[SI-LIST] Re: IEEE EMC talk Oct 9 in Santa Clara

Well, he does say the four *most* confusing principles, implying there 
are more.
I feel a discussion comin' on. What would people here tell the IEEE EMC 
gang in Santa Clara are the four *most* confusing principles in SI?

I would think this would be relative to who is being confused - are we 
talking old SI hands, or newbies just getting their feet wet?
Off the top of my head, for folks from outside the field, my suggestions 
would be:

characteristic impedance
   - this took a lecture by Lee Ritchey, speaking slowly in one-or-two 
syllable words, for me to get
Return paths, and impedance control
   - I'm frequently looking at issues around these, explaining and 
correcting them
Simulations do not necessarily reflect reality
   - we know that around here, but somehow people seem willing to accept 
simulations over real, carefully obtained traces.
Mounting inductance of passive components, inc decoupling caps and DC blocks
   - when talking about this and I don't have paper to draw on, I always 
end up using my hands a lot more.
Ground is not always ground

Within the field we have much more subtle things to confuse us. :-P

Alan


Grasso, Charles wrote:

>What!! Only four??=20
>
>-----Original Message-----
>From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
>On Behalf Of Eric Bogatin
>Sent: Friday, September 28, 2007 8:22 AM
>To: si-list@xxxxxxxxxxxxx
>Cc: eric@xxxxxxxxxxxxxxx
>Subject: [SI-LIST] IEEE EMC talk Oct 9 in Santa Clara
>
>Hi folks-
>
>
>For those of you planning to be in the Santa Clara area on Tues Oct 9,
>you
>might like to visit the Santa Clara Valley Chapter of the IEEE EMC
>Society,
>where I will be giving a talk, "The four most confusing principles in
>Signal
>Integrity and how not to be confused."
>
>  
>

-- 
Alan Hilton-Nickel
Signal Integrity Engineer
Sun Microsystems Inc.
Netra Systems and Networking
Santa Clara, CA



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