| 摘要 |
PURPOSE:To minimize a voltage fluctuation quantity to be fed into a logical substrate by providing a feeding port at the center of a logical unit and further, making large the sectional area of a bus bar at the central part to which a large currents concentrate concerning the structure of the feeding bus bar. CONSTITUTION:A logical card 2 is mounted on a mother board 1 through a mother board side connector 4 and a logical card side connector 5. The logical card 2 is fed by connecting a power source unit 10 to a mother board bus bar 6 through a power source bus bar 9 and a bus bar 7 by bolts 8 and further, connecting the mother board bus bar 6 with the mother board 1 by screws 11. When the logical card 2 to need the large current is mounted at the central part, the voltage fluctuation quantity becomes less than that at the time of a one-side feeding, the sectional area of the central part to which the currents concentrate is made larger by brazing a connecting bus bar 12 and the mother board bus bar 6 and a voltage drop becomes less. |
