Memory device having a redundant memory block

Details Memory device having a redundant memory block Memory device having a redundant memory block

1998-11-13

1999-11-02

Fears, Terrell W.

Static information storage and retrieval

Addressing

Plural blocks or banks

36523002, 36523004, Q11C 1300

Patent

active

059783060

ABSTRACT:
A memory device having a redundant memory block according to the invention is disclosed. The memory device includes a main memory block, a redundant memory block, a first decoder, a second decoder and an address control circuit. The address control circuit is used to set an address corresponding to another address where a certain defective byte of memory bytes is located. When an external address signal is identical to the address set by the address control circuit, the address is transferred to a redundant memory block, so that the defective byte of memory cells can be replaced with a spare byte of memory cells, thereby increasing manufacturing yield.

REFERENCES:
patent: 5499216 (1996-03-01), Yamamoto

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