Anti-pad for signal and power vias in printed circuit board
摘要:
In one embodiment, an apparatus includes a plurality of layers in a printed circuit board comprising at least one power plane and at least one ground plane, and a plurality of vias extending through the plurality of layers and connecting two or more of the layers, the plurality of vias comprising at least one pair of differential signal vias and at least one pair of power vias, the signal vias and power vias surrounded by a plurality of ground vias. The ground plane includes an anti-pad formed therein by an opening defined by removal of material, with the pair of differential signal vias and pair of power vias extending through the anti-pad in the ground plane to reduce power via resonance.
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