Abstract: A printed circuit board includes a ground plane, a power plane having a first main surface and a second main surface opposite to the first main surface, wherein the second main surface faces the ground plane and a shielding structure partially covering the power plane. The shielding structure includes a metal structure covering a peripheral area of the first main surface from a direction facing the first main surface and a plurality of vias electrically and mechanically coupling the metal structure to the ground plane.

Abstract: Method and apparatus to control delay between lanes in an I/O interface is disclosed. To control the delay between the lanes in the I/O system a programmed delay may be determined and introduced between the lanes. For this purpose the effective time “T” of the lanes is determined. The number of lanes “N” in the I/O interface is identified. The programmed lane to lane delay “D” is determined and a delay circuit having the programmed delay may be introduced between the lanes to reduce AC peak to peak noise in the I/O system.