[Noisebridge-discuss] Hot off the IEEE press

[Christie Dudley]

Crosstalk on copper is not something to be easily dismissed.  Those
who study electromagnetics understand that the higher the frequency,
the shorter the trace before you have a really good antenna.  By using
light for your signalling, you can manage a much higher clock speed on
your boards, realistically and potentially significantly increasing
the speed you're able to run.

Christie
_______
"Would you rather be a lion in captivity and live 24 years, or in the
wild and live 10-14 years? Answer the question every morning then look
at your condition." -- Nassim N Taleb



On Thu, Sep 9, 2010 at 7:16 PM, Charles Collicutt
<charles at collicutt.co.uk> wrote:
> On Thu, Sep 09, 2010 at 06:15:54PM -0700, Glen Jarvis wrote:
>> I guess it really does depend upon transmit time of photon vs. electron in
>> such a short space...
>
> Electrons move relatively slowly in copper, on the order of millimetres per
> second, but that doesn't matter. Voltage changes (and hence electronic
> signals) are caused by the propagation of an electromagnetic field, which
> happens at about the speed of light.
>
> --
> Charles
>
> "The dinosaurs became extinct because they didn't have a space program.
>  And if we become extinct because we don't have a space program, it'll
>  serve us right!"
>         -- Larry Niven, quoted by Arthur C. Clarke in 2001
>
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