[SI-LIST] Re: 50 Ohm Via?

Hello...Joel,

3D field solver is good, and 1~5Gbps had better condiser the Via effect,

detail should see your topology configuration.

BR,
Joseph =20

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Joel Brown
Sent: Thursday, January 10, 2008 9:52 AM
To: 'SI LIST'
Subject: [SI-LIST] 50 Ohm Via?

Is there such a thing as a design methodology for designing a PCB via
with 50 ohm impedance, or does it have to be done iteratively using a 3D
field solver?
Are controlled impedance vias necessary, worthwhile or helpful for
multi-gigabit serial links running at 1 to 5 Gbps?

=20

Thanks - Joel

=20



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 =20

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