[SI-LIST] Re: One stitching via or more vias is better for 25Gbps application???

  • From: "Lee " <leeritchey@xxxxxxxxxxxxx>
  • To: "steve weir" <weirsi@xxxxxxxxxx>, "Alfred Alfred" <alfred1520list@xxxxxxxxx>
  • Date: Mon, 8 Sep 2014 09:06:24 -0700

You mean like the X2Y tests?
From: steve weir 
Sent: Sunday, September 07, 2014 9:06 PM
To: leeritchey@xxxxxxxxxxxxx ; Alfred Alfred 
Cc: Leeyuyun ; si-list@xxxxxxxxxxxxx 
Subject: Re: [SI-LIST] Re: One stitching via or more vias is better for 25Gbps 
application???

Experiments are an important way to sanity check ideas and simulation results.  
There are lots of ways to put bad assumptions into a simulation model and get 
results that aren't real.  But the flip side is that all experiments are 
limited in their ability to isolate the controlled variable.  Even assuming 
that we have not made any mistakes in our set-up or measurements we still 
always need to be wary about generalizing the result of any given experiment or 
experiments.  

Best Regards,

Steve

On 9/7/2014 8:49 PM, leeritchey@xxxxxxxxxxxxx wrote:

  All of the things proposed don't seem to have any basis.  I, on the other 
hand, have built test boards to find out.  My findings are available in my 
classes and do not show such vias have any value.

  Sent from my HTC One™ X, an AT&T 4G LTE smartphone


  ----- Reply message -----
  From: "Alfred Alfred" mailto:alfred1520list@xxxxxxxxx
  To: mailto:leeritchey@xxxxxxxxxxxxx
  Cc: mailto:weirsi@xxxxxxxxxx, "Leeyuyun" mailto:lee.home.61@xxxxxxxxx, 
mailto:si-list@xxxxxxxxxxxxx mailto:si-list@xxxxxxxxxxxxx
  Subject: [SI-LIST] Re: One stitching via or more vias is better for 25Gbps 
application???
  Date: Sun, Sep 7, 2014 7:26 PM




  Dear List,

  I am very interested in seeing Lee's reply. Where can I find the ungarbled 
version? Thanks.

  Best Regards,
  Alfred


  On Sun, Sep 7, 2014 at 6:41 PM, leeritchey@xxxxxxxxxxxxx 
<leeritchey@xxxxxxxxxxxxx> wrote:

    N ¬²‹§vÉb‘æ›ŠÚ 
²êi¢È¢¶*'­«az»ajzÞjW§‚)Þz¸§ƒôžž×ë¢i² 0Ž ïÿý Úœ 
ÿO ‹LK&j»i†‰Þÿÿÿý ©—)ž²Æ {ÿÿÿñk¢oÿ²×¯{ 
¢¯ÿðz*ì‹ø©nZ1ýÊ&ý:ÿü·žÊ쮟ÿåyïá¢gÿë_à
™¨¥ýÊ&ü'ÿþÈÿ–+-ýúÞzX¬¶Ïè® ÿ²/åŠ
Ëÿ~·ž–+-³ú+ƒô®n7œ·ÿÒ#òÈI?Ñ{ó§zËbµÈbž âjŠ
梷¯‰«"±·­µêߢ½¹ ºljše‰Æ­Š‰ÿÿðÚµïÒº 
ÒzžÿÛMx×OøÜ  ¶ §’ØZ·*.j·œ¢{"uêâž ¡Š _­ê®zw2¦º 
•é¢žZ0~·ª¹éÜÊ׫šÏÒ¶+\†øš²)©iËm…ç ¾+rý©Ý §¶ 
²j·¢ Éh±êk£ ¦ŠÜ­¢È  ©o‰«  ÛkiǬþØ^ɧßyËpj÷¦¡×¬ 
櫶 ,zËk¹Ën­ëÿN §’)àiº.¶ËbµÈo‰«  ÛayƯŠ
Øž²ØZ¶Ø^ÊÚÚ½êìy«-†‹ †Ø^ɪÞr‰íŠ
{š¶*'²‡í…äÄ2–­†ØZµºÞjK µ¦ZÆ+-­©ìŠØ¨ž+'¢Ö 
¢‡Z¦šèÆ)š¶*'ý8^e¬b²È  ©m­©ìŠØ¨ž)ãyËl¶ ¬Š    
Ú•éÞ® ¢žÚ-…ç ¾+rý8^½ªâ¢ë)®Š^®Øž²‡í…ç 
¾+rþf­z¸š—ö§v ¨™ëkËø§r[ Šx0…«o‰«,¶+\†
Ø^q«â·+.­öœzËh ëaz¶§w ^­æŸ}ç-² 0¶ ­²('jW§z¸2¦º)j 
­zËa®‹ †Ø^q«â·(§jY]Š·œ¶*'³ô­z÷ŽŸßûÿm5ãŸ÷Ô 
ÿ-ç²»+§Âº-{ÿÇ‹ô­z÷ÿ ëH-©ÝD»!¢é]uê^ 
Û©¢{ayجµ©Ü{ûâj– ²,Þ¡û"‚v¥¾&š Ø'vËbµÈbž âkò 
¢yruê^ Ú'qªZr+h®û ¾&ÿŠËaz·­º¹éjØe¢Šej¸ ®Ú ­æ­zV« 
è§vç-jw ÿðèzÈ­~+bžÚ6äf鱪i–' ¶*'ÿð¨ºWr¢æ ¾+  ­Š
Ëay·§yø­¡÷ ±íZ × ±íÿý8ZžKÿ-çÿÿÿìµëÞÁè«ÿ ¢®ÈÿŠ
–å£ Ü¢oÿÿý´× ýÿ¿ÿÿÿÿëýuÿÿÿÿÿÿÿÿÿý8^²Ö­zg§¶+ 
jÇ ¢{az'^jØZµ[,²Ø­r § ú虼©
    jËÿýÆ©iÈ­¢µl²øš±©Ý %l²øš²+ uê®j×ÿN 
¢u朢w%¹×¬¶ ­ÿ÷±¦XœŠÛâjÇ(®·¬¦‰ÝŠx-¢È  ©h®È  
©ij*í­©ìŠØ¨žÆ«zz-ÿùÞqë,j¼ÿÿÿÿJׯ{ÿÿ:  ïý´× ÿã  
ü·žÊ쮟
    èµïÿÿô­Š×!Šx,†‹¥u·§yç^w ^ž      Ý­çÞ­éÜz™Z 
ç!jx ÿÿÈv‰è¶Ièà rÊ‹¬j']¢z- ç j|¬¶+\†)à
¾&¬ÿÿÈÁ©í¶‡%j¸ŸÊlª¹ë-Š‰Ú±·¥£ ÿÿùžj{,¶+\†)à
¾&¬ÿùžj{,Š   Ú–øš³ÿ¦y©ì¦‹"¶+Þ²('j_ÿ™æ§²w jدzÈ  
©ÿÿýÿ:yr¢{-Š×!Š
x/‰«ÿÿÿ¾ûï¾ûï¾ûï¾ûïÿûï¾ûï¾ûïÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿöü
 ey«-·
    ,¶+\†)à
¾&¬ÿÿÿÿÿþûï¾ûï¾ûï¾ûïÿûï¾ûï¾ûïÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÃ
…¢·šr -®ç-º·ÿ ­ŠËazŠòmèb ßÖ…«b³*.®·œ¢iž Ö­Š
‰ß¢»-Š×!Š
x/‰«-®ç-º·¢žØ^Û‘›¦Ë-®ç-º·ÿÿÿÿÿÿÿ-çÿþWž®+\…ìÿyªíâ€
 X§“ùÞ·ÿÿÿm5ãÿ ïÿÿÿÿ÷ÿ^ÿÿÿÿÿÿÿÿÿÿÿÿÿ6‹-Š×!Å 
x/‰« ­éÞy× ýh^­çbvØb²'^j 
­²Ö«µçÿÿÿÿÿÿÿÿÿÿüêâ‚)ڔǬ±¨ 
ÿÿÿüZè›òÞ{+²º 
ÿÿôžžßÒjÛ«u¬ÿIêmzfÞ¯NÿÛMxãý¹èº›ÿɨh£÷(›ø+¢ê 
²/åŠËÿÿÿÿÿÿËŠËZ­Èb½ë ­ëâ{ ›•æ­ÿÿÿþ m§ÿÿà 
ÿ~·ž–+-³ú+ƒö«r ¯zÏì‹ùb²ßÿÿÿÿÿó¥wúkŠŠí 
›§{¯öÓMÿ–+-j·!Š÷¬j·¯‰ì nWš·ÿÿÿøm¶Ÿÿÿ 0þ«%þw­ÿ 
ú¶›ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ6‹â®ë ¢éÝŠ{aŠ
Éž²Æ {ÿÿÿð¡yÉ u¼€Toðà ھ Ü¢oÿÿõ^®È¨Ÿý´× 
ôÿŽúçõb®ë jÖ›jÇÿãMyÿÍzÛô^•æ¬x6­{ý=ÿN × 
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿôèº{.nÇ+‰·Ÿ®‰¬‹ùb²ßÿÿû"þX¬·úު笷÷ëyéb²Ûÿ¢¸0Å
 Ã˜Ã¿Âº{.nÇ+‰·ÿŠ{ay+› ç-~'Â¥wÿÿÿÿè®Ú vh§ŠË^¯*.®g¦mêì†
*_®‰šÁæéj ÿ‚‹hÿÿÿ†Ûiÿÿðà ߭祊ËlþŠàÿ ›¥¨ 
þÈÿ–+-ÿÿÿÿñh® ¥§ÿÿþÈÿ–+-þ·ª¹ë-ýúÞzX¬¶Ïè® "¶ 
ázZÿŠ{ay+› ç-~'¥wÿÿÿÿÿÿòâ²×è®é¢±§ zË"nWš·ÿÿþ 
m§ÿÿµç!þ
    躛ÿɨh£÷(›ø+¢ê ²/åŠËÿÿÿÿü¸¬µªÜ†
+Þ±ªÞ¾'°i¹^jßÿÿøm¶Ÿÿÿ 0ýúÞzX¬¶Ïè® Ú­Èb½ë?²/åŠ
Ëÿÿÿÿüé]þšâ¢»h&éÞëý´Ó_åŠËZ­Èb½ë ­ëâ{ 
›•æ­ÿÿÿ†Ûiÿÿðà 
ê²_çzßðo«i»ÿÿÿÿÿÿÿÿÿÿÿÿô­z÷–z*ÿüƒÁ,åÿ,°ÿÿ^|ÐjÚ
 ÓèŠ{Vk/ÿ1-øëÏÿý §£óUóÞvßÿ}÷Ïÿà ÿŠ–å£ 
Ü¢oÿÿÿûïŸö÷ßøÛ~ 
ºÈ§zËÿÿÿ:ëþ»çþ:ßDè–_ß­çÿÿþôïþüÓý}çQZÇÿÿü   
er‰íz{l
    Šr®(!·÷ÿÛMw ðK9 Ë,/À–Tb‚ lEë ®÷ ÿÿÓ†+ 
þf¢–f²r‰íj)Ü¢wâué퉩fj׫‰©ÿÿò Ê‹š­éè¶Ø^Š{^ × 
­ç"¦'§·úey« uë-®Œš–ZÞrŠÝ³ÿÚ Ùè¶'ò¶ 
¬zw^¯ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿôèº{.nÇ+‰·Ÿ®‰¬‹ùb²ßÿþÈÿ–+-þ·ª¹ë-ýúÞzX¬¶Ïè®
 "¶ 
îžË›±ÊâmïâžØ^JæãyË_‰é]ÿÿÿ¢»hiÙ¢ž+-z¼¨º¹ž™·«²
 ©~º&k ›¥¨ þ
    -£ÿÿ†Ûiÿÿðà ߭祊ËlþŠàÿ ›¥¨ þÈÿ–+-ÿÿÿ Š
ázZÿÿû"þX¬·úު笷÷ëyéb²Ûÿ¢¸0Š
Øÿ…éiþ)í…ä®n7œµøž•ßÿÿÿÿ.+-~Šîš+ 
qǬ²&åy«ÿÿøm¶Ÿÿþל‡ø+¢êlÿ&¡¢ Ü¢oà
®‹©þÈÿ–+-ÿÿÿ.+-j·!Š÷¬j·¯‰ì nWš·ÿÿ†Ûiÿÿðà 
߭祊ËlþŠàýªÜ†
+Þ³û"þX¬·ÿÿüé]þšâ¢»h&éÞëý´Ó_åŠËZ­Èb½ë ­ëâ{ 
›•æ­ÿÿá¶Úÿÿü0Ãú¬—ùÞ·ü êÚnÿÿÿÿô­z÷–z*È< 
Î_òË ^|ÐjÚ ÓèŠ{Vk# ߎ¼õ 
§£óUóÞvßÿ}÷Ì0Ãø©nZ1ýÊ&ÿ¾ùÿo}ÿ ·è ¬Š
w¬³ÿ:ëþ»çþ:ßDè–_ß­çÿïNÿïÍÿ×Þu 
¬@–W(ž×§¶À¨§*â‚ ÿsý´×r  ³—ü²Âü   eF(!¶Ä^±êïyßÓ†
+ 
þf¢–f²r‰íj)Ü¢wâué퉩fj׫‰©ÿ!ü¨¹ªÞž‹m…觵éÝyÚÞr*bz{ÿ¦Wš±ç^²ÚèÉ©e­ç(­Û
  Ùè¶'ò¶ 
¬zw^¯ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿN‹§²æìr¸›yúèšÈÿ–+-þÈÿ–+-þ·ª¹ë-ýúÞzX¬¶Ïè®
 "¶ îžË›±ÊâmïâžØ^JæãyË_‰é]¢»hiÙ¢ž+-z¼¨º¹ž™·«² 
©~º&k ›¥¨ þ
    -£øm¶Ÿÿÿ 0ýúÞzX¬¶Ïè® ðyºZ ïì‹ùb²Ñh® 
¥§û"þX¬·úު笷÷ëyéb²Ûÿ¢¸0Š
Øÿ…éiþ)í…ä®n7œµøž•Òâ²×è®é¢±§ 
zË"nWš·øm¶Ÿÿþל‡ø+¢êlÿ&¡¢ Ü¢o஋©þÈÿ–+-.+-j·!Š
÷¬j·¯‰ì nWš·øm¶Ÿÿÿ 0ýúÞzX¬¶Ïè® Ú­Èb½ë?²/åŠ
ËN•ßé®*+¶‚n îÿÛM5þX¬µªÜ†
+Þ±ªÞ¾'°i¹^jßá¶Úÿÿü0Ãú¬—ùÞ·ü êÚn
    ------------------------------------------------------------------
    To unsubscribe from si-list:
    si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

    or to administer your membership from a web page, go to:
    //www.freelists.org/webpage/si-list

    For help:
    si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


    List forum  is accessible at:
                   http://tech.groups.yahoo.com/group/si-list

    List archives are viewable at:
                    //www.freelists.org/archives/si-list

    Old (prior to June 6, 2001) list archives are viewable at:
                    http://www.qsl.net/wb6tpu







-- 
Steve Weir
IPBLOX, LLC 
1580 Grand Point Way
MS 34689
Reno, NV  89523-9998 
www.ipblox.com

(775) 299-4236 Business
(866) 675-4630 Toll-free
(707) 780-1951 Fax

All contents Copyright (c)2013 IPBLOX, LLC.  All Rights Reserved.
This e-mail may contain confidential material.
If you are not the intended recipient, please destroy all records
and notify the sender.
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4765 / Virus Database: 4015/8171 - Release Date: 09/07/14

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


List forum  is accessible at:
               http://tech.groups.yahoo.com/group/si-list

List archives are viewable at:     
                //www.freelists.org/archives/si-list
 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu
  

Other related posts: