发明公开
EP0505189A2 Switching state detecting apparatus, control unit and transmission unit
失效
Steuereinheit unddazugehörigerSchaltzustandsdetektor。
- 专利标题： Switching state detecting apparatus, control unit and transmission unit
- 专利标题（中）： Steuereinheit unddazugehörigerSchaltzustandsdetektor。
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申请号： EP92302388.1申请日： 1992-03-19
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公开(公告)号： EP0505189A2公开(公告)日： 1992-09-23
- 发明人: Kobayashi, Ryoichi , Sugiura, Noboru
- 申请人： HITACHI, LTD.
- 申请人地址： 6, Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 100 JP
- 专利权人： HITACHI, LTD.
- 当前专利权人： HITACHI, LTD.
- 当前专利权人地址： 6, Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 100 JP
- 代理机构： Molyneaux, Martyn William
- 优先权： JP54347/91 19910319
- 主分类号： H03K5/01
- IPC分类号： H03K5/01
摘要：
A switching state detecting apparatus capable of preventing output voltage hunting caused by mechanical switch contacts bouncing when changing state and creating voltage fluctuation (chatter) comprises a passive filter (510) connected to the switches (S1 - Sn) and a comparator (507) for comparing the output value of the RC filter with a threshold level to then output a voltage value. The comparator changes the threshold level when the output voltage of the comparator is inverted, thereby preventing the apparatus from hunting. The output of the comparator is potentially divided and the divided output potential is superposed onto an initial threshold level to provide a second threshold level exceeding the voltage chatter level of said switches.
公开/授权文献
- EP0505189B1 Control unit 公开/授权日：1998-05-06
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