Lee, yes, as usual. This is example was created for the Wild River Technology's
XTALK-32 platform https://wildrivertech.com/ - one of their excellent ;
platforms for the analysis to measurement validation. Wild River can provide
additional data on that.
Best regards,
Yuriy
Yuriy Shlepnev, Ph.D.
President, Simberian Inc.
2629 Townsgate Rd., Suite #235, Westlake Village, CA 91361, USA
Office +1-702-876-2882; Fax +1-702-482-7903
Cell +1-206-409-2368; Virtual +1-408-627-7706
Skype: shlepnev
<http://www.simberian.com/> www.simberian.com
Simbeor â Accurate, Productive and Cost-Effective Electromagnetic Signal
Integrity Software
2010 and 2011 DesignVision Award Winner, 2015 Best In Design&Test Finalist
From: leeritchey [mailto:leeritchey@xxxxxxxxxxxxx] ;
Sent: Wednesday, December 7, 2016 10:05 AM
To: heyfitch; shlepnev@xxxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: Re: [SI-LIST] Re: XTalk power flow in differential vias
Was the simulation validated with measurements?
Sent via the Samsung Galaxy S® 6, an AT&T 4G LTE smartphone
-------- Original message --------
From: heyfitch <heyfitch@xxxxxxxxx>
Date: 12/06/2016 8:36 PM (GMT-08:00)
To: leeritchey@xxxxxxxxxxxxx, shlepnev@xxxxxxxxxxxxx, si-list@xxxxxxxxxxxxx
Subject: Re: [SI-LIST] Re: XTalk power flow in differential vias
Lee,
In fiber optics modules, for example, the density is so high that diff vias are
often right next to one another. The natural inclination is to have as few
stitching vias as possible - to have more routing channels. So, 2 stitching
vias per a diff via is typical. Yuriy's video clearly shows how the lower
number of stitching vias result into higher insertion loss. This is a trade
off consideration, imho.
Also, it is desired to have less than 40dB crosstalk between channels. That is
another consideration.
Regards,
Vadim Heyfitch
On Monday, December 5, 2016, 13:49, Lee Ritchey <leeritchey@xxxxxxxxxxxxx>
wrote:
Why are we worrying about differential vias?
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx <javascript:return>
[mailto:si-list-bounce@xxxxxxxxxxxxx ;<javascript:return> ] On
Behalf Of Yuriy Shlepnev
Sent: Monday, December 5, 2016 11:58 AM
To: si-list@xxxxxxxxxxxxx <javascript:return>
Subject: [SI-LIST] XTalk power flow in differential vias
Hello Everyone,
Last Friday I have uploaded visualization of crosstalk power flow in
differential vias - see #2016_13 at http://www.simberian.com/ScreenCasts.php
-> How Interconnects Work (higher quality, but may be slow), YouTube
version is available at https://youtu.be/IyuQIl8T_uE ;
<https://youtu.be/IyuQIl8T_uE%20> The demo video
illustrates two ways for the crosstalk reduction. I was really fascinated
with the power flow view of the crosstalk :-) As always, I will appreciate
any feedback.
Best regards,
Yuriy
Yuriy Shlepnev, Ph.D.
President, Simberian Inc.
2629 Townsgate Rd., Suite #235, Westlake Village, CA 91361, USA Office
+1-702-876-2882; Fax +1-702-482-7903 Cell +1-206-409-2368; Virtual
+1-408-627-7706
Skype: shlepnev
www.simberian.com
Simbeor - Accurate, Productive and Cost-Effective Electromagnetic Signal
Integrity Software
2010 and 2011 DesignVision Award Winner, 2015 Best In Design&Test Finalist
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