[SI-LIST] Re: symmetry vs length matching for diff signals
- From: "Cortex Chen" <Cortex.Chen@xxxxxxxxxxxx>
- To: "ariazi" <ariazi@xxxxxxxxxxxxxxx>
- Date: Wed, 1 Dec 2004 09:22:30 +0800
Dear Abe,
Good morning (Taiwan Time).
Is your article/book released in Asia?
When?
Could you share me the some key sections (soft-copy) right now?
Let me study it......
Thanks for your expertise.
Best regards,
Cortex=20
=20
Also see my article, "Differential Signals Routing Requirements, Part =
II",
Printed Circuit Design & Manufacture, March 2004, P.20=20
-----Original Message-----
From: ariazi [mailto:ariazi@xxxxxxxxxxxxxxx]
Sent: Wednesday, December 01, 2004 3:02 AM
To: Cortex Chen
Cc: si-list@xxxxxxxxxxxxx
Subject: RE: [SI-LIST] Re: symmetry vs length matching for diff signals
Dear Cortex,
Your question is a good one!!
Actually, I have devoted lots of thought and research to this subject. =
It
seems to me
that there is no universal definition or a mathematical formula for
distinguishing=20
loosely vs. tightly coupled.
However, you may find the following qualitative definition helpful:
When the separation of the two traces is relatively large, so that the
coupling of each line
to the reference planes exceeds the mutual coupling of traces, then the =
pair
is said to be
"loosely coupled". When the two traces are sufficiently close, so that =
the
lines are coupled=20
more strongly to each other than to the reference planes, then they are
referred to as "tightly
Coupled".
Also see my article, "Differential Signals Routing Requirements, Part =
II",
Printed Circuit Design & Manufacture, March 2004, P.20 (the paper is
available on line).
=20
Best Regards,
Abe=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On
Behalf Of Cortex Chen
Sent: Tuesday, November 30, 2004 3:31 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: symmetry vs length matching for diff signals
Dear Abe Riazi,
How to determine the tightly and loosely coupled pairs?
Regards,
Cortex
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=20
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