发明授权
US5953191A Protection circuit against electrostatic charge applied between power
supply terminals for preventing internal circuit therefrom regardless
of polarity thereof
失效
防止电源端子之间施加的静电电荷的保护电路，用于防止其内部电路，而不管其极性如何
- 专利标题： Protection circuit against electrostatic charge applied between power supply terminals for preventing internal circuit therefrom regardless of polarity thereof
- 专利标题（中）： 防止电源端子之间施加的静电电荷的保护电路，用于防止其内部电路，而不管其极性如何
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申请号： US16636申请日： 1998-01-30
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公开(公告)号： US5953191A公开(公告)日： 1999-09-14
- 发明人: Kaoru Narita
- 申请人： Kaoru Narita
- 申请人地址： JPX Tokyo
- 专利权人： NEC Corporation
- 当前专利权人： NEC Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX9-018246 19970131
- 主分类号： H01L27/04
- IPC分类号： H01L27/04 ; H01L21/822 ; H01L21/8238 ; H01L27/02 ; H01L27/06 ; H01L27/092 ; H02H9/00
摘要：
Voltage clamping elements are respectively paired with first diodes, and the pairs of voltage clamping elements/first diodes are connected between a first common discharge line and power terminals selectively supplied with positive power voltage and ground voltage; however, the pairs of voltage clamping elements/first diodes can not prevent an internal circuit from excess voltage if a positive electrostatic pulse with respect to the positive power voltage is applied to the ground terminal; second diodes are connected between a second common discharge line and the terminals in such a manner as to discharge the positive electrostatic pulse through the associated forward-biased second diodes, and the internal circuit is perfectly prevented from the excess voltage.
公开/授权文献
- USD359968S Cutting element for wire saw 公开/授权日：1995-07-04
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