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公开(公告)号：US20140077823A1
公开(公告)日：2014-03-20
申请号：US13717780
申请日：2012-12-18
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： G01R27/26
CPC分类号： G01R27/2605 , G06F3/0418 , G06F3/044
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。
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公开(公告)号：US09389256B2
公开(公告)日：2016-07-12
申请号：US13717780
申请日：2012-12-18
发明人： Paolo Angelini , Giovanni Carlo Tripoli , Ernesto Lasalandra , Tommaso Ungaretti , Kien Beng Tan , Yannick Guedon , Dianbo Guo , Sze-Kwang Tan
CPC分类号： G01R27/2605 , G06F3/0418 , G06F3/044
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.
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公开(公告)号：US20180101266A1
公开(公告)日：2018-04-12
申请号：US15840438
申请日：2017-12-13
发明人： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
CPC分类号： G06F3/044 , G06F3/0414 , G06F3/0416 , G06F2203/04103 , G06F2203/04108
摘要： A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
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4.发明申请METHOD & CIRCUIT FOR PARASITIC CAPACITANCE CANCELLATION FOR SELF CAPACITANCE SENSING 有权用于自适应感测的PARASIIC电容消除的方法和电路公开(公告)号：US20140292705A1
公开(公告)日：2014-10-02
申请号：US13853887
申请日：2013-03-29
发明人： Sze-Kwang Tan , Yannick Guedon
IPC分类号： G06F3/044
CPC分类号： G06F3/044 , G06F3/0418
摘要： Apparatus and methods to measure capacitance changes for a touch-sensitive capacitive matrix are described. Charge-removal circuits and measurement techniques may be employed to cancel deleterious effects of parasitic capacitances in the touch-sensitive capacitive matrix. Capacitively switching a supply during timed charge removal may be used to cancel unwanted effects due to clock jitter. The apparatus and methods can improve signal-to-noise characteristics, sensitivity, and/or dynamic range for capacitive measurements relating to touch-sensitive capacitive devices.
摘要翻译： 描述了用于测量触敏电容矩阵的电容变化的装置和方法。 可以采用电荷去除电路和测量技术来消除触敏电容矩阵中寄生电容的有害影响。 在定时充电移除期间电容切换电源可用于消除由于时钟抖动引起的不必要的影响。 该装置和方法可以提高与触敏电容器件相关的电容测量的信噪比特性，灵敏度和/或动态范围。
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公开(公告)号：US09665215B2
公开(公告)日：2017-05-30
申请号：US13853887
申请日：2013-03-29
发明人： Sze-Kwang Tan , Yannick Guedon
CPC分类号： G06F3/044 , G06F3/0418
摘要： Apparatus and methods to measure capacitance changes for a touch-sensitive capacitive matrix are described. Charge-removal circuits and measurement techniques may be employed to cancel deleterious effects of parasitic capacitances in the touch-sensitive capacitive matrix. Capacitively switching a supply during timed charge removal may be used to cancel unwanted effects due to clock jitter. The apparatus and methods can improve signal-to-noise characteristics, sensitivity, and/or dynamic range for capacitive measurements relating to touch-sensitive capacitive devices.
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公开(公告)号：US20160077634A1
公开(公告)日：2016-03-17
申请号：US14945620
申请日：2015-11-19
发明人： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
CPC分类号： G06F3/044 , G06F3/0414 , G06F3/0416 , G06F2203/04103 , G06F2203/04108
摘要： A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
摘要翻译： 用于电容性感测矩阵的读出装置包括被配置为存储电容数据的计算机可读存储介质。 电容数据表示电容性感测矩阵的电容值。 读出装置还包括被配置为从电容性感测矩阵接收信号的读出电路，读出电路基于电容数据配置。 还描述了补偿电容变化的读出方法和方法。
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公开(公告)号：US10209844B2
公开(公告)日：2019-02-19
申请号：US15995340
申请日：2018-06-01
发明人： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
摘要： A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
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公开(公告)号：US20180275802A1
公开(公告)日：2018-09-27
申请号：US15995340
申请日：2018-06-01
发明人： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
CPC分类号： G06F3/044 , G06F3/0414 , G06F3/0416 , G06F2203/04103 , G06F2203/04108 , H05K999/99
摘要： A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
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公开(公告)号：US10013130B2
公开(公告)日：2018-07-03
申请号：US15840438
申请日：2017-12-13
发明人： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
CPC分类号： G06F3/044 , G06F3/0414 , G06F3/0416 , G06F2203/04103 , G06F2203/04108 , H05K999/99
摘要： A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
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公开(公告)号：US09874986B2
公开(公告)日：2018-01-23
申请号：US14945620
申请日：2015-11-19
发明人： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
CPC分类号： G06F3/044 , G06F3/0414 , G06F3/0416 , G06F2203/04103 , G06F2203/04108
摘要： A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
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