[SI-LIST] High speed signal-return path

  • From: "Raja Anand" <raja.anand@xxxxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Sat, 22 Sep 2007 11:12:19 +0530

Hi All,
 For high speed differential signals (3.125Gbps ), is it really required to
take these signals between Gnd Planes.  Which option should I go for from
below if my stack up is symmetrical?

 Option1:
L4 - Power
L5 - Signal
L6 ? GND

 Option2:
L4 - GND
L5 - Signal
L6 ? GND

Regards,
Raja

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