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PracticalGuidetoHigh-SpeedPCB-Layout-AnalogDevicesAPracticalGuidetoHigh-SpeedPrinted-Circuit-BoardLayoutByJohnArdizzoni[john.ardizzoni@analog.com]Despiteitscriticalnatureinhigh-speedcircuitry,printed-circuitboard(PCB)layoutisoftenoneofthelaststepsinthedesignprocess.Therearemanyaspectstohigh-speedPCBlayout;volumeshavebeenwrittenonthesubject.Thisarticleaddresseshigh-speedlayoutfromapracticalperspective.Amajoraimistohelpsensitizenewcomerstothemanyandvariousconsiderationstheyneedtoaddresswhendesigningboardlayoutsforhigh-speedcircuitry.Butitisalsointendedasarefreshertobenetthosewhohavebeenawayfromboardlayoutforawhile.Noteverytopiccanbecoveredindetailinthespaceavailablehere,butweaddresskeyareasthatcanhavethegreatestpayoff……