发明授权
- 专利标题： Load connection state detection circuit
- 专利标题（中）： 负载连接状态检测电路
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申请号： US13735916申请日： 2013-01-07
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公开(公告)号： US08901918B2公开(公告)日： 2014-12-02
- 发明人: Takashi Maruyama
- 申请人： ALPS Electric Co., Ltd.
- 申请人地址： JP Tokyo
- 专利权人： ALPS Electric Co., Ltd.
- 当前专利权人： ALPS Electric Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Beyer Law Group LLP
- 优先权： JP2012-028586 20120213
- 主分类号： G01R1/30
- IPC分类号： G01R1/30 ; G01R1/20 ; G01R31/04
摘要：
This load connection state detection circuit includes a PNP type transistor whose emitter is connected to a power source terminal, a NPN type transistor where the emitter thereof is connected to the power source terminal, the collector thereof is connected to the base of the PNP type transistor, and the base thereof is connected to the collector of the PNP type transistor, and a diode inserted between the collector of the PNP type transistor and an external antenna load, wherein the diode is configured to perform temperature compensation for the base voltage of the NPN type transistor and prevent currents from flowing from the external antenna load to the PNP type transistor and the NPN type transistor.
公开/授权文献
- US20130207642A1 LOAD CONNECTION STATE DETECTION CIRCUIT 公开/授权日：2013-08-15
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