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公开(公告)号:US06469937B2
公开(公告)日:2002-10-22
申请号:US10040788
申请日:2002-01-09
申请人: Ikuo Fuchigami , Tomonori Kataoka , Youichi Nishida , Tomoo Kimura , Jyunji Michiyama , Satoshi Kohtaka
发明人: Ikuo Fuchigami , Tomonori Kataoka , Youichi Nishida , Tomoo Kimura , Jyunji Michiyama , Satoshi Kohtaka
IPC分类号: G11C1606
CPC分类号: G11C11/5642 , G11C7/06 , G11C7/062 , G11C7/067 , G11C11/56 , G11C11/5621 , G11C16/28 , G11C2207/063 , G11C2211/5634
摘要: A current sense amplifier circuit is provided with a reference current generator for generating a reference current according to the characteristics of a memory cell, and a current comparator, and the current comparator compares the memory cell current with the reference current. Thereby, the range of the operating power supply voltage is increased. Further, a current sense amplifier circuit is provided with plural sets of reference current generators and current comparators, and the reference current generators generate reference currents of different amounts corresponding to plural states the memory cell can take, and the current comparators compare the respective reference currents with the memory cell current. Therefore, it is possible to detect the current in the memory cell that is set in multiple states.
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公开(公告)号:US06351416B2
公开(公告)日:2002-02-26
申请号:US09796806
申请日:2001-03-02
申请人: Ikuo Fuchigami , Tomonori Kataoka , Youichi Nishida , Tomoo Kimura , Jyunji Michiyama , Satoshi Kohtaka
发明人: Ikuo Fuchigami , Tomonori Kataoka , Youichi Nishida , Tomoo Kimura , Jyunji Michiyama , Satoshi Kohtaka
IPC分类号: G11C1606
CPC分类号: G11C11/5642 , G11C7/06 , G11C7/062 , G11C7/067 , G11C11/56 , G11C11/5621 , G11C16/28 , G11C2207/063 , G11C2211/5634
摘要: A current sense amplifier circuit is provided with a reference current generator for generating a reference current according to the characteristics of a memory cell, and a current comparator, and the current comparator compares the memory cell current with the reference current. Thereby, the range of the operating power supply voltage is increased. Further, a current sense amplifier circuit is provided with plural sets of reference current generators and current comparators, and the reference current generators generate reference currents of different amounts corresponding to plural states the memory cell can take, and the current comparators compare the respective reference currents with the memory cell current. Therefore, it is possible to detect the current in the memory cell that is set in multiple states.
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