Non-volatile semiconductor memory device and memory system using

Details Non-volatile semiconductor memory device and memory system using Non-volatile semiconductor memory device and memory system using

1995-12-21

1997-03-25

Fears, Terrell W.

Static information storage and retrieval

Addressing

Particular decoder or driver circuit

36523001, G11C 1300

Patent

active

056151659

ABSTRACT:
The time required for the program verify and erase verify operations can be shortened. The change of threshold values of memory cells can be suppressed even if the write and erase operations are executed repetitively. After the program and erase operations, whether the operations were properly executed can be judged simultaneously for all bit lines basing upon a change, after the pre-charge, of the potential at each bit line, without changing the column address. In the data rewrite operation, the rewrite operation is not effected for a memory cell with the data once properly written, by changing the data in the data register.

REFERENCES:
patent: 4279024 (1981-07-01), Schrenk
patent: 5126973 (1992-06-01), Garcia et al.
patent: 5172338 (1992-12-01), Mehrotra
patent: 5233610 (1993-08-01), Nakayama
patent: 5343437 (1994-08-01), Johnson et al.

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