[SI-LIST] Re: Resedn:Mitigating PCB fiber weave effect
- From: steve weir <weirsi@xxxxxxxxxx>
- To: Tesla <emcesd@xxxxxxx>
- Date: Fri, 26 Oct 2012 00:51:44 -0700
Lee's books are a good value. There is more to it than just making the
fibers more dense, and Lee goes into that in his book. Technical books
may be quite costly, but they are well worth it. If a personal library
is beyond your means, then maybe you can convince your employer to
create a company library. There is tremendous value that can be gained
from a modest investment of a few thousand dollars.
It rarely pays to write a good technical book. That is one reason why
Lee self-publishes. It takes a tremendous amount of time and effort.
Steve.
On 10/26/2012 12:15 AM, Tesla wrote:
> Hi, Steve
> Thank you very much.
> i read the Lee's website,On The Problem of Jitter and Skew in Gigabit
> and Faster Signals Caused by Laminate Weaves). his solution is using
> more dense dielectric such 3313.
> BTW, I am very curious to read his book. But the price is too high for
> a Chinese EE engineer. Steve, you have a lot of experience in EE. Why
> not write a book for the new engineer?
> Thanks.
> Tesla.
>
>
>
>
>
>
> At 2012-10-26 14:46:29,"steve weir" <weirsi@xxxxxxxxxx> wrote:
> >You would be wise to carefully consider the test conditions evaluated.
> >I am familiar with the Teraspeed boards, and know the rigor involved for
> >what was evaluated. The data presented is very credible. I am less
> >familiar with the Intel work and would have to review Jeff's paper again
> >before offering meaningful comment. You can find an additional point of
> >view based on tests published by Lee Ritchey in his second book,
> >available from his Speeding Edge web-site.
> >
> >Rather than attempt to develop a canned answer which is frequently a bad
> >idea in SI/PI, I think you should spend time looking at the test
> >conditions of each study and how they apply to your circumstances, and
> >then choose your approach accordingly.
> >
> >Steve.
> >
> >
> >On 10/25/2012 10:02 PM, Tesla wrote:
> >> Hi,
> >>
> >> Today read two two Designcon paper about PCB fiber weave effect
> >> 1 The Impact of PCB Laminate Weave on the Electrical Performance of
> >> Differential Signaling at Multi-Gigabit Data Rates
> >> Scott McMorrow
> >> 2 Fiber Weave Effect: Practical Impact Analysis and Mitigation Strategies
> >> Jeff Loyer
> >>
> >> For the method mitigating skew by fiber weave effect. Scott suggest that
> >> use-Panel construction at 45 degrees to the weave.
> >> Jeff suggest that A rotation of 13 drgree is very effective at alleviating
> >> the problem and A 45 degree rotation is not as effective.
> >> For the two methods, which is better? Does the rotation method to reduce
> >> fiber weave effect applied to all kinds of fiber weave(106,1080, 2113 and
> >> so on) or different dense fiber weave may need different degrees rotation?
> >>
> >> Thanks.
> >>
> >> Tesla
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> >>
> >
> >
> >--
> >Steve Weir
> >IPBLOX, LLC
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--
Steve Weir
IPBLOX, LLC
150 N. Center St. #211
Reno, NV 89501
www.ipblox.com
(775) 299-4236 Business
(866) 675-4630 Toll-free
(707) 780-1951 Fax
All contents Copyright (c)2012 IPBLOX, LLC. All Rights Reserved.
This e-mail may contain confidential material.
If you are not the intended recipient, please destroy all records
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