D
Don Lancaster
- Jan 1, 1970
- 0
Detailed plots at http://tinaja.com/glib/muse90.pdfRich said:The edges.
And, yes, counterintuitive as it might seem, all of the frequency
components are there all of the time - but because of the way they're
added together in phase, everyplace but at the rising and falling
edge, they add up to either +peak or -peak.
Imagine, say, five cars in a weird race:
They each have a different starting line, but they all have the same
finish line. Car A's starting line is at, say, 100 yards; car B's is
at 200 yds, car C at 300 yards, and so on.
Start them simultaneously, with car A going one MPH, car B going 2
MPH, car C going 3 MPH, and so on.
Nothing much happens until they all reach the finish line simultaneously,
where they all come together at the same time - Crash! - that would be
the rising edge of the square wave, where all of the harmonics converge
in phase.
That's one way to visualize it, anyway.
With the sine waves, it's not their speed but their phases that do the
trick; this is also why square waves have such a wide bandwidth.
Hope This Helps!
Rich
also see http://www.tinaja.com/magsn01.asp
--
Many thanks,
Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
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