Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

2006-03-14

2006-03-14

Nguyen, Tan T. (Department: 2827)

Static information storage and retrieval

Systems using particular element

Capacitors

C365S190000

Reexamination Certificate

active

07012831

ABSTRACT:
A semiconductor memory device for realizing high speed writing while maintaining the credibility of write data, wherein a write gate is provided between a bit line and an input/output data line of a memory cell array, the write gate becomes open when a selected word line becomes an activation state and a write signal set to the input/output data line in accordance with write data is applied to the selected bit line via the write gate when writing, so that writing of data to a selected memory cell can be performed immediately after activating the selected word line when writing, and writing to the selected memory cell can be performed in parallel with reading and refreshing of non-selected memory cells, and consequently, a time for storing charges to the selected memory cell can be sufficiently secured and writing at a high speed can be realized.

REFERENCES:
patent: 4943944 (1990-07-01), Sakui et al.
patent: 5012447 (1991-04-01), Matsuda et al.
patent: 5220527 (1993-06-01), Ohsawa
patent: 5323345 (1994-06-01), Ohsawa

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