| 摘要 |
A printed circuit mother board, for interconnecting the respective edge connectors of a plurality of other printed circuit boards having digital circuitry thereon, has a set of generally straight, approximately parallel tracks on each side. Each set of tracks comprises alternate signal tracks and ground tracks, and the ground tracks of each set are interconnected with each other to approximate to a ground plane. Additionally, the tracks on one side of the board are slightly laterally displaced with respect to the tracks on the other side, so that each signal track on either side is opposite a ground track on the other side. The possibility of interference between signals carried by the signal tracks is thus reduced, and the board has transmission line characteristics.
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