Re: [SI-LIST] : best layer stackup for 2 PWR 4 Signal and 100 Oh

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From: Ray Anderson (raymonda@radium.eng.sun.com)
Date: Mon Jul 31 2000 - 06:23:22 PDT


Matthias-

        My guess is that you didn't receive any replies because
your message was so general in nature. You asked for opinions
about a dense design with high speed issues. Opinions about
what (power distribution, stackup, crosstalk, simulation, radiation,
trace impedances, topologies, etc. .....) ? There are probably hundreds
of aspects which people may be able to comment on.

        So to answer your inquiry, no your question wasn't "too dumb",
just a bit too general perhaps. Off topic? No!

        If you can zero in on what aspects you are interested in perhaps
someone may be able to comment more effectively.

        Also, someone followed up and suggested that you didn't get a
reply because you identified yourself as a beginner in SI. I'd
seriously doubt that detered anyone from replying. You'l find most SI
engineers just love educating others on their favorite topic !

Ray Anderson
Sun Microsystems
si-list administrator

> On 1 Aug 00 at 22:57, Matthias Mansfeld wrote:
>
> > Hello all,
> >
> > I would like to read some opinions about a rather dense design
> > (double side populated) with some high speed issues. Please
> > apologize my beginner's questions, but this is my first design with
> > controlled impedance differential pairs.
> >
> (snap)
>
> Because I did not read any reactions on this mailing list until now
> - was my question too dumb?
> - was it off-topic or in any other way not appropiate?
> - .....?
>
> Just curious,
> regards
> Matthias Mansfeld
> -----------------------------------------------
> Matthias Mansfeld Elektronik
> * Leiterplattenlayout, Bestueckung
> Am Langhoelzl 11, 85540 Haar; Tel.: 089/4620 093-7, Fax: -8
> Internet: http://www.mansfeld-elektronik.de
>
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