Scott,

You may also like to look  at the application notes
on the Polar site:

www.polarinstruments.com/support/cits/cits_index.html



Kind regards
Martyn Gaudion
Polar Instruments

T: + 44 1481 253081
F: + 44 1481 252476
M: +44 7710 522748
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www.polarinstruments.com


At 09:52 30/11/01 -0500, you wrote:
>
>From: <mailto:[log in to unmask]>Scott Westheimer
>To: <mailto:[log in to unmask]>Technet
>Sent: Friday, November 30, 2001 9:06 AM
>Subject: Differential impedance
>
>I have a question regarding differential signal pairs and differential
>impedance that I hope someone can help me with. We are designing a 14
>layer board and the finished thickness needs to .062" and we require 100
>ohms. Some of the internal layers we have split planes. Would these be
>considered strip line or microstrips?
>
>Thanks
>
>Scott