Semiconductor memory device including subword drivers

Details Semiconductor memory device including subword drivers Semiconductor memory device including subword drivers

2005-10-11

2005-10-11

Ho, Hoai (Department: 2827)

Static information storage and retrieval

Addressing

Particular decoder or driver circuit

C365S230030

Reexamination Certificate

active

06954398

ABSTRACT:
A semiconductor memory device is capable of performing a faster operation by reducing a load applied to a subword selection line or driving a subword driver provided for each memory mat. In a drive method of subword drivers that are actuated in response to subword selection signals supplied through subword selection lines, the subword selection lines are branched according to the number of memory mats. Each subword selection signal has a polarity to a branching position and an inverted polarity from each branching position to each subword driver. The inverted subword selection signal together with a main word signal are calculated to operation in each subword driver and output as a subword drive signal. The plurality of subword drivers share an inverter circuit for inverting the main word signals so as to permit a simplified circuit configuration.

REFERENCES:
patent: 5602796 (1997-02-01), Sugio
patent: 6011746 (2000-01-01), Oh
patent: 6111808 (2000-08-01), Khang et al.
patent: 6721223 (2004-04-01), Matsumoto et al.

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