| 摘要 |
A computer bus comprises conductive tracks which extend in four layers. Each plug-in point (I, II, III) has three columns (a, b, c) of plug-in holes arranged in a plurality of rows (1, 2, 3, ...). The conductive track which links the plug-in holes having the index a2 in sequence passes between the plug-in points I and II through the first layer, but between the points II and III through the fourth layer. The same principle applies to the conductive track which connects plug-in holes diagonally adjacent to the plug-in holes a2 or the second holes thereafter. The conductive tracks which connect the adjacent holes to the plug-in holes a2 pass through the fourth layer when the conductive track connecting the plug-in holes a2 in sequence passes through the first layer, and vice-versa. This ensures that the conductive tracks starting from neighbouring holes are situated a maximum distance apart. The adjacent conductive tracks which pass through the same layer lead to non-adjacent plug-in holes, which results in minimal signal coupling. In addition, the alternation between the layers leaves sufficient space in each layer for a protective grid, which further improves the decoupling and shielding of the signals transmitted by the bus. Since the alternation of the conducting tracks between the layers is carried out according to the same principle, all the conducting trucks have the same length. This enables signals with identical transmission times to be obtained. A series inductance is also provided for each transverse capacitor in such a way that signals of different frequencies travel at the same speed.
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