发明授权
- 专利标题: Circuit for cancelling and replacing redundant elements
- 专利标题(中): 用于取消和更换冗余元件的电路
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申请号: US09133714申请日: 1998-08-13
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公开(公告)号: US06208568B1公开(公告)日: 2001-03-27
- 发明人: Paul S. Zagar , Adrian E. Ong
- 申请人: Paul S. Zagar , Adrian E. Ong
- 主分类号: G11C1300
- IPC分类号: G11C1300
摘要:
In an integrated circuit having addressable primary elements and redundant elements which can be programmed to replace primary elements, a circuit and method are provided for cancelling and replacing redundant elements. A circuit is described which can be used in a memory such as a dynamic random access memory (DRAM) which uses a selectively blowable anti-fuse to disable a redundant element which was previously programmed to replace a defective primary element. The disclosure describes a method for permanently cancelling the defective redundant element and replacing the defective redundant element with another redundant element.
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