[SI-LIST] Re: gigabit ethernet trace length
- From: "Andrew Ingraham" <a.ingraham@xxxxxxxx>
- To: "SI-LIST" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 2 Jun 2006 11:47:13 -0400
Could it be that they want to minimize discontinuities in the common-mode
impedance?
> In a 1000BaseT Ethernet circuit, I would like to extend the distance
> between the magnetics and the RJ-45 connector to about 6 to 8 inches
> (including good SI practice : ref planes, controlled Z, matched lengths,
> etc.). Everything I read says that you can't do that, that it must be
> less than an inch, but I don't understand why. Can someone explain?
Regards,
Andy
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