[SI-LIST] Re: Middle (Star) Termination
- From: "Newton, Scott" <Scott.Newton@xxxxxxxxxxxxxxxx>
- To: "Venkataraman, Srinivas" <srinivas.venkataraman@xxxxxx>,<rhaller@xxxxxxxxxx>
- Date: Wed, 25 Feb 2004 13:44:10 -0500
Srinivas,
Thanks for the reply.
The link didn't work (for me anyway). But I did go to the US Patent site =
and found the patent by searching on his last name. For anyone =
interested, it's patent # 6,366,972.
I'd really like to see John Grebenkemper's article "Network Topology =
Analysis Using the Reflection Coefficient" if anyone has a link...
Thanks!
Scott
-----Original Message-----
From: Venkataraman, Srinivas [mailto:srinivas.venkataraman@xxxxxx]
Sent: Wednesday, February 25, 2004 1:16 PM
To: rhaller@xxxxxxxxxx; Newton, Scott
Cc: si list; Grebenkemper, John
Subject: RE: [SI-LIST] Re: Middle (Star) Termination
Link to John Grebenkemper's patent document on star termination
attached.
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=3DPTO2&Sect2=3DHITOFF&p=3D=
1&u=3D
/netahtml/search-bool.html&r=3D1&f=3DG&l=3D50&co1=3DAND&d=3Dptxt&s1=3Dgre=
benkemper.I
NZZ.&OS=3DIN/grebenkemper&RS=3DIN/grebenkemper
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Robert Haller
Sent: Wednesday, February 25, 2004 9:54 AM
To: Scott.Newton@xxxxxxxxxxxxxxxx
Cc: si list
Subject: [SI-LIST] Re: Middle (Star) Termination
Scott,
John Grebenkemper wrote an excellent paper that is available in
the
Designcon98 precedings "Network Topology Analysis Using The Reflection
Coefficient" that does and excellent job of not only explaining the
theory of middle termination but also presents the math.
Regards
Bob
Newton, Scott wrote:
> Can anyone please provide a brief explanation regarding the theory of
> a middle termination scheme? In the book" High Speed Digital Design"
> by Johnson&Graham the topic seems to be glossed over. It essentially
says that providing resistors connected in the middle of a star network
that have impedance of 1/3 Zo work by halving the voltage at the node.
I've used Hyperlynx to simulate this arrangement and it works well. I've
searched the web and haven't found a satisfactory explanation.
>=20
> Thanks in advance.
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--
Robert J. Haller (rhaller@xxxxxxxxxx)
Principal Consultant
Signal Integrity Software Inc.
6 Clock Tower Place, Suite 250
Maynard, MA 01754
Phone: (978) 461-0449, ext 15
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