[SI-LIST] Re: Crosstalk
- From: "Jim Antonellis" <janton@xxxxxxxxxxxxx>
- To: <mrepala@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Fri, 22 Apr 2005 08:45:34 -0400
Murali,
I will provide some general insight below, but I must strongly
encourage you to at least a google web search to start reading
some materials, or even better, if you will be staying in si,
purchase a book or two (the si-list archives are full of
recommendations).
In short, the crosstalk induced on a victim net, by any number
of aggressor nets will be the mutual capacitance and mutual
inductance between the victim and the aggressors, as well as
the e-field and i-field strengths. (other things like source
and dest impedance makes a diference, as well as stackup in
the vertical direction).
A quick insight would be to visualize one etch, in cross section,
traveling into yor computer screen. Now draw several concentric
circles eminating outward from the etch (all circles are centered
at the etch). If a second etch, parallel to the first etch, is
in anny of the concentric circles the second etch (victim) will
be effected by what signaling fields are on the first (aggressor)
etch. The inner fields are stronger than the outer fields and in
general you will see an inverse proportion to distance ^2.
NOTE: I have taken many liberties and made many oversimplifications
in the above description, please read some material on the topic.
Jim
-
Jim Antonellis janton@xxxxxxxxxxxxx
Sandburst Corp www.sandburst.com
Office: 978.689.1669
Cell: 978.618.4745
This message and any attachments are Confidential and may be Legally
Privileged. It is intended solely for the addressee. If you are not
the intended recipient, please delete this message from your system
and notify us immediately. Any dis-closure, copying, distribution or
action taken or omitted to be taken by an unintended recipient in
reliance on this message is prohibited and may be unlawful.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Murali Mohan Repala
(mrepala)
Sent: Friday, April 22, 2005 5:58 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Crosstalk
Hi all
I am beginner to SI analysis. I am using SpectraQuest to check cross-talk.
My Question is something like this:
Say we have 4 data lines D0,D1,D2 and D3 going from chips U1 to U2.
The trace length of all the four data lines are different and distance
between each line is less than 4 MIL.
Now these lines switch from 0000 to 0010 [D3D2D1D0].
My question is will D1 effects D0 and D2. Can anybody please help me out to
understand the concept of cross talk.
Also i am new to specctraquest.Can any one tell me the setup in SQ to
perfrom cross talk.I am confused with the help provided by SQ.
Thanks and regards
Murali mohan Repala
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
