Static random access memory with redundancy

Details Static random access memory with redundancy Static random access memory with redundancy

1990-02-28

1991-10-22

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Bad bit

371 102, G11C 700

Patent

active

050601970

ABSTRACT:
A semiconductor memory device has normal memory blocks and redundant memory blocks for storing data therein. To elevate the redundancy efficiency, the memory device includes a number of normal block selectors for selecting the normal blocks, a number of redundant decoders for sensing a redundant mode on a basis of address signals provided thereto from an address buffer, a block selection decoder for generating a block selection signal by receiving an external address signal shaped, and a redundancy combining signal generator for generating a normal block selection signal and a redundant block selection signal by receiving output of the block selection decoder and output of the redundant decoder.

REFERENCES:
patent: 4829480 (1989-05-01), Seo
patent: 4918662 (1990-04-01), Kondo

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