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61 条记录 (耗时 0.054 秒)

    Data-directed scrambler for multi-bit noise shaping D/A converters
    41.
    发明授权
    Data-directed scrambler for multi-bit noise shaping D/A converters 失效
    用于多位噪声整形D / A转换器的数据导向扰频器

    公开(公告)号：US5404142A

    公开(公告)日：1995-04-04

    申请号：US102574

    申请日：1993-08-05

    申请人： Robert W. Adams ,  Tom W. Kwan

    发明人： Robert W. Adams ,  Tom W. Kwan

    IPC分类号： H03M1/08 ,  H03H17/02 ,  H03M1/06 ,  H03M1/66 ,  H03M3/04

    CPC分类号： H03M1/0668 ,  H03M1/66 ,  H03M3/502

    摘要： A scrambler for use with thermometer-code digital signals and having a number of interconnected identical switching cells in the form of swapper cells with two inputs and two outputs. A control signal determines whether the inputs are connected directly or reversely to the outputs. The control signal is developed by logic circuitry which receives as inputs the two swapper cell input bits and a state bit representing the integrated difference of past swapper output signals.

    摘要翻译： 一种用于温度计代码数字信号并且具有多个互连的相同开关单元的加扰器，其具有两个输入和两个输出的交换器单元的形式。 控制信号确定输入是直接还是反向连接到输出。 控制信号由逻辑电路开发，逻辑电路接收两个交换单元输入位的输入和表示过去交换器输出信号的积分差的状态位。

    Capacitive touch sensing system with interference rejection
    42.
    发明授权
    Capacitive touch sensing system with interference rejection 有权
    具有干扰抑制功能的电容式触摸感应系统

    公开(公告)号：US08982093B2

    公开(公告)日：2015-03-17

    申请号：US13754632

    申请日：2013-01-30

    申请人： Guo Wen Wei ,  Tom W. Kwan

    发明人： Guo Wen Wei ,  Tom W. Kwan

    IPC分类号： G06F3/045 ,  G06F3/041 ,  G06F3/044

    CPC分类号： G06F3/044 ,  G06F3/0418

    摘要： An interference tolerant capacitive touch sensor readout circuit having improved power and area efficiency is disclosed. Interference rejection for the capacitive touch sensing system is realized by transferring charge between a capacitive touch sensor and the readout circuit at frequencies outside bands where a level of interference is unacceptable. Improved power and area efficient come from the simplicity of the readout circuit which comprises a switched-capacitor integrator, a comparator, a digital accumulator and number of switches for driving a touch sensor and a capacitive feedback loop. The readout circuit is capable of interfacing with both self and mutual capacitance sensor to achieve compatibility with a larger collection of sensors and provides additional sensing and diagnostic functionalities.

    摘要翻译： 公开了具有改进的功率和面积效率的抗干扰电容式触摸传感器读出电路。 通过在电容式触摸传感器和读出电路之间的频率外的频率处传输电荷来实现电容式触摸感测系统的干扰抑制，其中干扰水平是不可接受的。 改进的功率和面积效率来自包括开关电容积分器，比较器，数字累加器和用于驱动触摸传感器和电容反馈回路的开关数量的读出电路的简单性。 读出电路能够与自相互电容传感器和互电容传感器接口，以实现与较大传感器的兼容性，并提供额外的感测和诊断功能。

    Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current
    47.
    发明授权
    Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current 失效
    开关电容，共模反馈电路，用于不带尾电流的差分放大器

    公开(公告)号：US06930545B2

    公开(公告)日：2005-08-16

    申请号：US10918550

    申请日：2004-08-16

    申请人： Tom W. Kwan ,  Ralph Duncan ,  Frank W. Singor

    发明人： Tom W. Kwan ,  Ralph Duncan ,  Frank W. Singor

    IPC分类号： H03F3/00 ,  H03F3/45 ,  H03F1/02

    CPC分类号： H03F3/45645 ,  H03F3/005 ,  H03F3/45179 ,  H03F3/45188 ,  H03F3/45654 ,  H03F2203/45394 ,  H03F2203/45421 ,  H03F2203/45651

    摘要： Provided is a switched capacitor feedback circuit including two or more input ports configured to receive a corresponding a number of input signals and at least one output port. The output port is configured to output an adjusting signal. The input signals includes a number of primary signals and two or more reference signals that are associated with a first timing phase of operation. The adjusting signal is produced based upon a comparison between the primary signals the reference signals. Also provided is a pair of active devices having gates coupled together and structured to receive the adjusting signal. The active devices are configured to provide a gain to the adjusting signal in accordance with a predetermined gain factor, and facilitate an adjustment to the number of primary signals based upon the gain during a second timing phase of operation.

    摘要翻译： 提供了一种开关电容器反馈电路，其包括被配置为接收对应的多个输入信号和至少一个输出端口的两个或多个输入端口。 输出端口配置为输出调整信号。 输入信号包括与第一定时相位相关联的多个主信号和两个或更多个参考信号。 基于主信号之间的参考信号的比较产生调整信号。 还提供了一对具有耦合在一起并被构造成接收调节信号的门的有源器件。 有源器件被配置为根据预定的增益因子向调整信号提供增益，并且有助于在操作的第二定时阶段期间基于增益来调整主信号的数量。

    Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current
    49.
    发明授权
    Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current 失效
    开关电容，共模反馈电路，用于不带尾电流的差分放大器

    公开(公告)号：US06781451B2

    公开(公告)日：2004-08-24

    申请号：US10425719

    申请日：2003-04-30

    申请人： Tom W. Kwan ,  Ralph Duncan ,  Frank W. Singor

    发明人： Tom W. Kwan ,  Ralph Duncan ,  Frank W. Singor

    IPC分类号： H03F102

    CPC分类号： H03F3/45645 ,  H03F3/005 ,  H03F3/45179 ,  H03F3/45188 ,  H03F3/45654 ,  H03F2203/45394 ,  H03F2203/45421 ,  H03F2203/45651

    摘要： Provided is a switched capacitor feedback circuit including two or more input ports configured to receive a corresponding a number of input signals and at least one output port. The output port is configured to output an adjusting signal. The input signals includes a number of primary signals and two or more reference signals that are associated with a first timing phase of operation. The adjusting signal is produced based upon a comparison between the primary signals the reference signals. Also provided is a pair of active devices having gates coupled together and structured to receive the adjusting signal. The active devices are configured to provide a gain to the adjusting signal in accordance with a predetermined gain factor, and facilitate an adjustment to the number of primary signals based upon the gain during a second timing phase of operation.

    摘要翻译： 提供了一种开关电容器反馈电路，其包括被配置为接收对应的多个输入信号和至少一个输出端口的两个或多个输入端口。 输出端口配置为输出调整信号。 输入信号包括与第一定时相位相关联的多个主信号和两个或更多个参考信号。 基于主信号之间的参考信号的比较产生调整信号。 还提供了一对具有耦合在一起并被构造成接收调节信号的门的有源器件。 有源器件被配置为根据预定的增益因子向调整信号提供增益，并且有助于在操作的第二定时阶段期间基于增益来调整主信号的数量。