spectrum of PWM

[Haible Juergen]

	>You should be able to model it using Bessel functions.
	>
	>Consider this:
	>
	>You have two sawtooth waveforms which are at exactly the same
	>frequency (SHARP! THE same) which are added together 1:-1. One of
these
	>are phase-modulated in the relation to the other. Now, as we change
	>the phase modulation will the resulting pulse-width change. Now, we
	>can handle this using Bessel functions in the frequency plane.
	>I think scetching something along these lines will make you arive
at
	>an exact solution.
	>
	>Is that sufficient for you?

Excellent. I think that's the solution !

JH.