Compensation circuit for a TX-RX capacitive sensor
    2.
    发明授权
    Compensation circuit for a TX-RX capacitive sensor 有权
    TX-RX电容式传感器的补偿电路

    公开(公告)号:US08890547B2

    公开(公告)日:2014-11-18

    申请号:US13345504

    申请日:2012-01-06

    IPC分类号: G06F3/044 G01R27/26

    CPC分类号: G01R27/2605 G06F3/044

    摘要: A capacitive sensor may include a transmit electrode and a receive electrode capacitively coupled with the transmit electrode. A capacitance sensing circuit senses a capacitance between the transmit and receive electrodes by applying a signal to the transmit electrode and rectifying a signal induced at the receive electrode. A compensation circuit reduces the effect of a mutual and parasitic capacitances of the transmit and receive electrode pair by adding a compensation signal to the rectified signal.

    摘要翻译: 电容传感器可以包括发射电极和与发射电极电容耦合的接收电极。 电容感测电路通过向发射电极施加信号并整流在接收电极处感应的信号来感测发射电极和接收电极之间的电容。 补偿电路通过向整流信号添加补偿信号来减小发射和接收电极对的相互和寄生电容的影响。

    Dynamic shield electrode of a stylus
    3.
    发明授权
    Dynamic shield electrode of a stylus 有权
    触针的动态屏蔽电极

    公开(公告)号:US08878823B1

    公开(公告)日:2014-11-04

    申请号:US13431425

    申请日:2012-03-27

    摘要: An apparatus comprising a stylus with a dynamically switch tip shield is provided. The apparatus includes an elongated stylus housing having an end, a conductive tip disposed at least partially inside the stylus housing and extending from the end, a force sensor coupled to the conductive tip and configured to detect contact between the conductive tip and an object, a tip shield coupled with the stylus housing and extending from the end, and a switch coupled to the tip shield and the conductive tip.

    摘要翻译: 提供一种包括具有动态切换尖端屏蔽的触笔的装置。 该装置包括细长的触针外壳,其具有端部,至少部分地设置在触针外壳内并且从端部延伸的导电尖端,连接到导电尖端并被配置为检测导电尖端和物体之间的接触的力传感器, 与触针壳体耦合并从端部延伸的尖端护罩,以及耦合到尖端护罩和导电尖端的开关。

    Capacitance to code converter with sigma-delta modulator
    4.
    发明授权
    Capacitance to code converter with sigma-delta modulator 有权
    具有Σ-Δ调制器的电容到码转换器

    公开(公告)号:US08547114B2

    公开(公告)日:2013-10-01

    申请号:US11600255

    申请日:2006-11-14

    申请人: Viktor Kremin

    发明人: Viktor Kremin

    IPC分类号: G01R27/26

    摘要: An apparatus and method for converting a capacitance measured on a sensor element to a digital code. The apparatus may include a switching capacitor as a sensor element of a sensing device, and a sigma-delta modulator coupled to the sensor element to convert a capacitance measured on the sensor element to a digital code. The switching capacitor is in a feedback loop of the sigma-delta modulator. The method may include measuring a capacitance on a sensor element of a sensing device using a sigma-delta modulator, and converting the capacitance measured on the sensor element to a digital code.

    摘要翻译: 一种用于将在传感器元件上测量的电容转换为数字码的装置和方法。 该装置可以包括作为感测装置的传感器元件的开关电容器和耦合到传感器元件的Σ-Δ调制器,以将在传感器元件上测量的电容转换为数字代码。 开关电容器处于Σ-Δ调制器的反馈回路中。 该方法可以包括使用Σ-Δ调制器测量感测装置的传感器元件上的电容,以及将在传感器元件上测量的电容转换为数字代码。

    Capacitance to frequency converter
    5.
    发明授权
    Capacitance to frequency converter 有权
    变频器电容

    公开(公告)号:US08536902B1

    公开(公告)日:2013-09-17

    申请号:US13301764

    申请日:2011-11-21

    IPC分类号: H03C3/00

    摘要: A capacitance to frequency converter includes a switching capacitor circuit, a charge dissipation circuit, a comparator, and a signal generator. The switching capacitor circuit charges a sensing capacitor and transfers charge from the sensing capacitor to a circuit node of the charge dissipation circuit. The comparator is coupled to the charge dissipation circuit to compare a potential at the circuit node to a reference voltage. The signal generator is coupled to an output of the comparator and to the charge dissipation circuit. The signal generator is responsive to the output of the comparator to generate a signal fed back to control the charge dissipation circuit. A frequency of the signal is proportional to a capacitance of the sensing capacitor.

    摘要翻译: 电容变频器包括开关电容器电路,电荷耗散电路,比较器和信号发生器。 开关电容器电路对感测电容器充电,并将电荷从感测电容器传送到电荷耗散电路的电路节点。 比较器耦合到电荷耗散电路以将电路节点处的电位与参考电压进行比较。 信号发生器耦合到比较器的输出端和电荷耗散电路。 信号发生器响应比较器的输出以产生反馈信号以控制电荷耗散电路。 信号的频率与感测电容器的电容成正比。

    Discerning between substances
    7.
    发明授权
    Discerning between substances 有权
    辨别物质

    公开(公告)号:US08245579B2

    公开(公告)日:2012-08-21

    申请号:US12262640

    申请日:2008-10-31

    IPC分类号: G01B7/16

    CPC分类号: G01D5/2405 H03K17/962

    摘要: A method and apparatus to detect the presence of a material at a sensing device and to determine whether the material is a first material having a first material property or a second material having a second material property.

    摘要翻译: 一种在感测装置处检测材料的存在并确定材料是否是具有第一材料性质的第一材料或具有第二材料性质的第二材料的方法和装置。

    Circuit for forming phase shifted signals for three phase BLDC motors
    8.
    发明授权
    Circuit for forming phase shifted signals for three phase BLDC motors 有权
    用于三相BLDC电机形成相移信号的电路

    公开(公告)号:US08217609B1

    公开(公告)日:2012-07-10

    申请号:US12723070

    申请日:2010-03-12

    IPC分类号: H02K23/00

    CPC分类号: H02P6/182 H02P2207/05

    摘要: Disclosed is a controller circuit, comprising a plurality of sense inputs, an instrumentation amplifier block having inputs coupled to the plurality of sense inputs, a filter block coupled to the instrumentation amplifier block, a sum function coupled to the filter block, and a crossing detector block coupled to the filter block and the sum function. A method of controlling motor signals is further described.

    摘要翻译: 公开了一种包括多个感测输入的控制器电路,具有耦合到多个感测输入的输入的仪表放大器模块,耦合到仪表放大器模块的滤波器模块,耦合到滤波器模块的和功能和交叉检测器 耦合到滤波器块和和函数的块。 进一步描述控制电动机信号的方法。

    Capacitive field sensor with sigma-delta modulator
    9.
    发明授权
    Capacitive field sensor with sigma-delta modulator 有权
    具有Σ-Δ调制器的电容场传感器

    公开(公告)号:US08089289B1

    公开(公告)日:2012-01-03

    申请号:US12167100

    申请日:2008-07-02

    IPC分类号: G01R27/26

    摘要: A capacitive sensor includes a switching capacitor circuit, a comparator, and a charge dissipation circuit. The switching capacitor circuit reciprocally couples a sensing capacitor in series with a modulation capacitor during a first switching phase and discharges the sensing capacitor during a second switching phase. The comparator is coupled to compare a voltage potential on the modulation capacitor to a reference and to generate a modulation signal in response. The charge dissipation circuit is coupled to the modulation capacitor to selectively discharge the modulation capacitor in response to the modulation signal.

    摘要翻译: 电容传感器包括开关电容器电路,比较器和电荷耗散电路。 开关电容器电路在第一开关阶段期间将感测电容器与调制电容器串联耦合,并且在第二开关阶段期间对感测电容器进行放电。 比较器被耦合以将调制电容器上的电压电位与参考电压进行比较,并且响应地产生调制信号。 电荷耗散电路耦合到调制电容器以响应于调制信号选择性地放电调制电容器。

    Circuit for forming phase shifted signals for three phase BLDC motor control
    10.
    发明授权
    Circuit for forming phase shifted signals for three phase BLDC motor control 有权
    用于形成用于三相BLDC电动机控制的相移信号的电路

    公开(公告)号:US07679302B1

    公开(公告)日:2010-03-16

    申请号:US11480036

    申请日:2006-06-29

    IPC分类号: H02P6/18

    CPC分类号: H02P6/182 H02P2207/05

    摘要: Disclosed is a controller circuit, comprising a plurality of sense inputs, an instrumentation amplifier block having inputs coupled to the plurality of sense inputs, a filter block coupled to the instrumentation amplifier block, a sum function coupled to the filter block, and a crossing detector block coupled to the filter block and the sum function. A method of controlling motor signals is further described.

    摘要翻译: 公开了一种包括多个感测输入的控制器电路,具有耦合到多个感测输入的输入的仪表放大器模块,耦合到仪表放大器模块的滤波器模块,耦合到滤波器模块的和功能和交叉检测器 耦合到滤波器块和和函数的块。 进一步描述控制电动机信号的方法。