Semiconductor memory device with protection cells

Details Semiconductor memory device with protection cells Semiconductor memory device with protection cells

1988-02-26

1989-10-17

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Differential sensing

365203, G11C 702

Patent

active

048751944

ABSTRACT:
For preventing sense amplifier circuits associated with memory cells from misjudgment, there is proposed a semiconductor memory device comprising protection cells formed between memory cell array and peripheral circuits, and the protection cells are coupled to an additional bit line pair precharged to a predetermined voltage level approximately equal to those of bit line pairs coupled to the memory cells, so that no difference voltage takes place between the additional bit line pair and the neighboring bit line pair, thereby eliminating a difference in characteristics of the sense amplifier circuits coupled thereto.

REFERENCES:
patent: 4435793 (1984-03-01), Ochii

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