Invention Grant
- Patent Title: Semiconductor memory device and control method thereof
- Patent Title (中): 半导体存储器件及其控制方法
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Application No.: US12177650Application Date: 2008-07-22
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Publication No.: US07995407B2Publication Date: 2011-08-09
- Inventor: Yasuhiko Maki
- Applicant: Yasuhiko Maki
- Applicant Address: JP Yokohama
- Assignee: Fujitsu Semiconductor Limited
- Current Assignee: Fujitsu Semiconductor Limited
- Current Assignee Address: JP Yokohama
- Agency: Arent Fox LLP
- Priority: JP2007-212999 20070817
- Main IPC: G11C29/00
- IPC: G11C29/00

Abstract:
A semiconductor memory device comprising a regular cell array that includes a regular memory cell to which one of a first power supply voltage and a second power supply voltage is supplied and to which a third power supply voltage is supplied, a redundant cell array that includes a redundant memory cell to which one of the first power supply voltage and the second power supply voltage is supplied and to which the third power supply voltage is supplied, and a power supply control circuit that controls supply of the first power supply voltage and the second power supply voltage to the regular cell array and the redundant cell array, wherein a difference between the second power supply voltage and the third power supply voltage is smaller than a difference between the first power supply voltage and the third power supply voltage.
Public/Granted literature
- US20090046523A1 SEMICONDUCTOR MEMORY DEVICE AND CONTROL METHOD THEREOF Public/Granted day:2009-02-19
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