Zeeshan, Feel free to send me the bill. It's the most I can do. Scott Scott McMorrow Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 (401) 284-1827 Business (401) 284-1840 Fax http://www.teraspeed.com Teraspeed® is the registered service mark of Teraspeed Consulting Group LLC Zeeshan Siddiqi wrote: > Scott: you owe me a keyboard.. i laughed so hard pepsi > came out my nose.. thanks for the mid week relief. > > Pon: We are all here to learn and share our > experiences. If you have a specific questions, than > the gurus will be more than happy to impart their > wisdom, but the questions you presented were so open > ended that most of us here could fill entire volumes > discussing them. Hope you would spend some time > googling the material and come back with some > interesting questions. Best of luck. > > -zeeshan > > > >>> [Original Message] >>> From: Scott McMorrow <scott@xxxxxxxxxxxxx> >>> To: <ponganesh@xxxxxxxxxxxxxxxxxx> >>> Cc: <si-list@xxxxxxxxxxxxx> >>> Date: 5/30/2007 10:47:39 AM >>> Subject: [SI-LIST] Re: High Speed Routing >>> >>> Pon, >>> >>> Go out and do your own research before you pose a >>> >> plethora of questions >> >>> like this. It looks like you are a University >>> >> student trying to answer >> >>> questions on a take-home test. >>> >>> Scott >>> >>> Scott McMorrow >>> Teraspeed Consulting Group LLC >>> 121 North River Drive >>> Narragansett, RI 02882 >>> (401) 284-1827 Business >>> (401) 284-1840 Fax >>> >>> http://www.teraspeed.com >>> >>> Teraspeed® is the registered service mark of >>> Teraspeed Consulting Group LLC >>> >>> >>> >>> Pon Ganesh wrote: >>> >>>> Expecting your answers for the below. >>>> a.. I have two groups of signals Group-A (3GHz >>>> >> differntial pair) and >> Group-B (16bit, 250MHz DDR2 single ended lines). >> Both A&B can't be routed >> in inner layers. Either one must be routed on >> Microstrip. Which one u ll >> route in Micro strip (Single ended-250Mhz/diff3Ghz) >> ? >> >>>> b.. Whats the use of dual stripline, when >>>> >> no.of layers is not a >> issue., >> >>>> c.. why don't u prefer odd-no of layers ? ( >>>> >> answers other than... PCB >> warpage, Fab feasilbility and Cost) >> >>>> d.. U have 20MHz and 200MHz signal on a same >>>> >> layer. How ll u route . >> Isolation ? >> >>>> e.. How stitching capacitors are useful to >>>> >> minimize in-rush current >> >>>> f.. When ll u use spoke vias. whts the >>>> >> disadvantage of spoke vias >> >>>> g.. Why do we noramlly short isolated Analog >>>> >> and Digital digital GNDs >> on a small area >> >>>> Thanks, >>>> Pon Ganesh >>>> **************** CAUTION - Disclaimer >>>> >> *****************This email may >> contain confidential and privileged material for the >> >>>> sole use of the intended recipient(s). Any >>>> >> review, use, retention, >> distribution or disclosure by others is strictly >> prohibited. If you are not >> the intended recipient (or authorized to receive for >> the recipient), please >> contact the sender by reply email and delete all >> copies of this message. >> Also, email is susceptible to data corruption, >> interception, tampering, >> unauthorized amendment and viruses. 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