or I will try to double the length of the wires and see on the scope
screen how the spike changed (I should expect it to become twice as
wide).


At 17.33 2011.12.15, you wrote:
>I agree with your basic point, Dave, but there is a distinction
>between a finite lumped-element model and a real transmission-line
>model. The former has no true delay since it has a finite number of
>poles whereas the latter has a true delay. I think it is likely in
>this case that Mario could determine which kind of effect he is seeing
>by looking at the timing of the voltage overshoot versus the rising
>edge to see if it corresponds to the expected propagation delay. Also,
>if he arranges the wires in a well-defined rectangular loop, then he
>could use an inductance formula to estimate the inductance of the
>wires and construct a physically-small lumped-element circuit which
>provides the same inductance and the same capacitance and see if he
>gets the same effect.
>
>Sean
>
>
>On Thu, Dec 15, 2011 at 10:12 AM, Dave Tweed <pic@dtweed.com> wrote:
>> Short answer: Yes.
>>
>> Longer answer: A transmission line is simply a pair of conductors with
>> distributed inductance and capacitance, so in the end, you really have t=
o
>> consider the lumped effects and the distributed effects together.
>>
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