Re: [SI-LIST] : differential impedance calculations

About this list Date view Thread view Subject view Author view

From: Charles Grasso ([email protected])
Date: Wed Nov 01 2000 - 14:22:51 PST

Hello - There is an excellent presentation available for download called
"Differential Impedance finally made Simple" authored by Dr Bogatin that
should help answer this question.

Please goto Click on Last Meeting and
follow the instructions for the presentation download.


Charles Grasso
Ansoft Corporartion
p: 303-666-1400
f: 303-666-1499
----- Original Message -----
From: "Gary Peterson" <[email protected]>
To: <[email protected]>
Sent: Wednesday, November 01, 2000 12:50 PM
Subject: [SI-LIST] : differential impedance calculations

> I seem to recall Dr. Howard Johnson mentioning that impedance calculation
> formulas made assumptions (since closed-form solutions aren't possible).
> Can someone comment on assumptions made for the equation for differential
> impedance shown below? Seems to me that as traces get closer together,
> single ended impedance would be affected. When I calculate single-point
> values for differential impedance using Hyperlynx LineSim, I do see the
> single-ended impedance change when the spacing between the pair gets
> Thanks,
> Gary Peterson
> (Embedded image moved to file: pic27894.pcx)

**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected] In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at

About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:29:57 PDT