[SI-LIST] Re: placement of decoupling caps (again)

UMR did a paper in 1995 that determined location is not important as long
as you don't cut up the power planes.  Others have repeated those same
tests, as have I,  and come up with the same answers.

The proponents of location matters need to do some testing to show that
their position is valid.

Lee

Lee W. Ritchey
Speeding Edge
P. O. Box 2194
Glen Ellen, CA 95442
Phone- 707-568-3983
FAX-    707-568-3504

I just took the energy it took to be angry and wrote some blues.
Count Basie


> [Original Message]
> From: Eric Steimle <steimle@xxxxxxxxxxxxx>
> To: <si-list@xxxxxxxxxxxxx>
> Date: 4/14/2004 1:59:37 PM
> Subject: [SI-LIST] placement of decoupling caps (again)
>
> I know this has been discussed many times before and so far I have:
>  
>
> Read all the Sun papers on the yahoo list
>
> Read through many papers from AVX on decoupling
>
> Spent some time searching through the list archives
>
> And read through many papers suggested in the list archives
>
>  
>
> So far I've come up with a lot of information on how to choose bypass
> caps, how many to use, what kinds, ESL, ESR, but not much on the correct
> placement of these bypass caps in a normal system (normal to me would be
> a processor some ram and maybe some DAAs or other peripherals).  While
> combing through the list archives I've seen some people saying location
> doesn't matter, while others arguing that it does.  So I was hoping that
> some people could suggest some further sources of information about
> decoupling cap placement that would help me make more informed
> decisions.   
>
>  
>
> Thanks in advance
>
> Eric Steimle
>
>  
>
>
>
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