[SI-LIST] Re: 6 layers stackup
- From: Jory McKinley <jory_mckinley@xxxxxxxxx>
- To: Fernando Yuitiro Mori <mori@xxxxxxxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Wed, 20 Feb 2008 15:40:31 -0800 (PST)
Frenando,
I would be concerned with any high frequency current requirements that are not
meet by the decoupling between PG. Also, look out for return loops that might
be bigger than expected, say for S4. Probably want to route differentials on
the inner layers due to mismatched propagation of diff mode/comm mode on outer
layers. Just a few points to think about,
-Jory
----- Original Message ----
From: Fernando Yuitiro Mori <mori@xxxxxxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Sent: Wednesday, February 20, 2008 3:17:55 PM
Subject: [SI-LIST] 6 layers stackup
Hi,
I normally use S1 S2 G P S3 S4 for the 6 layers stackup. I need the 4 layer
with 60 ohms, so there are some problem if I use S1 G S2 S3 P S4?
Regards,
Fernando Mori
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