Semiconductor memory device with improved read characteristics f

Details Semiconductor memory device with improved read characteristics f Semiconductor memory device with improved read characteristics f

1997-08-29

1999-11-09

Mai, Son

Static information storage and retrieval

Floating gate

Multiple values

3651852, 36518521, G11C 1606

Patent

active

059826622

ABSTRACT:
A semiconductor memory device is described that has an improved read characteristics. The semiconductor memory device includes a plurality of memory cells, a reference cell, a comparator located between the memory cells and the reference cell, and a discriminator coupled to the comparator. The comparator compares the actual signal equivalent to a value of a current flowing in each of the memory cells and reference signals equivalent to a value of a current flowing in the reference cell with each other to output a comparison result signal in each of data reading operation modes. The discriminator discriminates a value of data stored in each of the memory cells based on the comparison result signal. The discriminator includes a circuit shared for discrimination of a data value in each of the data reading operation modes.

REFERENCES:
patent: 5424978 (1995-06-01), Wada et al.
patent: 5550772 (1996-08-01), Gill
patent: 5729492 (1998-03-01), Campardo

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