Re: [SI-LIST] : Guard band for differential signals

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From: ajmani@us.ibm.com
Date: Thu Jul 27 2000 - 08:25:42 PDT


Ravi,

If the differential lines carry low amplitude signals, it will be
beneficial to use a guard band around them. However, presence of guard
band will cause a reduction in the characteristic impedance of differential
lines. It will be advisable to use a 2-D field solver to determine the
quantitative effect of impedance change due to guard band.

Regards, Ravinder
PCB Development and Design Department
IBM Corporation - Storage Systems Division
Email: ajmani@us.ibm.com
***************************************************************************
Always do right. This will gratify some people and astonish the rest.
.... Mark Twain

Ravi Kiran <rkiran@iprg.nokia.com>@silab.eng.sun.com on 07/26/2000 05:23:39
PM

Please respond to Ravi Kiran <rkiran@iprg.nokia.com>

Sent by: owner-si-list@silab.eng.sun.com

To: si-list@silab.eng.sun.com
cc:
Subject: [SI-LIST] : Guard band for differential signals

Hi,

Is it advisable to provide ground guard band for differential signals?
What will be the effect of guard band for differential signals?

Thanks
Ravi Kiran 1-650-625-2225
Member Technical staff
Nokia IP Routing Group
313 Fairchild Drive
Mountain View, CA 94043

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