| 摘要 |
<p>A computer system accepting feature cards for, for example, coupling external peripheral devices includes a plurality of sockets mounted on the planar board to accept edge connectors on the cards, and slots in the main enclosure to permit coupling to external peripherals. To reduce electromagnetic radiation, two techniques are used. In the first, the sockets have two rows of contacts for contacting pins on opposite side of the edge connectors, and a ground contact is positioned between each group of three original connectors of each row of contacts. The signal and ground contact in the rows are offset so that each signal contact is not more than one position away from a ground contact in either row. In the second technique, the slots in the main enclosure have a depth such as to define channels, and the brackets on the cards are of V-shaped cross-section such as to fit within the channels. The channel walls are conductive, and the brackets are shaped to define spaced outward contact points which closely engage the channel walls.</p> |
