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公开(公告)号：US20120217981A1
公开(公告)日：2012-08-30
申请号：US13403885
申请日：2012-02-23
IPC分类号： G01R27/26
CPC分类号： G01R27/2605 , G01D5/24 , G06F3/0416 , G06F3/044
摘要： Capacitance sensing circuits, systems and method can include sample and hold (S/H) circuits that can retain analog values for one set of capacitance sensors, and sequentially convert such analog values into digital values while analog values for another set of capacitance sensors values are generated.
摘要翻译： 电容感测电路，系统和方法可以包括可以保持一组电容传感器的模拟值的采样和保持（S / H）电路，并且将这些模拟值顺序地转换为数字值，而另一组电容传感器值的模拟值为 生成。
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2.发明申请NOISE CANCELLATION TECHNIQUE FOR CAPACITIVE TOUCHSCREEN CONTROLLER USING DIFFERENTIAL SENSING 有权使用差分感测的电容式触控控制器的噪声消除技术公开(公告)号：US20110261007A1
公开(公告)日：2011-10-27
申请号：US12986881
申请日：2011-01-07
IPC分类号： G06F3/045
CPC分类号： G06F3/0418 , G06F3/0416 , G06F3/044 , H03K17/96 , H03K2217/96062
摘要： A differential sensing scheme provides a means for detecting one or more touch events on a touch sensitive device in the presence of incident noise. Instead of sensing one touch sensitive channel, such as a row, column, or single touch sensor, multiple touch sensitive channels are sampled at a time. By sampling two nearby channels simultaneously and doing the measurement differentially, noise common to both channels is cancelled. The differential sensing scheme is implemented using simple switch-capacitor AFE circuitry. The originally sensed data on each individual channel is recovered free of common-mode noise. The recovered sensed data is used to determine the presence of one or more touch events and if present the location of each touch event on the touch sensitive device.
摘要翻译： 差分感测方案提供了用于在存在入射噪声的情况下检测触敏装置上的一个或多个触摸事件的装置。 代替检测一个触敏通道（例如行，列或单触摸传感器），一次对多个触摸敏感通道进行采样。 通过同时采样两个附近的通道并进行差分测量，两个通道共同的噪声被取消。 差分感测方案采用简单的开关电容AFE电路实现。 每个独立通道上的原始感测数据被恢复，没有共模噪声。 恢复的感测数据用于确定一个或多个触摸事件的存在，并且如果存在触摸敏感设备上的每个触摸事件的位置。
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公开(公告)号：US09086439B2
公开(公告)日：2015-07-21
申请号：US13403885
申请日：2012-02-23
CPC分类号： G01R27/2605 , G01D5/24 , G06F3/0416 , G06F3/044
摘要： Capacitance sensing circuits, systems and method can include sample and hold (S/H) circuits that can retain analog values for one set of capacitance sensors, and sequentially convert such analog values into digital values while analog values for another set of capacitance sensors values are generated.
摘要翻译： 电容感测电路，系统和方法可以包括可以保持一组电容传感器的模拟值的采样和保持（S / H）电路，并且将这些模拟值顺序地转换为数字值，而另一组电容传感器值的模拟值为 生成。
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4.发明授权Noise cancellation technique for capacitive touchscreen controller using differential sensing 有权使用差分感测的电容式触摸屏控制器的噪声消除技术公开(公告)号：US08493356B2
公开(公告)日：2013-07-23
申请号：US12986881
申请日：2011-01-07
IPC分类号： G06F3/045
CPC分类号： G06F3/0418 , G06F3/0416 , G06F3/044 , H03K17/96 , H03K2217/96062
摘要： A differential sensing scheme provides a means for detecting one or more touch events on a touch sensitive device in the presence of incident noise. Instead of sensing one touch sensitive channel, such as a row, column, or single touch sensor, multiple touch sensitive channels are sampled at a time. By sampling two nearby channels simultaneously and doing the measurement differentially, noise common to both channels is cancelled. The differential sensing scheme is implemented using simple switch-capacitor AFE circuitry. The originally sensed data on each individual channel is recovered free of common-mode noise. The recovered sensed data is used to determine the presence of one or more touch events and if present the location of each touch event on the touch sensitive device.
摘要翻译： 差分感测方案提供了用于在存在入射噪声的情况下检测触敏装置上的一个或多个触摸事件的装置。 代替检测一个触敏通道（例如行，列或单触摸传感器），一次对多个触摸敏感通道进行采样。 通过同时采样两个附近的通道并进行差分测量，两个通道共同的噪声被取消。 差分感测方案采用简单的开关电容AFE电路实现。 每个独立通道上的原始感测数据被恢复而不存在共模噪声。 恢复的感测数据用于确定一个或多个触摸事件的存在，并且如果存在触摸敏感设备上的每个触摸事件的位置。
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