Re: [SI-LIST] : High Speed Queries

Syed Huq (shuq@cisco.com)
Fri, 6 Nov 1998 15:35:05 -0800 (PST)

You may also want to add this to your library:

"Computer Circuits Electrical Design" by Ron K. Poon ISBN 0-13-213471-3

Excellent topics on SPICE, Transmission lines, Crosstalk, SSO and more.

Regards,
Syed
Cisco Systems,Inc

>
> I strongly recommend the book on "Digital Systems Engineering" by
> Dally and Poulton.
>
> http://www.cup.org/books/dally/dally.html
>
>
> Disclaimer: my financial compensation from this book was limited to a couple
> of free copies.
>
>
> Regards,
>
> Fred
>
> > From owner-si-list@silab.Eng.Sun.COM Fri Nov 6 14:47 CST 1998
> > From: PRASAD_VENUGOPAL@HP-SanJose-om1.om.hp.com
> > X-OpenMail-Hops: 1
> > Date: Fri, 6 Nov 1998 12:23:10 -0800
> > Subject: Re: [SI-LIST] : High Speed Queries
> > MIME-Version: 1.0
> > TO: portman@bitmicro.com
> > CC: lweemei@dso.org.sg, si-list@silab.Eng.Sun.COM
> > Content-Disposition: inline; filename="Re:"
> > Content-Transfer-Encoding: 7bit
> >
> > Hi,
> >
> > I also recommend the folowing web site:
> >
> >
> > http://www.ultracad.com/articles.htm
> >
> > ______________________________ Reply Separator
_________________________________
> > Subject: Re: [SI-LIST] : High Speed Queries
> > Author: Non-HP-portman (portman@bitmicro.com) at HP-Boise,mimegw4
> > Date: 11/6/98 10:20 AM
> >
> >
> > Lum Wee Mei,
> >
> > Signal Integrity and PCB layout is not easy is different for each and every
> > application, but it can be learned.
> >
> >
> > The first thing to do purchase a copy of
> >
> > High-Speed Digital Design : A Handbook Of Black Magic
> > By Johnson, Howard W. / Graham, Martin
> > http://www1.clbooks.com/asp/bookinfo/bookinfo.asp?theisbn=0133957241
> >
> > CONTENT HIGHLIGHTS:
> >
> > Covers signal reflection, crosstalk, and noise problems that occur in
> > high-speed digital machines (about 10 megahertz).
> >
> > Includes checklists that ask the questions an experienced designer would ask
> > about a new system.
> >
> > Offers useful formulas for inductance, capacitance, resistance, rise time,
and
> > Q.
> >
> > Explains the trade-offs between signal crosstalk, mechanical fabrication of
> > tolerances, and trace routing density.
> >
> > Presents a methodology for determining how many layers will be required to
> > route a printed circuit board.
> >
> >
================================================================================
> > ======
> >
> > The second thing to do is sit down for a couple undisturbed days and read it
> > very carefully.
> > Then read it again.
> >
================================================================================
> > ======
> >
> > Thirdly log onto Howard's web page www.sigcon.com - read, read, read.
> >
================================================================================
> > ======
> >
> > Fourthly, purchase a copy of the following book and read it thoroughly as
> > well.
> >
> > EMC and the Printed Circuit Board: Design, Theory, and Layout Made Simple by
> > Mark Montrose
> >
> > Contents : EMC Fundamentals; EMC Inside The PCB; Components
> > and EMC; Image Planes; Bypassing and Decoupling;
> > Transmission Lines; Signal Integrity and
> > Crosstalk; Trace Termination; Grounding
> > Copyright : 1999
> > Format : Hardcover
> > Pages : 320pp
> > List Price US$ : $69.99
> > IEEE Member Price US$: $56.00
> > IEEE Product No. : PC5756-QAJ
> > ISBN : 0-7803-4703-X
> > http://www.ieee.org/products/ordinfo.html
> >
================================================================================
> > ======
> >
> > After all this reading, you can probably answer a lot of your own questions.
> > But remember, there
> > is not just one solution and it is not an easy subject matter. It takes
> > knowledge, experience and
> > some guesswork.
> >
> > Finally, may I suggest you get a Signal Integrity (SI) tool. There are
> > several like Viewlogic's XTK
> > and Mentor's IS. The one I like is Hyperlynx. (www.hyperlynx.com) Mainly
> > because it is very easy to use,
> > secondly because you don't have to sell your first born son to get it. It
may
> > not be as accurate
> > as the previous two, but I don't have to hire a guru to run it.
> >
> > LineSim is a good first cut - but you have to lay out the signal topology
> > yourself one at a time.
> > It is ok for scratch pad work and pre-planning.
> > BoardSim lays out all the signals at once by reading in your actual board
> > layout from your CAD tool.
> > BoardSim willl let you approximate things with the generic models it
provides,
> > but you WILL have to
> > learn what IBIS models are before you can really make use of BoardSim.
> > http://www.eia.org/eig/ibis/ibis.htm
> >
> > Download the demo and take a look.
> >
> > Like I said, SI and PCB layout is not easy, but with some reading and
> > experience you can get along
> > just fine.
> >
> >
> > Good Luck,
> >
> >
> > Roland
> >
> >
> > Lum Wee Mei wrote:
> > >
> > > Hi, Todd and the rest in this mailing list:
> > >
> > > I am a "new kid in town" and is task to look into the high-speed design
area.
> > I understand this is not an easy topics and I hope to get some expert
guidances
> > from all of you. I have to come out with design rules so as that designs
> > > require such area can refer to. Have someone draft a set of high speed
design
> > rules that can share with me?
> > >
> > > I have the following queries that that some of you might able to help me.
They
> > are:
> > >
> > > 1. How you identify high speed signal? By its rise time or by its
operation?
> > > 2. Someone told me that all high speed signals have to be impedance
controlled
> > . Is this correct? If not, what signals should be impedance controlled.
> > > 3. I come across a so-called high-speed board which has many vias being
punche
> > d on its fill (for both ground and power) along side the pads for inductors
and
> > capacitors. They are also found on very thick ground traces. What are
> > > the purposes of such vias? Did they play a role in high speed?
> > >
> > > I look forward to your reply.
> > > Thanks and regards.
> > >
> > > **** To unsubscribe from si-list: send e-mail to
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> >
> > --
> > Roland F. Portman
> > BiT Microsystems, Inc.
> > 48499 Milmont Drive
> > Fremont, CA 94538
> >
> > (510) 623-2341 Ext 129
> > (510) 623-2342 Fax
> >
> > portman@bitmicro.com
> > http://www.bitmicro.com
> >
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