Static information storage and retrieval – Read/write circuit – Bad bit
Patent
1993-07-12
1996-01-23
Nelms, David C.
Static information storage and retrieval
Read/write circuit
Bad bit
36523003, 3652257, 36523006, 39518205, G11C 1300
Patent
active
054870402
ABSTRACT:
To provide a type of semiconductor memory device characterized by the fact that the area occupied by the redundant memory address decoder on the chip is minimized without reducing the redundancy of the defective memory, and hence the cost of the semiconductor memory device can be cut.
It has both redundant decoders that select the redundant memory in response to the all address bits and the redundant decoders which select the redundant memory group in response to a portion of the address bits, so as to increase the efficiency in saving the defective memory.
REFERENCES:
patent: 5272672 (1993-12-01), Ogihara
Saeki Tetsuya
Sukegawa Shunichi
Donaldson Richard L.
Hiller William E.
Hitachi , Ltd.
Hoang Huan
Nelms David C.
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