[SI-LIST] Re: Two layer board impedance calculation
- From: "Ravinder Ajmani" <ajmani@xxxxxxxxxx>
- To: Goutham.S@xxxxxxxxxx
- Date: Wed, 15 May 2002 11:03:29 -0700
Goutham,
A quick calculation on my field solver shows that any of the following
geometries will give you approximately 100 ohms differential impedance. I
recommend confirming this with TDR measurement on the finished card, since
one can expect large variations in impedance due to absence of a
ground/power plane.
12 mil wide traces with 6 mils trace to trace separation
8 mil wide traces with 5 mils trace to trace separation
Regards, Ravinder
PCB Development and Design Department
IBM Corporation
Email: ajmani@xxxxxxxxxx
***************************************************************************
Always do right. This will gratify some people and astonish the rest.
.... Mark Twain
Goutham.S@smartm.
com To: si-list@xxxxxxxxxxxxx
Sent by: cc:
si-list-bounce@fr Subject: [SI-LIST] Two layer
board impedance calculation
eelists.org
05/15/2002 02:34
AM
Please respond to
Goutham.S
Hi,
I am designing a two layer PCB. There is no continuous plane.
How to calculate differential trace impedance, can any one suggest?
My requirement is 100ohm differential impedance and 63mil board height.
Regards
------------------------------------------------------------------
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 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 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:
