H - Electricity – 05 – K
Patent
H - Electricity
05
K
356/10, 356/11
H05K 1/02 (2006.01)
Patent
CA 1200920
ABSTRACT There is described a six-layer printed circuit card in which the first, third and sixth layers are signal carrying layers for intercon- necting various components forming a personal computer. The second and fifth layers are both ground plane layers and the addition of a second ground plane layer to a printed circuit card reduces the electromagnetic interference emitted from the closely packed components and lines. The final layer of the card is a voltage plane. The components on the printed circuit board include eight input/output (I/O) connectors to which eight other cards controlling various I/O devices can be connected. Seven of the eight I/O connectors are interconnected to a conventional I/O bus. The eight connector is interconnected to some lines of the I/O bus and to some lines of the internal bus throughout the card.
459093
Brewer James A.
Langgood John K.
Markham Harvey R.
International Business Machines Corporation
Kerr Alexander
LandOfFree
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