发明授权
- 专利标题: Single event upset hardened latch
- 专利标题(中): 单个事件镦粗硬化闩锁
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申请号: US09472000申请日: 1999-12-23
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公开(公告)号: US06696873B2公开(公告)日: 2004-02-24
- 发明人: Peter Hazucha , Krishnamurthy Soumyanath
- 申请人: Peter Hazucha , Krishnamurthy Soumyanath
- 主分类号: H03K3289
- IPC分类号: H03K3289
摘要:
A hardened latch capable of providing protection against single event upsets (SEUs) is disclosed. The hardened latch includes a first latch and a second latch that mirrors a subset of gates of the first latch. The second latch is inserted in the feedback path of the keeper circuit of the first latch and is cross-coupled with the gates of the keeper circuit of the first latch. The latch is hardened against single event upsets and an arbitrary number of successive SEUs attacking a single node, provided that the time between successive SEUs is larger than the recovery time of the latch. An alternate embodiment of the hardened latch includes a split buffer output. This embodiment is capable of reducing the propagation of erroneous transients. Another alternate embodiment of the hardened latch includes a Miller C buffer output. This embodiment is capable of reducing the propagation of erroneous transients below the level achievable in a hardened latch employing a split buffer output.
公开/授权文献
- US20010054923A1 SINGLE EVEENT UPSET HARDENED LATCH 公开/授权日:2001-12-27