公开(公告)号：US20120293444A1

公开(公告)日：2012-11-22

申请号：US13108700

申请日：2011-05-16

申请人： Jerome D. Wong ,  Mercedes Gil ,  Zhi Zhong Huang ,  Xu Zhang ,  Xiao Yan Zheng

发明人： Jerome D. Wong ,  Mercedes Gil ,  Zhi Zhong Huang ,  Xu Zhang ,  Xiao Yan Zheng

IPC分类号： G06F3/045

CPC分类号： G06F3/044 ,  G06F1/3262 ,  G06F3/0416 ,  G06F3/05

摘要： Various embodiments of a low-power-consumption analog-to-digital converter (“ADC”) for a touchscreen or touch panel in a capacitive sensing system are disclosed. The ADC is configured to operate in a first mode or a second mode. The first mode is characterized by a first resolution having a first number of ADC bits and a first level of power consumption associated therewith. The second mode is characterized by a second resolution having a second number of bits and a second level of power consumption associated therewith. The ADC operates under control of the controller and is configured such that the first number of bits is greater than the second number of bits and the first power level is greater than the second power level. The controller causes the ADC to switch from operating in the first mode to operating in the second mode when low radio frequency (RF) noise conditions are detected by sense circuitry, the ADC and/or the controller.

摘要翻译： 公开了用于电容感测系统中的触摸屏或触摸面板的低功耗模数转换器（ADC）的各种实施例。 ADC被配置为在第一模式或第二模式下操作。 第一模式的特征在于具有第一数量的ADC位和与其相关联的第一级功耗的第一分辨率。 第二模式的特征在于具有第二数量位的第二分辨率和与其相关联的第二级功耗。 ADC在控制器的控制下操作，并且被配置为使得第一位数大于第二位数，并且第一功率电平大于第二功率电平。 当感测电路，ADC和/或控制器检测到低射频（RF）噪声条件时，控制器使ADC从第一模式工作切换到第二模式。

公开(公告)号：US08648834B2

公开(公告)日：2014-02-11

申请号：US13108700

申请日：2011-05-16

申请人： Jerome D. Wong ,  Mercedes Gil ,  Zhi Zhong Huang ,  Xu Zhang ,  Xiao Yan Zheng

发明人： Jerome D. Wong ,  Mercedes Gil ,  Zhi Zhong Huang ,  Xu Zhang ,  Xiao Yan Zheng

IPC分类号： G06F3/045

CPC分类号： G06F3/044 ,  G06F1/3262 ,  G06F3/0416 ,  G06F3/05

摘要： Various embodiments of a low-power-consumption analog-to-digital converter (“ADC”) for a touchscreen or touch panel in a capacitive sensing system are disclosed. The ADC is configured to operate in a first mode or a second mode. The first mode is characterized by a first resolution having a first number of ADC bits and a first level of power consumption associated therewith. The second mode is characterized by a second resolution having a second number of bits and a second level of power consumption associated therewith. The ADC operates under control of the controller and is configured such that the first number of bits is greater than the second number of bits and the first power level is greater than the second power level. The controller causes the ADC to switch from operating in the first mode to operating in the second mode when low radio frequency (RF) noise conditions are detected by sense circuitry, the ADC and/or the controller.

摘要翻译： 公开了用于电容感测系统中的触摸屏或触摸面板的低功耗模数转换器（“ADC”）的各种实施例。 ADC被配置为在第一模式或第二模式下操作。 第一模式的特征在于具有第一数量的ADC位和与其相关联的第一级功耗的第一分辨率。 第二模式的特征在于具有第二数量位的第二分辨率和与其相关联的第二级功耗。 ADC在控制器的控制下操作，并且被配置为使得第一位数大于第二位数，并且第一功率电平大于第二功率电平。 当感测电路，ADC和/或控制器检测到低射频（RF）噪声条件时，控制器使ADC从第一模式工作切换到第二模式。