Static information storage and retrieval – Systems using particular element – Flip-flop
Patent
1998-09-01
2000-04-04
Nelms, David
Static information storage and retrieval
Systems using particular element
Flip-flop
36518904, 36523005, G11C 1100
Patent
active
060469307
ABSTRACT:
A column (10) of a memory array includes a plurality of memory cells (11, 12) each having first and second independent access ports (T1, T2) and a cross-coupled memory latch (20). The first access port (T1) of each memory cell (11, 12) connects a first node (21) of the latch (20) to a first bit line (14), while the second access port (T2) of each memory cell connects a second node (22) of the latch (20) to a second bit line (15). A clearing arrangement (T7) is connected to the second bit line (15) for selectively coupling the second bit line to ground. A write driver is connected to the first bit line (14) for writing data to the memory cells (11, 12) in the form of single-ended signals. A memory cell is placed in a preset condition by simultaneously coupling the second node (22) to the second bit line (15) through the second access port (T2) and coupling the second bit line to ground through the clearing arrangement (T7). Once in the preset condition, data may be written to the cell by coupling the first bit line (14) to the first node (21) through the first access port (T1) and driving data to the first bit line.
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Ciraula Michael Kevin
Lattimore George McNeil
Leasure Terry Lee
Yeung Gus Wai-Yen
Auduong Gene N.
Culbertson Russell D.
England Anthony V. S.
International Business Machines - Corporation
Nelms David
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