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    • 4. 发明授权
    • Pulse width modulation systems and methods
    • 脉宽调制系统及方法
    • US06822588B1
    • 2004-11-23
    • US10825577
    • 2004-04-15
    • Jerry A. Marshall, Jr.Jeffrey G. SchoperBrian S. Watson
    • Jerry A. Marshall, Jr.Jeffrey G. SchoperBrian S. Watson
    • H03M700
    • H03M7/165
    • Pulse width modulation systems and methods are described. In one aspect, a pulse width modulation system includes a register and a code word generator. The code word generator has an input for receiving a specified output frequency and a specified duty cycle and is operable to generate code words of different lengths. The code word generator is operable to generate a base code word having a length set to achieve the specified output frequency and having a thermometer code value set in accordance with the specified duty cycle. The code word generator is further operable to load the register with a code word pattern including a sequence of one or more copies of the base code word.
    • 描述了脉宽调制系统和方法。 一方面,脉宽调制系统包括寄存器和码字发生器。 码字生成器具有用于接收指定的输出频率和指定的占空比的输入,并且可操作以产生不同长度的码字。 码字生成器可操作以产生具有设定长度的基本码字,以实现指定的输出频率并具有根据指定的占空比设置的温度计代码值。 代码字产生器还可操作以用包括基本代码字的一个或多个副本的序列的代码字模式加载寄存器。
    • 5. 发明授权
    • Programmatic sensing of capacitive sensors
    • 电容传感器的编程感应
    • US08884920B1
    • 2014-11-11
    • US13477664
    • 2012-05-22
    • Roger N. SwitzerJerry A. Marshall, Jr.
    • Roger N. SwitzerJerry A. Marshall, Jr.
    • G06F3/044
    • G06F3/044G06F2203/04103
    • The present disclosure describes apparatuses and techniques for programmatic sensing of capacitive sensors. In some aspects, a first set of instructions are executed that drive an output to a predetermined state for a duration of time effective to charge a capacitive sense element, a second set of instructions are executed that monitor a voltage level of the capacitive sense element, the second set of instructions executed for a number of iterations until the voltage level of the capacitive sense element crosses a predefined threshold, and user interaction with the capacitive sense element is determined based on the number of iterations that the second set of instructions execute.
    • 本公开描述了用于电容式传感器的编程感测的装置和技术。 在一些方面,执行第一组指令,其将输出驱动到预定状态持续时间以有效地对电容性感测元件充电,执行监视电容性感测元件的电压电平的第二组指令, 执行多次迭代的第二组指令,直到电容检测元件的电压电平与预定阈值相交,并且基于第二组指令执行的迭代次数确定与电容检测元件的用户交互。