| 摘要 |
A multilayer substrate module to which an external ground node (20) supplies a reference ground potential (Vss) includes a plurality of ground lines (170-1, 170-2, 170-3), which correspond to a plurality of internal circuits (210, 220, 230), respectively. A common node (Ncmn) for joining the ground lines (170-1, 170-2, 170-3) is provided in an insulating layer (105C) in the multilayer substrate module. The common node (Ncmn) is coupled electrically to the ground node (20) through a ground pin terminal (204) shared among the internal circuits (210, 220, 230). The common node (Ncmn) is provided preferably in the lowermost insulating layer in the multilayer substrate module (120). The parasitic inductance appearing in a ground current path and shared among the internal circuits (210, 220, 230) can be decreased using fewer ground pin terminals. Therefore, the ground current path is prevented from being circuitous among the internal circuits (210, 220, 23O), resulting in stabilized operation.
|
