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我记得这好像是为了符合 EMI 规范。
http://www.intel.com/design/pentiumii/applnots/24333402.PDF
Cabling
Cables make excellent antennas. The following suggestions reduce the impact of cables on EMI
radiation.
• Provide adequate grounding for all cables.
• Ground both ends of cables to chassis ground.
• To prevent coupling, keep all cables away from chassis seams.
• Use ferrite beads to attenuate common mode noise on I/O cables. |
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