[SI-LIST] Re: Variations in TDR from Via Tuning
- From: "Peterson, James F (FL51)" <james.f.peterson@xxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 8 Jun 2005 11:55:13 -0700
Jim Antonellis -
This is a guess, but I think you might have some luck if you check into
Teradyne.
I have seen a table in Howard Johnson's new book that seems related to your
picture that was from Teradyne (Table 5.9). It is referenced in his book as;
Teradyne, "Design Considerations for Gigabit Backplane Systems".
regards,
Jim Peterson
Honeywell
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Ray Anderson
Sent: Wednesday, June 08, 2005 2:09 PM
To: si-list@xxxxxxxxxxxxx
Cc: janton@xxxxxxxxxxxxx; Ray Anderson
Subject: [SI-LIST] Re: Variations in TDR from Via Tuning
The image Jim is inquiring about can be seen at the following URL:=20
http://si-list.org/files/tech_files/Via-Tuning.jpg
-Ray
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Jim Antonellis
Sent: Wednesday, June 08, 2005 8:31 AM
To: Si-List
Subject: [SI-LIST] Variations in TDR from Via Tuning
Hello,
I have a jpeg image showing the difference in TDR profiles between a
standard through hole via, pads removed, backdrilled and pad/antipad tuning.
A small color diagram showing the PCB and via cross sections is also in the
figure.
I consider it qualitative and not absolutely quantitative=20 (regardless of
axis units being present) given that more of the analysis details are
missing; none-the-less, it is a very good visual to convey the overall
theme.
I would like to use this image and as such I am trying to locate the source
but my attempts to do so via (no pun intended) google have been in vain.
Does anyone recognize, from my desription, this jpeg image, and most
importantly know of it's=20 source?
I will upload the jpeg to the download area as soon as I figure out how to
do so (feel free to send me the instructions as I did not see them on the
page http://www.si-list.org)
Regards,
Jim
-
Jim Antonellis janton@xxxxxxxxxxxxx
Sandburst Corp www.sandburst.com
Office: 978.689.1669=20
Cell: 978.618.4745
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