Word line driver in a multi-value mask ROM

Details Word line driver in a multi-value mask ROM Word line driver in a multi-value mask ROM

1997-09-25

1999-04-06

Nelms, David

Static information storage and retrieval

Addressing

Particular decoder or driver circuit

365168, 365203, 365194, G11C 800

Patent

active

058927271

ABSTRACT:
A method for driving a word line in a multi-value mask ROM comprises the consecutive steps of precharging the word line by a source potential, setting the word line at a first potential which is lower than the source potential and reading data from a selected memory cell, precharging the word line by the source potential, charging the word line at the second potential which is lower than the source potential and reading data from the selected memory cell, setting the word line at the source potential and reading data from the selected memory cell. The precharge of the word line reduces the read time for the multi-value mask ROM.

REFERENCES:
patent: 4809224 (1989-02-01), Suzuki et al.
patent: 4985865 (1991-01-01), Houston
patent: 5457650 (1995-10-01), Sugiura et al.
patent: 5610872 (1997-03-01), Toda
patent: 5680343 (1997-10-01), Kamaya

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