发明授权
US06344809B1 Line interface circuit and information communication apparatus using it
有权
线路接口电路和使用它的信息通信设备
- 专利标题： Line interface circuit and information communication apparatus using it
- 专利标题（中）： 线路接口电路和使用它的信息通信设备
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申请号： US09704687申请日： 2000-11-03
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公开(公告)号： US06344809B1公开(公告)日： 2002-02-05
- 发明人: Nobuyasu Kanekawa , Yasuyuki Kojima , Seigou Yukutake , Minehiro Nemoto , Kazuhisa Takami , Takayuki Iwasaki , Yusuke Takeuchi , Yasuo Shima
- 申请人： Nobuyasu Kanekawa , Yasuyuki Kojima , Seigou Yukutake , Minehiro Nemoto , Kazuhisa Takami , Takayuki Iwasaki , Yusuke Takeuchi , Yasuo Shima
- 优先权： JP12-134188 20000428
- 主分类号： H03M900
- IPC分类号： H03M900
摘要：
In order to reduce the consumption of power of an isolator interface and an ADC, it is proposed to operate a calling signal reception or Caller ID signal reception function only with power supplied from the system switch while maintaining the on-hook condition of a telephone. At the time of normal operation, the output of the analogue digital converter is input to an isolator through the isolator interface, and at the time of the calling signal reception or the caller identification information reception, the output of the analogue digital converter is input directly to the isolator.
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