Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1991-03-28
1992-03-17
Epps, Georgia
Static information storage and retrieval
Magnetic bubbles
Guide structure
357 41, 357 40, 357 236, 36518901, H01L 2710, H01L 2702, G11C 700
Patent
active
050973134
ABSTRACT:
The semiconductor memory device according to the present invention comprises a plurality of memory cell arrays having a plurality of memory cells and a plurality of bit liens and word lines connected respectively thereto, and I/O lines which run in the direction of the word line and are connected with a given number of bit lines of the bit lines via a selection circuit, the bit lines being divided into a first and a second bit line groups of a given number of lines, the I/O lines having a first I/O line connected to a given number of lines in the first bit line group via the selection circuit and a second I/O line connected to a given number of lines in the second bit line group via the selection circuit, and the first and second I/O lines are provided to extend in opposite directions. Because of the construction as mentioned above, the arrangement and the location of the input/output pads do not affect the length of the signal line extending from the bit lines to the input/output pads, thereby preventing the data bus from becoming redundantly long and enabling high speed operations.
REFERENCES:
patent: 4833518 (1989-05-01), Matsuda et al.
patent: 4904887 (1990-02-01), Sugiyama et al.
patent: 4945393 (1990-07-01), Belfram et al
patent: 4962322 (1990-10-01), Chapman
Epps Georgia
NEC Corporation
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