发明授权
- 专利标题： Overcurrent protection circuit for line circuits in a switching system
- 专利标题（中）： 交流系统中线路电路的过流保护电路
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申请号： US750164申请日： 1985-06-28
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公开(公告)号： US4661879A公开(公告)日： 1987-04-28
- 发明人: Kazuhiro Sato , Hiroyoshi Mori
- 申请人： Kazuhiro Sato , Hiroyoshi Mori
- 申请人地址： JPX Kanagawa
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kanagawa
- 优先权： JPX59-137966 19840705; JPX59-140921 19840706; JPX59-140922 19840706
- 主分类号： H02H9/02
- IPC分类号： H02H9/02
摘要：
An overcurrent protection circuit including a first transistor, a second transistor, and an integrator. The first transistor operates to control a current flow from a power source to a load. The second transistor is turned on when an overcurrent flows through the first transistor. The overcurrent is detected by watching the collector-emitter voltage of the first transistor. Thus, the second transistor operates to bypass the base current to be supplied to the first transistor with a certain delay time defined by a delay part, which enables an instantaneous overcurrent to be ignored.
公开/授权文献
- US5878343A Telecommunications systems arrangement 公开/授权日：1999-03-02
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