[SI-LIST] Re: Guard traces for differential pairs
- From: "Grasso, Charles" <Charles.Grasso@xxxxxxxxxxxx>
- To: 'Chris Cheng ' <chris.cheng@xxxxxxxxxxxx>,"''duanet@xxxxxxxxxxxxxxxxxxxxxx' '" <duanet@xxxxxxxxxxxxxxxxxxxxxx>,"'si-list@xxxxxxxxxxxxx '" <si-list@xxxxxxxxxxxxx>
- Date: Mon, 29 Sep 2003 20:15:02 -0600
The seperation between inductive and capacitive crosstalk has been
analysed by Dr Howard Johnson in the High Speed Digital Design
Book.
Chas
-----Original Message-----
From: Chris Cheng
To: 'duanet@xxxxxxxxxxxxxxxxxxxxxx'; si-list@xxxxxxxxxxxxx
Sent: 9/29/2003 2:14 PM
Subject: [SI-LIST] Re: Guard traces for differential pairs
I would love to learn how could xtalk be "capacitive" or "inductive"
only.
Are you saying you can have non-zero off diagonal element on one (C or
L)
matrix while the other is zero ?
Chris
-----Original Message-----
From: Duane Takahashi [mailto:duanet@xxxxxxxxxxxxxxxxxxxxxx]
Sent: Monday, September 29, 2003 8:56 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Guard traces for differential pairs
It also depends on the type of crosstalk: electric or magnetic (
capacitive or inductive ). If it's magnetic, guard traces won't help.
If it's capacitive, guards will help but will leave you with the
'magnetic remainder' of the xtalk.
I've seen high impedance lines, more than 60 ohms, exhibit inductive
xtalk. My guess is guard traces would not have helped in this case.
Regards,
Duane
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