公开(公告)号：DE3408046A1

公开(公告)日：1984-12-13

申请号：DE3408046

申请日：1984-03-05

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  LANGGOOD JOHN KENNEDY ,  MARKHAM HARVEY ROSSEN

IPC: H05K9/00 ,  H05K1/00 ,  H05K1/02 ,  H05K3/46

Abstract: In a printed-circuit board which consists of six layers, the first, third and sixth layers are used as carrier layers for lead connections between the components of a personal computer. The second and fifth layers are two earthing planes which together reduce the electromagnetic interference produced by the densely packaged components and leads. The remaining fourth layer is a voltage plane. The two earthing planes are adjacent to the two signal-line planes which are located furthest towards the outside. A third signal-line plane and a voltage plane are located between the two earthing planes.

公开(公告)号：GB2356542A

公开(公告)日：2001-05-23

申请号：GB0023147

申请日：2000-09-20

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  GUPTA SANJAY

IPC: G09G5/00 ,  H04N3/14

Abstract: Reduction of video monitor/cable bandwidth is achieved without losing video performance by the compression ( 276 ) of display data before transmission via cable 272 to a display monitor ( 270 ). Decompression is performed ( 274 ) within the display monitor unit, the data then being displayed on the monitor screen ( 270 ).

公开(公告)号：HK17790A

公开(公告)日：1990-03-16

申请号：HK17790

申请日：1990-03-08

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  KUMMER DAVID ALLEN ,  LANGGOOD JOHN KENNEDY

IPC: H05K1/00 ,  H05K1/02 ,  H05K1/11 ,  H05K1/18

Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 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 eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.

公开(公告)号：IT1196039B

公开(公告)日：1988-11-10

申请号：IT1988284

申请日：1984-03-02

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  LANGGOOD JOHN KENNEDY ,  MARKHAM HARVEY ROSSEN

IPC: H05K1/00 ,  H05K1/02 ,  H05K

Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 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 eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.

公开(公告)号：IT1196038B

公开(公告)日：1988-11-10

申请号：IT1988184

申请日：1984-03-02

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  KUMMER DAVID ALLEN ,  LANGOOD JOHN KENNEDY

IPC: H05K1/00 ,  H05K1/02 ,  H05K

Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 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 eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.

公开(公告)号：FR2557754A3

公开(公告)日：1985-07-05

申请号：FR8321051

申请日：1983-12-28

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  LANGGOOD JOHN KENNEDY ,  MARKHAM HARVEY ROSSEN

IPC: H05K1/02 ,  H05K3/42 ,  H05K1/11 ,  H05K3/46

Abstract: Printed-circuit board for a personal computer, comprising six layers, namely, in order, a first signal plane, a ground plane, a second signal plane, a voltage-supply plane, a second ground plane and a third signal plane. The use of two ground planes sandwiched between the signal planes greatly reduces electromagnetic interference emitted by the closely-packed components and conductors.

公开(公告)号：IT8419881D0

公开(公告)日：1984-03-02

申请号：IT1988184

申请日：1984-03-02

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  KUMMER DAVID ALLEN ,  LANGGOOD JOHN KENNEDY

IPC: H05K1/00 ,  H05K1/02 ,  H05K

Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 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 eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.