[SI-LIST] Re: Errata list for High-Speed Digital System Design: A Handbook of Interconnect Theory and Design Practices

John,

The formula on page 81 of High Speed Digital System Design is correct
(with the 0.03(H/W) in the bottom of the ground resistance equation).
If memory serves, the error in the example on page 89 was corrected in a
later printing, however, I will double check.

-  Steve Hall

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of John Phillips
Sent: Wednesday, February 25, 2004 2:29 AM
To: si list
Subject: [SI-LIST] Errata list for High-Speed Digital System Design: A
Handbook of Interconnect Theory and Design Practices

In the Stephen H. Hall et all book, on page 81 there are some formula=20
for the AC resistance of microstrip derived through conformal mapping,=20
in particular the formula for the ground resistance has terms for W/H on

the top of the division and 0.03H/W on the bottom. However in the=20
example on page 89, the top term has become '1' when W/H=3D0.5 and the=20
bottom term 0.03H/W has become 0.03*0.5 when the term H/W =3D2.

I do not have access to the source document (Foundations for Microwave=20
Engineering, Robert Collins) so I was wondering if anybody can confirm=20
which is the correct formula.

Best Regards


John Phillips
--=20
John Phillips
Signal Integrity Engineer               Sun Microsystems Ltd
Tel:    +44 (0)1252 421120              Sparc House, Guillemont Park
Fax:    +44 (0)1252 421658              Minley Road, Blackwater,
                                         Surrey, GU17 9QC

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