Re: [SI-LIST] : even-odd mode influence

Adrian Shiner (adrian.shiner@virgin.net)
Thu, 15 Jul 1999 20:27:48 +0100

You are right, but the real world is that you get both in some proportion no matter how you think you have designed in one mode. Can't answer on the tools.

PCB scale, box scale, system scale, the fundamentls remain the same. The engineering changes a bit. It strikes me that some younger guys out there are relying on their college education & software tools too much. Get reading and
talking to the guys with grey and thin(ning hair)! Experience counts and pride in one's education comes before a fall (to distort a well known phrase or saying!).

Best wishes

Adrian

Douglas McKean wrote:

> At 05:57 PM 7/15/99 +0800, Weber Chuang wrote:
> >Hi si-gurus,
> >
> > I have a question that I would appreciate if I can have your comments,
> >what the syndrome is if the system is impacted by even-odd mode
> >interconnection effect, and are there tools that could accurately simulate
> >the even - odd mode effect?
>
> My understanding is:
>
> Even mode impedance gives common mode noise.
> Odd mode impedance gives differential mode noise.
>
> I'll stand corrected on this ...
>
> Regards, Doug McKean
>
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