"Allen Windhorn" wrote:

One way to look at it is to consider the harmonics produced by all the
rising edges, and spearately consider the harmonics produced by the
falling edges. Both contain all of the harmonics, but since they are
displaced in phase, some of them get cancelled.

Obvious example: a square wave contains only odd harmonics.
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Would that not require the components of rising edges to be time-coincident
with a trailing edges? How could that occur when the these transitions
occur at different times?

RF

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