Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

2007-08-07

2007-08-07

Tran, Micheal (Department: 2827)

Static information storage and retrieval

Powering

C365S230060

Reexamination Certificate

active

11274220

ABSTRACT:
A semiconductor memory device has: a word driver configured to apply a driving voltage to a word line connected to a memory cell; and an internal power supply circuit configured to supply the driving voltage to the word driver and to apply a substrate voltage to back gates of transistors included in the word driver. The internal power supply circuit controls the driving voltage and the substrate voltage independently of each other. In a read operation, the internal power supply circuit constantly supplies the substrate voltage, while turns on and off supply of the driving voltage.

REFERENCES:
patent: 6873561 (2005-03-01), Ooishi
patent: 2001/0024384 (2001-09-01), Arimoto et al.
patent: 2002/0130341 (2002-09-01), Horiguchi et al.
patent: 2004/0080481 (2004-04-01), Yamazaki et al.
patent: 7-169282 (1995-07-01), None
patent: 2000-113689 (2000-04-01), None

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