公开(公告)号：US5736980A

公开(公告)日：1998-04-07

申请号：US421358

申请日：1995-04-13

申请人： Shigeki Iguchi ,  Katsumi Hirano ,  Tomohiko Nishimura ,  Kunio Hiromoto ,  Kazuyoshi Nomiya

发明人： Shigeki Iguchi ,  Katsumi Hirano ,  Tomohiko Nishimura ,  Kunio Hiromoto ,  Kazuyoshi Nomiya

IPC分类号： G06F3/0354 ,  G06F3/041 ,  G06F3/033

CPC分类号： G06F3/0412 ,  G06F3/03545

摘要： A coordinate inputting apparatus has a separating circuit, a cable and a position indicating pen. The separating circuit has a low pass filter for removing an alternating current component from a signal transmitted to a signal line and a band pass filter for passing only a position information signal in a predetermined frequency band with respect to the signal transmitted to the signal line. The cable is constructed by a signal line, a switching signal line and a ground line. The signal line is used to supply power to the position indicating pen and transmit a detecting signal from the position indicating pen to each of an X-coordinate detecting circuit and a Y-coordinate detecting circuit. The position indicating pen has a low pass filter for removing an alternating current component from a signal transmitted through the signal line and a band pass filter for passing only a position information signal in a predetermined frequency band. A signal transmitting system of this coordinate inputting apparatus and other coordinate inputting apparatuses are also shown.

摘要翻译： 坐标输入装置具有分离电路，电缆和位置指示笔。 分离电路具有用于从发送到信号线的信号中去除交流分量的低通滤波器和用于相对于传输到信号线的信号仅通过预定频带中的位置信息信号的带通滤波器。 电缆由信号线，开关信号线和接地线构成。 信号线用于向位置指示笔供电，并将检测信号从位置指示笔发送到X坐标检测电路和Y坐标检测电路中的每一个。 位置指示笔具有用于从通过信号线传输的信号中去除交流分量的低通滤波器和用于仅通过预定频带中的位置信息信号的带通滤波器。 还示出了该坐标输入装置的信号发送系统和其他坐标输入装置。