[SI-LIST] Re: Question regarding return current in a differential pair
- From: "Mirmak, Michael" <michael.mirmak@xxxxxxxxx>
- To: <mkotson@xxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 20 Apr 2006 10:01:08 -0700
Mike,
Great question. Here's a hint to an answer, by way of another question
-- how close are the signals in the pair relative to the "reference"
plane?
For the broader list, here's a semi-rhetorical question: when you hear
the word "differential," do you think of "electromagnetic coupling" in
the interconnect or do you think of "complementary logic states" on the
signals? The context of the question makes a huge difference in the
meaning we assign the term.
- Michael Mirmak
Intel Corp.=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Michael Kotson
Sent: Thursday, April 20, 2006 09:47
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Question regarding return current in a differential
pair
Hello Gurus,
I have a question regarding the return current for a high speed
differential signal. I've seen a couple of sources that state that all
of the signal return current is handled by the other half of the
differential pair. It seems more logical to me that there must be some
amount of return current (not just common mode) on the reference
plane(s) as well. What's the truth?
=20
Thanks in advance,
Mike
=20
Michael Kotson
Project Engineer
VT Miltope=20
4900 Pearl East Circle Suite 106
Boulder, CO 80301
(303) 473-0388 x132
http://www.miltope.com <http://www.miltope.com/>=20
=20
=20
************************************************************************
******
CONFIDENTIALITY NOTE: This email and any attachments may be
confidential=20
and protected by legal privilege. If you are not the intended
recipient,=20
be aware that you are hereby notified that any unauthorized review, use,
disclosure, dissemination, distribution, or copying of this
communication,=20
or any of its contents, is strictly prohibited. If you have received
this=20
email in error, please notify us immediately by replying to the sender
and=20
deleting this copy and the reply from your system. Thank you for your
cooperation.
************************************************************************
******
------------------------------------------------------------------
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: =20
//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
=20
------------------------------------------------------------------
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:
