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ControllingRadiatedEMIThroughPCBStackControllingRadiatedEMIThroughPCBStack-up(09/08/00,12:33p.m.ET)ByRickHartley,L-3Communications,AvionicSystemsThere'smorethanonewaytoskinacatandevenmorewaystobattleEMI,beginningatoneofthemostbasiclevelsofPCBdesign.ClearlythereareanumberofcircuitandPCBdesigntechniquesthatdesignersandengineersneedtomasterinordertocontrolhigh-frequency,radiatedEMI.It'sfairlywellunderstoodthatcircuitboardstack-upcanplayamajorroleintheefforttocontrolEMI.Agoodstack-uphelpstocontainelectricandmagneticfieldsandisaverystrongaidintheefforttobypass/decouplethepowerbus.Thisarticlewillexaminetheseissuesanddetailseveralboardstack-upsdesignedtoaccomplishthesegoals.ThepowerbusWhenanIC……