=20
> Look at it this way - the PWM has a voltage about which it
> swings, IOW it is either side of 2.5V. As you decrease the
> amplitude of the PWM the DC offset becomes apparent.
> This is true of any waveform. It's something that has to be
> considered when using opamps for example
>=20
>=20

That I can see. The middle-point of the wave is just adjusted. =20

But you say, "As you decrease the amplitude of the PWM...";  what do you =
mean by that?  The amplitude is the voltage, correct?  Or is it the =
average voltage? (Like what I would see on a multimeter if I changed the =
duty cycle from 0 to 100%).

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=20

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