公开(公告)号：US20140333581A1

公开(公告)日：2014-11-13

申请号：US14340023

申请日：2014-07-24

申请人： Texas Instruments Incorporated

发明人： Ronald F. Cormier, JR. ,  Robert J. Stoddard

IPC分类号： G06F3/044

摘要： A touch screen controller system for controlling a touch screen having row conductors and column conductors includes analog-digital circuitry coupled to the row conductors and column conductors to produce digital signals representative of self capacitance changes of one of the column conductors during an element proximity scanning mode and also representative of mutual changes of the touch screen during an element location scanning mode. The analog-digital circuitry indicates the influence of an element on the self-capacitance during the element proximity scanning. Proximity-determining circuitry operates on the digital signal changes during the element proximity scanning to determine if the element is proximate to the touch screen, and also to determine if the element is a specific kind of element by comparing the digital signal changes to a predetermined data profile.

摘要翻译： 用于控制具有行导体和列导体的触摸屏的触摸屏控制器系统包括耦合到行导体和列导体的模拟数字电路，以在元件接近扫描模式期间产生表示列导体之一的自电容变化的数字信号 并且还表示在元素位置扫描模式期间触摸屏的相互变化。 模拟数字电路指示元件接近扫描期间元件对自电容的影响。 接近度确定电路在元件接近扫描期间对数字信号变化进行操作以确定元件是否接近触摸屏，并且还通过将数字信号变化与预定数据进行比较来确定元件是否是特定类型的元件 个人资料

公开(公告)号：US20200348777A1

公开(公告)日：2020-11-05

申请号：US16930568

申请日：2020-07-16

申请人： Texas Instruments Incorporated

发明人： Ronald F. Cormier, JR. ,  Robert J. Stoddard

IPC分类号： G06F3/044 ,  G06F3/041 ,  G06F1/3234 ,  G06F1/3287 ,  G06F1/3231 ,  G06F1/3215

摘要： A touch screen controller system for controlling a touch screen having row conductors and column conductors includes analog-digital circuitry coupled to the row conductors and column conductors to produce digital signals representative of self capacitance changes of one of the column conductors during an element proximity scanning mode and also representative of mutual changes of the touch screen during an element location scanning mode. The analog-digital circuitry indicates the influence of an element on the self-capacitance during the element proximity scanning. Proximity-determining circuitry operates on the digital signal changes during the element proximity scanning to determine if the element is proximate to the touch screen, and also to determine if the element is a specific kind of element by comparing the digital signal changes to a predetermined data profile.

公开(公告)号：US20150054528A1

公开(公告)日：2015-02-26

申请号：US14475740

申请日：2014-09-03

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Ronald F. Cormier, JR.

IPC分类号： G01R27/26 ,  G06F3/044

CPC分类号： G01R27/2605 ,  G01D1/00 ,  G01D15/00 ,  G01D21/00 ,  G06F3/044 ,  G06F2203/0336

摘要： A system for measuring a capacitor (CSENj) precharges a CDAC (23) in a SAR converter (17) to a reference voltage (VAZ) and also precharges a first terminal (3-j) of the capacitor to another reference voltage (GND). During a measurement phase, the CDAC is coupled between an output and an input of an amplifier (31) and the capacitor also is coupled to the input of the amplifier, so as to redistribute charge between the capacitor and the CDAC. The amplifier generates an output voltage (VAMP) representing the capacitance being measured. The output voltage is stored in the CDAC. The SAR converter converts the output voltage to a digital value representing the capacitance being measured.

摘要翻译： 用于测量电容器（CSENj）的系统将SAR转换器（17）中的CDAC（23）预充电到参考电压（VAZ），并且还将电容器的第一端子（3-j）预充电到另一参考电压（GND） 。 在测量阶段期间，CDAC耦合在放大器（31）的输出端和输入端之间，并且电容器还耦合到放大器的输入端，以便在电容器和CDAC之间重新分配电荷。 放大器产生表示被测电容的输出电压（VAMP）。 输出电压存储在CDAC中。 SAR转换器将输出电压转换为表示被测电容的数字值。