Re: [SI-LIST] : Speed of electron & Speed of signal on the trace

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From: Mike Hughes (mike.hughes@analog.com)
Date: Thu Mar 15 2001 - 05:34:44 PST


Selva,

An analogy that I like is ripple on water. If you throw a rock into a calm pond,
the waves travel outward quickly but the water only moves up and down. If you
did the same thing in a thin canal, the waves would move out in between the
canal walls because that is the path with the least impedance.

jan.vercammen.jv1@belgium.agfa.com wrote:
>
>
> I have a nice analogy (thanks to prof. Catrysse of the KHBO Oostende). The
> electromagnetic fields are like sound, the transmission line
> is like a pipe in which the sound waves travel. The currents are like vibrations
> of the pipe wall. The sound waves travel in the pipe and
> make the pipe wall jiggle as they pass.
>
> Hope this helps.
>
> Regards,
>
> Jan Vercammen
> Agfa-Gevaert NV
>

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