[SI-LIST] Impedance confusion
- From: "Lakshmi N. Sundararajan - PTU" <lakshmi.s@xxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Fri, 21 Nov 2008 12:18:27 -0800
Hi Team,
Between these two stackup,
a) SIGTOP-PP(5 mils)-SIGINNER1-PP(22 mils)-SIGBOT
b) SIGTOP-PP(22 mils)-SIGINNER2-PP(5 mils)-SIGBOT
While computing the impedance of the SIGINNER* layer,
it is offset stripline or edge coupled offset stripline.
Would the impedance be different between these two cases?
I ask this because, when board (a) is rotated it becomes
board (b) and hence I do not expect impedance to vary between
these two stackups.
Can anyone please confirm/clarify on this.
Thanks,
-LN
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