Row redundancy circuit sharing a fuse box

Details Row redundancy circuit sharing a fuse box Row redundancy circuit sharing a fuse box

1993-07-13

1994-09-20

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Bad bit

3652257, 371 103, G11C 700

Patent

active

053495560

ABSTRACT:
The present invention discloses a row redundancy circuit in which, when the number of word lines containing defective memory cells in a first normal memory cell array is greater than the number of redundant word lines in a first redundant memory cell array, an adjacent redundant row address decoder and associated adjacent redundant word lines are used to repair such excess number of defects. Therefore, there is no need to increase the number of redundant row address decoders and redundancy efficiency is greatly increased.

REFERENCES:
patent: 4660179 (1987-04-01), Aoyama
patent: 4727516 (1988-02-01), Yoshida et al.
patent: 5255234 (1993-10-01), Seok

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