CAPACITIVE PROXIMITY DEVICE AND ELECTRONIC DEVICE COMPRISING THE CAPACITIVE PROXIMITY DEVICE
    1.
    发明申请
    CAPACITIVE PROXIMITY DEVICE AND ELECTRONIC DEVICE COMPRISING THE CAPACITIVE PROXIMITY DEVICE 审中-公开
    包含电容式接近装置的电容式近端装置和电子装置

    公开(公告)号:WO2009150618A2

    公开(公告)日:2009-12-17

    申请号:PCT/IB2009/052469

    申请日:2009-06-10

    CPC classification number: G01N27/221 G01R27/2605 H03K17/955 H03K2217/960775

    Abstract: The invention relates to a capacitive proximity device (30, 40, 50, 60) for sensing a presence and/or absence of an object (32) in the proximity of an electronic device (34). The capacitive proximity device (30, 40, 50, 60) comprises: an emission electrode (TA) capacitively coupled to a receiver electrode (), an oscillator (17) for generating an emission-signal (ES) being an alternating electric field () between the emission electrode (TA) and the receiving electrode (), and a sensing circuit (70, 72, 74, 76, 78) connected to the receiving electrode (). The sensing circuit receives a measured-signal (MS) from the receiver electrode (), and comprising a first synchronous detection circuit () together with a low-pass filter (14) for generating an output- signal (OS) being proportional to a distance between the object and the electronic device. The sensing circuit further comprising noise-suppression means for reducing noise from the measured-signal (MS) before entering the first synchronous detection circuit. The inventors have found that additional noise-suppression techniques are required when applying the known capacitive sensors in a electronic device.

    Abstract translation: 本发明涉及用于感测电子设备(34)附近的物体(32)的存在和/或不存在的电容式接近装置(30,40,50,60)。 电容式接近装置(30,40,50,60)包括:电容耦合到接收器电极()的发射电极(TA),用于产生作为交变电场的发射信号(ES)的振荡器(17) )和与接收电极()连接的感测电路(70,72,74,76,78)。 感测电路从接收器电极()接收测量信号(MS),并且包括与低通滤波器(14)一起的第一同步检测电路(),用于产生与a比例成比例的输出信号(OS) 物体与电子设备之间的距离。 感测电路还包括噪声抑制装置,用于在进入第一同步检测电路之前降低来自测量信号(MS)的噪声。 本发明人已经发现,当将已知的电容式传感器应用于电子设备时,需要额外的噪声抑制技术。

    CAPACITIVE PROXIMITY DEVICE AND ELECTRONIC DEVICE COMPRISING THE CAPACITIVE PROXIMITY DEVICE
    2.
    发明申请
    CAPACITIVE PROXIMITY DEVICE AND ELECTRONIC DEVICE COMPRISING THE CAPACITIVE PROXIMITY DEVICE 审中-公开
    包含电容式接近装置的电容式近端装置和电子装置

    公开(公告)号:WO2009150618A3

    公开(公告)日:2010-04-22

    申请号:PCT/IB2009052469

    申请日:2009-06-10

    CPC classification number: G01N27/221 G01R27/2605 H03K17/955 H03K2217/960775

    Abstract: The invention relates to a capacitive proximity device (30, 40, 50, 60) for sensing a presence and/or absence of an object (32) in the proximity of an electronic device (34). The capacitive proximity device (30, 40, 50, 60) comprises: an emission electrode (TA) capacitively coupled to a receiver electrode (), an oscillator (17) for generating an emission-signal (ES) being an alternating electric field () between the emission electrode (TA) and the receiving electrode (), and a sensing circuit (70, 72, 74, 76, 78) connected to the receiving electrode (). The sensing circuit receives a measured-signal (MS) from the receiver electrode (), and comprising a first synchronous detection circuit () together with a low-pass filter (14) for generating an output- signal (OS) being proportional to a distance between the object and the electronic device. The sensing circuit further comprising noise-suppression means for reducing noise from the measured-signal (MS) before entering the first synchronous detection circuit. The inventors have found that additional noise-suppression techniques are required when applying the known capacitive sensors in a electronic device.

    Abstract translation: 本发明涉及用于感测电子设备(34)附近的物体(32)的存在和/或不存在的电容式接近装置(30,40,50,60)。 电容式接近装置(30,40,50,60)包括:电容耦合到接收器电极()的发射电极(TA),用于产生作为交变电场的发射信号(ES)的振荡器(17) )和与接收电极()连接的感测电路(70,72,74,76,78)。 感测电路从接收器电极()接收测量信号(MS),并且包括与低通滤波器(14)一起的第一同步检测电路(),用于产生与a比例成比例的输出信号(OS) 物体与电子设备之间的距离。 感测电路还包括噪声抑制装置,用于在进入第一同步检测电路之前降低来自测量信号(MS)的噪声。 本发明人已经发现,当将已知的电容式传感器应用于电子设备时,需要额外的噪声抑制技术。

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