Semiconductor multivalued memory device determining multivalued

Details Semiconductor multivalued memory device determining multivalued Semiconductor multivalued memory device determining multivalued

1999-04-12

2000-06-13

Hoang, Huan

Static information storage and retrieval

Systems using particular element

Ternary

365104, 365210, G11C 1156

Patent

active

060757221

ABSTRACT:
A semiconductor multivalued read only memory device stores multivalued data in a memory cell array and multivalued reference data in reference cell arrays, and stepwise changes word lines and reference word lines to different active levels for reading out the multivalued data and the corresponding multivalued reference data at different timings so as to determine the value of each multivalued datum by comparing it to the multivalued reference data without undesirable influence of deviated threshold and unintentionally deviated active level.

REFERENCES:
patent: 5933366 (1999-08-01), Yoshikawa

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