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老外的layout意见,大家看看具体啥意思?是针对DCDC模块。主要这句不太清楚什么意思([size=14.6667px]the layers above and below these nodes should have cutouts in any copper pours and traces removed.)& \- p7 r; J; x0 Q1 T+ i8 F# k
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Thereis another technique that will help reduce the noise that is coupled from the DCDCto other circuits. The switching node, which is LX1 for the 4V boost andthe node with L1, Q2, D1 for the 6V boost, has a lot of high energy switchingthat can couple to other circuits. If possible, the layers above andbelow these nodes should have cutouts in any copper pours and tracesremoved. I realize it is not possible to remove copper for all layersabove/below these nodes. However, by removing copper from as manyadjacent layers as possible, this coupling will be reduced. $ k$ }. |7 }2 ?$ { i
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