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    Keypad with 1-bit capacitive touch sensing analog front end with sparse multi-touch detection
    5.
    发明授权
    Keypad with 1-bit capacitive touch sensing analog front end with sparse multi-touch detection 有权
    键盘带有1位电容式触摸感应模拟前端，具有稀疏的多点触摸检测功能

    公开(公告)号：US09524069B2

    公开(公告)日：2016-12-20

    申请号：US14631837

    申请日：2015-02-25

    Applicant: Texas Instruments Incorporated

    Inventor： Chenchi Luo

    IPC: G06F3/044

    CPC classification number: G06F3/044 ,  H03K17/9622 ,  H03K2217/960725 ,  H03M11/20

    Abstract: A capacitive touch keypad may receive a touch by a conductive object to one or more keys of the keypad, in which the keys each have a separate capacitive key electrode. The touched locations may be determined by precharging a pseudo-randomly selected set of key electrodes a number (M) of iterations while the keyboard is being touched, producing a sense voltage for each iteration by coupling all of the key electrodes to a reference capacitor, producing a 1-bit sense measurement for each iteration by comparing the sense voltage to a reference voltage to form a set of M 1-bit sense measurement, and by applying a modified binary iterative hard threshold (BIHT) algorithm to the set of M 1-bit sense measurements, in which only the non-zero locations of the solution are monitored in each iteration.

    Abstract translation: 电容式触摸键盘可以通过导电对象接收键盘的一个或多个键的触摸，其中键各具有单独的电容键电极。 触摸的位置可以通过在键盘被触摸时预先对伪随机选择的一组键电极进行迭代来确定，通过将所有的键电极耦合到参考电容器来产生用于每次迭代的感测电压， 通过将感测电压与参考电压进行比较来形成每一次迭代的1位感测测量，以形成一组M 1位检测测量，并且通过将修改的二进制迭代硬阈值（BIHT）算法应用于M 1的集合 在每次迭代中只监视解决方案的非零位置。

    Keypad with 1-bit Capacitive Touch Sensing Analog Front End with Sparse Multi-touch Detection
    7.
    发明申请
    Keypad with 1-bit Capacitive Touch Sensing Analog Front End with Sparse Multi-touch Detection 有权
    具有1位电容触摸感应模拟前端的键盘，具有稀疏的多点触摸检测

    公开(公告)号：US20160246407A1

    公开(公告)日：2016-08-25

    申请号：US14631837

    申请日：2015-02-25

    Applicant: Texas Instruments Incorporated

    Inventor： Chenchi Luo

    IPC: G06F3/044

    CPC classification number: G06F3/044 ,  H03K17/9622 ,  H03K2217/960725 ,  H03M11/20

    Abstract: A capacitive touch keypad may receive a touch by a conductive object to one or more keys of the keypad, in which the keys each have a separate capacitive key electrode. The touched locations may be determined by precharging a pseudo-randomly selected set of key electrodes a number (M) of iterations while the keyboard is being touched, producing a sense voltage for each iteration by coupling all of the key electrodes to a reference capacitor, producing a 1-bit sense measurement for each iteration by comparing the sense voltage to a reference voltage to form a set of M 1-bit sense measurement, and by applying a modified binary iterative hard threshold (BIHT) algorithm to the set of M 1-bit sense measurements, in which only the non-zero locations of the solution are monitored in each iteration.

    Abstract translation: 电容式触摸键盘可以通过导电对象接收键盘的一个或多个键的触摸，其中键各具有单独的电容键电极。 触摸的位置可以通过在键盘被触摸时预先对伪随机选择的一组键电极进行迭代来确定，通过将所有的键电极耦合到参考电容器来产生用于每次迭代的感测电压， 通过将感测电压与参考电压进行比较来形成每一次迭代的1位感测测量，以形成一组M 1位检测测量，并且通过将修改的二进制迭代硬阈值（BIHT）算法应用于M 1的集合 在每次迭代中只监视解决方案的非零位置。

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