[SI-LIST] Re: SI software question
- From: Craig Emmerich <cemmerich@xxxxxxxxxxxxx>
- To: "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 13 Aug 2003 07:49:43 -0500
Hello,
Here is a source for general signal integrity topics. Wavecrest is the
leader in signal integrity measurement and has been dealing with the topic
for over 15 years.
http://www.wavecrest.com/
http://www.wavecrest.com/technical/jitterfund.htm
Thanks,
Craig
-----Original Message-----
From: Robison Michael R CNIN [mailto:Robison_M@xxxxxxxxxxxxxx]
Sent: Tuesday, August 12, 2003 9:12 AM
To: 'si-list@xxxxxxxxxxxxx'
Cc: Jones Robert E Jr CNIN; Young Charles E CNIN; Upton Charles R CNIN
Subject: [SI-LIST] SI software question
My background first:
I'm a rookie at signal integrity. I've got a marginal understanding
of some of the most trivial concepts, such as impedance balancing,
crosstalk, etc. I've done the Lee Ritchie two-day course at the PCB
West, and I've spent some time with Johnson's High-Speed Digital
Design, and I've even managed to design a predominantly ECL PCB run-
ning at the modest speed of 576MHz.
We have been reproducing old boards for legacy military systems using
hard copy artwork with a minimum of engineering, but there are other
boards that have obsolescence issues with parts. These boards need
to be redesigned, and we will probably use CPLD and FPGA to replace
a lot of the old digital. This drops the ugly issue of signal
integrity onto our plate.
Here are my questions:
1. Do the list rules bar discussion of specific software solutions?
2. If software discussion is OK, I would mention that we are getting
a few low-level Cadence board layout packages and one full-blown,
high-level package with SpectraQuest. Is Cadence the best place to
get training on SpectraQuest?
3. Where is a good place to get generic, hands-on SI training?
4. You have been talking about decoupling caps, but to my knowledge
SpectraQuest does not address that area. Is that correct? It appears
to me that power and ground is assumed to be ideal, and that there
must be some other packages to calculate power and ground issues.
5. I have seen power and ground problems for 17 years. What software
is good for simulating these problems and solving them? I've heard
the term "field-solvers" used in reference to this.
6. Here's what might be a strange question: Is there a template
PCB layout out there that is useful in demonstrating signal integrity
issues and bouncing real-world measurements against an easily calculated
ideal? Does that even make sense?
Although it is probably apparent from the above, I might note that we
are NOT looking to contract out signal integrity. We have the time to
come up to speed, and we intend to do just that.
Thank you, Michael Robison
812-854-4953
Crane Naval Surface Warfare Center
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