sorry about the edge rate i think that should be around 50 pico sec. > > From: "richard moffat" <richard.moffat@xxxxxxxxxxxxxxxxxxx> > Date: 2005/02/20 Sun PM 02:52:42 EST > To: <icu-pcb-forum@xxxxxxxxxxxxx> > Subject: [PCB_FORUM] Re: high speed board material. > > Hi > > Yeah, similar - we run up to 3.125GHz at the moment. The biggest thing > we have to worry about is loss and skin effect. > > Are you sure the edge rate is 9ns? That's huge. For PCI it probably > should be ~ 200-300 ps or so, at a guess, depending on the chip > technology. > > Cadence put put GHz simulation tools, but they are expensive. > > Cheers, > Richard > > >>> austin@xxxxxxxxxxxx 19/02/2005 11:49:32 a.m. >>> > Hi, > > FR-4 is fine for your specs below. I have FR-4 boards that run > Infiniband > 4x (2.5GHz x 4 signal lanes), and no problem. That's the highest I've > gone > on FR-4. I do suggest you do simulation though, and you pay careful > attention to routing rules. > > BTW, 1GHz better have better than a 9ns edge rate, or you won't get > any > signal ;-) > > Austin > > > > -----Original Message----- > > From: sjcharles@xxxxxxx [mailto:sjcharles@xxxxxxx] > > Sent: Friday, February 18, 2005 11:37 AM > > To: icu-pcb-forum@xxxxxxxxxxxxx > > Subject: [PCB_FORUM] Re: high speed board material. > > > > > > speed 1 ghz, 8 ly, 1/2 oz, rate edge approx 9n, 5/5 width and > > spacing maybe 4 > > for necking. two or threes pair controlled Z. If Fr4 will do the > > job then i that > > would be fine. > > > > thanks > > > ----------------------------------------------------------- > To subscribe/unsubscribe: > Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx > with a subject of subscribe or unsubscribe > > To view the archives of this list please login at > //www.freelists.org. Our list name is icu-pcb-forum > or go to //www.freelists.org/archives/icu-pcb-forum/ > > Problems or Questions: > Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx > > Want to post a job listing ? DON'T DO IT HERE! > Better yet, join our jobs listing forum. > > SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx > POST: icu-jobs-forum@xxxxxxxxxx > ----------------------------------------------------------- > > NOTICE: This message contains privileged and confidential > information intended only for the use of the addressee > named above. If you are not the intended recipient of > this message you are hereby notified that you must not > disseminate, copy or take any action in reliance on it. > If you have received this message in error please > notify Allied Telesyn Research Ltd immediately. > Any views expressed in this message are those of the > individual sender, except where the sender has the > authority to issue and specifically states them to > be the views of Allied Telesyn Research. > ----------------------------------------------------------- > To subscribe/unsubscribe: > Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx > with a subject of subscribe or unsubscribe > > To view the archives of this list please login at > //www.freelists.org. Our list name is icu-pcb-forum > or go to //www.freelists.org/archives/icu-pcb-forum/ > > Problems or Questions: > Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx > > Want to post a job listing ? DON'T DO IT HERE! > Better yet, join our jobs listing forum. > > SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx > POST: icu-jobs-forum@xxxxxxxxxx > ----------------------------------------------------------- > ----------------------------------------------------------- To subscribe/unsubscribe: Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx with a subject of subscribe or unsubscribe To view the archives of this list please login at //www.freelists.org. Our list name is icu-pcb-forum or go to //www.freelists.org/archives/icu-pcb-forum/ Problems or Questions: Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx Want to post a job listing ? DON'T DO IT HERE! Better yet, join our jobs listing forum. SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx POST: icu-jobs-forum@xxxxxxxxxx -----------------------------------------------------------