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1. 发明授权

US09244569B2 Capacitive sensing analog front end 有权
标题翻译：电容式感应模拟前端
公开(公告)号：US09244569B2
公开(公告)日：2016-01-26
申请号：US12972159
申请日：2010-12-17
申请人： Yannick Guedon , Kien Beng Tan , Kusuma Adi Ningrat , Dianbo Guo
发明人： Yannick Guedon , Kien Beng Tan , Kusuma Adi Ningrat , Dianbo Guo
IPC分类号： G06F3/045 , G06F3/044
CPC分类号： G06F3/044
摘要： A capacitive sensing analog front end for a touchscreen system having an improved signal-to-noise ratio includes a capacitance-to-voltage converter having an input for coupling to an external sampling capacitor, a summer having a first input coupled to an output of the capacitance-to-voltage converter, a low pass filter having an input coupled to an output of the summer and an output for providing an output signal; and a sample-and-hold circuit having an input coupled to the output of the low pass filter and an output coupled to a second input of the summer. The signal-to-noise ratio of the touchscreen system is improved by extracting the DC shift of a touch signal during a monitoring period and then subtracting the DC shift before integrating the touch signal.
摘要翻译：具有改进的信噪比的用于触摸屏系统的电容感测模拟前端包括具有用于耦合到外部采样电容器的输入的电容 - 电压转换器，具有耦合到所述外部采样电容器的输出的第一输入的加法器电容 - 电压转换器，具有耦合到所述加法器的输出的输入端的低通滤波器和用于提供输出信号的输出; 以及采样保持电路，其具有耦合到所述低通滤波器的输出的输入和耦合到所述夏季的第二输入的输出。通过在监视期间提取触摸信号的直流偏移，然后在积分触摸信号之前减去直流偏移，来提高触摸屏系统的信噪比。

2. 发明申请

US20110242048A1 CAPACITIVE SENSING ANALOG FRONT END 有权
标题翻译：电容感测模拟前端
公开(公告)号：US20110242048A1
公开(公告)日：2011-10-06
申请号：US12972159
申请日：2010-12-17
申请人： Yannick GUEDON , Kien Beng Tan , Kusuma Adi Ningrat , Dianbo Guo
发明人： Yannick GUEDON , Kien Beng Tan , Kusuma Adi Ningrat , Dianbo Guo
IPC分类号： G06F3/045
CPC分类号： G06F3/044
摘要： A capacitive sensing analog front end for a touchscreen system having an improved signal-to-noise ratio includes a capacitance-to-voltage converter having an input for coupling to an external sampling capacitor, a summer having a first input coupled to an output of the capacitance-to-voltage converter, a low pass filter having an input coupled to an output of the summer and an output for providing an output signal; and a sample-and-hold circuit having an input coupled to the output of the low pass filter and an output coupled to a second input of the summer. The signal-to-noise ratio of the touchscreen system is improved by extracting the DC shift of a touch signal during a monitoring period and then subtracting the DC shift before integrating the touch signal.
摘要翻译：具有改进的信噪比的用于触摸屏系统的电容感测模拟前端包括具有用于耦合到外部采样电容器的输入的电容 - 电压转换器，具有耦合到所述外部采样电容器的输出的第一输入的加法器电容 - 电压转换器，具有耦合到所述加法器的输出的输入端的低通滤波器和用于提供输出信号的输出; 以及采样保持电路，其具有耦合到所述低通滤波器的输出的输入和耦合到所述夏季的第二输入的输出。通过在监视期间提取触摸信号的直流偏移，然后在积分触摸信号之前减去直流偏移，来提高触摸屏系统的信噪比。

3. 发明申请

US20150145801A1 HIGH SIGNAL TO NOISE RATIO CAPACITIVE SENSING ANALOG FRONT-END 有权
标题翻译：高信号噪声比电容式传感模拟前端
公开(公告)号：US20150145801A1
公开(公告)日：2015-05-28
申请号：US13619328
申请日：2012-09-14
申请人： Paolo Angelini , Giovanni Carlo Tripoli , Ernesto Lasalandra , Tommaso Ungaretti , Kien Beng Tan , Yannick Guedon , Dianbo Guo , Sze-Kwang Tan
发明人： Paolo Angelini , Giovanni Carlo Tripoli , Ernesto Lasalandra , Tommaso Ungaretti , Kien Beng Tan , Yannick Guedon , Dianbo Guo , Sze-Kwang Tan
IPC分类号： G06F3/044
CPC分类号： G06F3/044 , G06F3/0416
摘要： Capacitance sensing circuits and methods are provided. The capacitance sensing circuit includes a capacitance-to-voltage converter configured to receive a signal from a capacitance to be sensed and to provide an output signal representative of the capacitance, an output chopper configured to convert the output signal of the capacitance-to-voltage converter to a sensed voltage representative of the capacitance to be sensed, an analog accumulator configured to accumulate sensed voltages during an accumulation period of NA sensing cycles and to provide an accumulated analog value, an amplifier configured to amplify the accumulated analog value, and an analog-to-digital converter configured to convert the amplified accumulated analog value to a digital value representative of the capacitance to be sensed. The analog accumulator may include a low pass filter having a frequency response to filter wideband noise.
摘要翻译：提供电容感测电路和方法。电容感测电路包括：电容 - 电压转换器，被配置为从要感测的电容接收信号并提供表示电容的输出信号;输出斩波器，被配置为转换电容 - 电压的输出信号转换器到感测的电压，代表要感测的电容;模拟累加器，被配置为在NA感测周期的累积周期期间累积感测电压并提供累加的模拟值，被配置为放大所累积的模拟值的放大器和模拟配置为将放大的累积模拟值转换为表示要感测的电容的数字值。模拟累加器可以包括具有对滤波器宽带噪声的频率响应的低通滤波器。

4. 发明授权

US09128573B2 High signal to noise ratio capacitive sensing analog front-end 有权
标题翻译：高信噪比电容式感应模拟前端
公开(公告)号：US09128573B2
公开(公告)日：2015-09-08
申请号：US13619328
申请日：2012-09-14
申请人： Paolo Angelini , Giovanni Carlo Tripoli , Ernesto Lasalandra , Tommaso Ungaretti , Kien Beng Tan , Yannick Guedon , Dianbo Guo , Sze-Kwang Tan
发明人： Paolo Angelini , Giovanni Carlo Tripoli , Ernesto Lasalandra , Tommaso Ungaretti , Kien Beng Tan , Yannick Guedon , Dianbo Guo , Sze-Kwang Tan
IPC分类号： G06F3/044
CPC分类号： G06F3/044 , G06F3/0416
摘要： Capacitance sensing circuits and methods are provided. The capacitance sensing circuit includes a capacitance-to-voltage converter configured to receive a signal from a capacitance to be sensed and to provide an output signal representative of the capacitance, an output chopper configured to convert the output signal of the capacitance-to-voltage converter to a sensed voltage representative of the capacitance to be sensed, an analog accumulator configured to accumulate sensed voltages during an accumulation period of NA sensing cycles and to provide an accumulated analog value, an amplifier configured to amplify the accumulated analog value, and an analog-to-digital converter configured to convert the amplified accumulated analog value to a digital value representative of the capacitance to be sensed. The analog accumulator may include a low pass filter having a frequency response to filter wideband noise.
摘要翻译：提供电容感测电路和方法。电容感测电路包括：电容 - 电压转换器，被配置为从要感测的电容接收信号并提供表示电容的输出信号;输出斩波器，被配置为转换电容 - 电压的输出信号转换器到感测的电压，代表要感测的电容;模拟累加器，被配置为在NA感测周期的累积周期期间累积感测电压并提供累加的模拟值，被配置为放大所累积的模拟值的放大器和模拟配置为将放大的累积模拟值转换为表示要感测的电容的数字值。模拟累加器可以包括具有对滤波器宽带噪声的频率响应的低通滤波器。

5. 发明授权

US08344928B2 Method and apparatus for capacitance sensing 有权
标题翻译：电容检测方法和装置
公开(公告)号：US08344928B2
公开(公告)日：2013-01-01
申请号：US12943241
申请日：2010-11-10
申请人： Yannick Guedon , Kien Beng Tan
发明人： Yannick Guedon , Kien Beng Tan
IPC分类号： H03M1/12
CPC分类号： H03M3/356 , H03K17/962 , H03M3/43 , H03M3/456
摘要： A capacitance-to-digital converter for an extended range of capacitances includes a reference capacitor and one or more offset capacitors. Electrical charge accumulated in the offset capacitors is used to at least partially cancel the charge accumulated in a sensed capacitance to facilitate matching with a charge accumulated in the reference capacitor. The residual charge is passed to an integrator, the output from which is quantized and used to control switching of the capacitors. Immunity to tonal external noises and improved conversion speed are achieved by controlling the capacitor switching with a spread spectrum clock. The capacitance-to-digital converter may be used, for example, for sensing of the capacitances of capacitive elements in touch and proximity displays or other user interfaces.
摘要翻译：用于扩展电容范围的电容数字转换器包括参考电容器和一个或多个失调电容器。积分在偏移电容器中的电荷用于至少部分地消除在感测电容中累积的电荷，以便于与参考电容器中累积的电荷匹配。剩余电荷被传递到积分器，其输出被量化并用于控制电容器的开关。通过用扩频时钟控制电容器切换，实现对音调外部噪声和转换速度的提高。电容数字转换器可以用于例如感测触摸和接近显示器或其他用户接口中的电容元件的电容。

6. 发明申请

US20120112817A1 METHOD AND APPARATUS FOR CAPACITANCE SENSING 有权
标题翻译：电容传感的方法和装置
公开(公告)号：US20120112817A1
公开(公告)日：2012-05-10
申请号：US12943241
申请日：2010-11-10
申请人： Yannick Guedon , Kien Beng Tan
发明人： Yannick Guedon , Kien Beng Tan
IPC分类号： H03K17/945 , H03M1/12
CPC分类号： H03M3/356 , H03K17/962 , H03M3/43 , H03M3/456
摘要： A capacitance-to-digital converter for an extended range of capacitances includes a reference capacitor and one or more offset capacitors. Electrical charge accumulated in the offset capacitors is used to at least partially cancel the charge accumulated in a sensed capacitance to facilitate matching with a charge accumulated in the reference capacitor. The residual charge is passed to an integrator, the output from which is quantized and used to control switching of the capacitors. Immunity to tonal external noises and improved conversion speed are achieved by controlling the capacitor switching with a spread spectrum clock. The capacitance-to-digital converter may be used, for example, for sensing of the capacitances of capacitive elements in touch and proximity displays or other user interfaces.
摘要翻译：用于扩展电容范围的电容数字转换器包括参考电容器和一个或多个失调电容器。积分在偏移电容器中的电荷用于至少部分地消除在感测电容中累积的电荷，以便于与参考电容器中累积的电荷匹配。剩余电荷被传递到积分器，其输出被量化并用于控制电容器的开关。通过用扩频时钟控制电容器切换，实现对音调外部噪声和转换速度的提高。电容数字转换器可以用于例如感测触摸和接近显示器或其他用户接口中的电容元件的电容。

7. 发明授权

US09019229B2 Sample and hold capacitance to digital converter 有权
标题翻译：数字转换器的采样和保持电容
公开(公告)号：US09019229B2
公开(公告)日：2015-04-28
申请号：US12732581
申请日：2010-03-26
申请人： Yannick Guedon , Kien Beng Tan
发明人： Yannick Guedon , Kien Beng Tan
IPC分类号： G06F3/044 , H03M11/20 , G06F3/041 , H03M3/00
CPC分类号： H03M11/20 , G06F3/0416 , G06F3/044 , H03K2217/960725 , H03M3/43
摘要： A circuit for converting charge measured from a touch screen into a digital signal can include a sample and hold circuit. The sample and hold circuit can sample and integrate a charge from a capacitive sense matrix, and hold a voltage signal representing the measured charge. A sigma delta converter can convert the voltage into a digital value.
摘要翻译：用于将从触摸屏测量的电荷转换为数字信号的电路可以包括采样和保持电路。采样和保持电路可以对来自电容检测矩阵的电荷进行采样和积分，并保持表示测量电荷的电压信号。 Σ-Δ转换器可将电压转换为数字值。

8. 发明申请

US20110234528A1 SAMPLE AND HOLD CAPACITANCE TO DIGITAL CONVERTER 有权
标题翻译：样品和保持数字转换器的电容
公开(公告)号：US20110234528A1
公开(公告)日：2011-09-29
申请号：US12732581
申请日：2010-03-26
申请人： Yannick Guedon , Kien Beng Tan
发明人： Yannick Guedon , Kien Beng Tan
IPC分类号： G06F3/045 , H03M1/12
CPC分类号： H03M11/20 , G06F3/0416 , G06F3/044 , H03K2217/960725 , H03M3/43
摘要： A circuit for converting charge measured from a touch screen into a digital signal can include a sample and hold circuit. The sample and hold circuit can sample and integrate a charge from a capacitive sense matrix, and hold a voltage signal representing the measured charge. A sigma delta converter can convert the voltage into a digital value.
摘要翻译：用于将从触摸屏测量的电荷转换为数字信号的电路可以包括采样和保持电路。采样和保持电路可以对来自电容检测矩阵的电荷进行采样和积分，并保持表示测量电荷的电压信号。 Σ-Δ转换器可将电压转换为数字值。

9. 发明申请

US20110133810A1 System and Method for a Semiconductor Switch 有权
标题翻译：半导体开关的系统和方法
公开(公告)号：US20110133810A1
公开(公告)日：2011-06-09
申请号：US12633597
申请日：2009-12-08
申请人： Dianbo Guo , Eng Jye Ng , Kien Beng Tan
发明人： Dianbo Guo , Eng Jye Ng , Kien Beng Tan
IPC分类号： H03L5/00
CPC分类号： H03K17/164
摘要： In one embodiment, a semiconductor circuit for coupling a first node to a second node includes a first transistor having a first terminal coupled to the first node, a second terminal coupled to the second node, and a control terminal coupled to a control node. The circuit also includes a level shifting circuit having a series diode for coupling a bulk terminal of the first transistor to the control node, and a supply coupling circuit coupled between a first power supply node and the control node.
摘要翻译：在一个实施例中，用于将第一节点耦合到第二节点的半导体电路包括具有耦合到第一节点的第一终端的第一晶体管，耦合到第二节点的第二终端以及耦合到控制节点的控制终端。电路还包括具有用于将第一晶体管的体端子耦合到控制节点的串联二极管的电平移动电路和耦合在第一电源节点和控制节点之间的电源耦合电路。

10. 发明授权

US08004340B2 System and method for a semiconductor switch 有权
标题翻译：半导体开关的系统和方法
公开(公告)号：US08004340B2
公开(公告)日：2011-08-23
申请号：US12633597
申请日：2009-12-08
申请人： Dianbo Guo , Eng Jye Ng , Kien Beng Tan
发明人： Dianbo Guo , Eng Jye Ng , Kien Beng Tan
IPC分类号： H03L5/00
CPC分类号： H03K17/164
摘要： In one embodiment, a semiconductor circuit for coupling a first node to a second node includes a first transistor having a first terminal coupled to the first node, a second terminal coupled to the second node, and a control terminal coupled to a control node. The circuit also includes a level shifting circuit having a series diode for coupling a bulk terminal of the first transistor to the control node, and a supply coupling circuit coupled between a first power supply node and the control node.
摘要翻译：在一个实施例中，用于将第一节点耦合到第二节点的半导体电路包括具有耦合到第一节点的第一终端的第一晶体管，耦合到第二节点的第二终端以及耦合到控制节点的控制终端。电路还包括具有用于将第一晶体管的体端子耦合到控制节点的串联二极管的电平移动电路和耦合在第一电源节点和控制节点之间的电源耦合电路。

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