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    • 2. 发明授权
    • Low power method of monitoring and of responsively initiating higher powered intelligent response to detected change of condition
    • 低功率监控方法和响应性地启动更高功率的智能响应以检测到状况变化
    • US07543163B2
    • 2009-06-02
    • US11326104
    • 2006-01-04
    • Kent KernahanJohn Carl ThomasCraig Norman Lambert
    • Kent KernahanJohn Carl ThomasCraig Norman Lambert
    • G06F1/00G06F1/26G06F1/32
    • G06F1/3203G06F1/3237G06F1/3287Y02D10/126Y02D10/128Y02D10/171
    • A synchronous control system includes a logic controller (e.g., microprocessor) which can be put into low power standby or sleep mode by shutting off its clock. A quick-start oscillator (QSO) remains shut off to conserve power when not needed, but awakens rapidly and supplies clock signals to the logic controller for quickly awakening the controller so the latter can to respond to exigent circumstances. One such circumstance can be the drop of a vital supply voltage below a predefined threshold. A low power comparator (LPTC) detects the drop and starts up the QSO which in turn awakens the controller. The controller determines what the reason for the awakening is, quickly responds to the exigent circumstance and then turns the QSO off to thereby conserve power and put itself (QSO) back to sleep. Disclosures are provided for the QSO and a first calibration subsystem used to maintain QSO output frequency within a desired range. Disclosures are provided for the LPTC and a second calibration subsystem used to set its trigger threshold. Disclosure of a novel DAC within the LPTC is also provided.
    • 同步控制系统包括逻辑控制器(例如,微处理器),其可通过关闭其时钟而被置于低功率待机或休眠模式。 快速启动振荡器(QSO)保持关闭,以在不需要时节省功耗,但可以快速唤醒并将时钟信号提供给逻辑控制器,以便快速唤醒控制器,以便后者可以响应紧急情况。 一个这样的情况可能是重要的电源电压下降到低于预定阈值。 低功耗比较器(LPTC)检测掉,并启动QSO,这反过来唤醒了控制器。 控制器确定唤醒的原因是什么,快速响应紧急情况,然后关闭QSO,从而节省电力并使其自身(QSO)恢复睡眠。 提供了用于QSO和用于将QSO输出频率保持在期望范围内的第一校准子系统的公开。 为LPTC提供了披露,并且提供了用于设置其触发阈值的第二校准子系统。 还提供了LPTC内的新型DAC的公开。
    • 4. 发明授权
    • Switching power converter method
    • 开关电源转换器方法
    • US07002328B2
    • 2006-02-21
    • US10925643
    • 2004-08-25
    • Kent KernahanJohn Carl Thomas
    • Kent KernahanJohn Carl Thomas
    • G05F1/40
    • H02M3/157G05F3/262H02J7/0065H02M1/0845H02M3/156H02M3/1588H02M2001/0012H02M2001/007H02M2001/008H03M5/08H05B41/2828Y02B20/186Y02B70/1466Y10T307/438Y10T307/469
    • Disclosed is a method of producing a switching power converter which is implemented by providing a ring oscillator made up of a plurality of series-connected inverters. A feedback loop from the output of the last inverter in the series to an input lead of the first inverter in the series is provided. A selection circuit is provided which has a plurality of inputs and one or more outputs. An output of each of the inverters is connected to an associated input of the selection circuit. An exclusive OR gate is provided which has first and second inputs. The selection circuit is configured to selectively provide to the first input of the exclusive OR gate an output signal from an inverter in the string of series connected inverters, and further the selection circuit is configured to provide to the second input of the exclusive OR gate an output signal from an output lead of another inverter in the string of inverters.
    • 公开了一种通过提供由多个串联逆变器构成的环形振荡器来实现的开关电源转换器的制造方法。 提供从串联的最后一个反相器的输出到串联的第一反相器的输入引线的反馈回路。 提供了具有多个输入和一个或多个输出的选择电路。 每个反相器的输出连接到选择电路的相关输入端。 提供具有第一和第二输入的异或门。 选择电路被配置为选择性地向异或门的第一输入提供串联连接的反相器串中的反相器的输出信号,并且还选择电路被配置为向异或门的第二输入提供 来自反相器串中的另一个逆变器的输出引线的输出信号。
    • 5. 发明授权
    • Touch screen display circuit and voltage measurement circuit
    • 触摸屏显示电路和电压测量电路
    • US06961015B2
    • 2005-11-01
    • US10295559
    • 2002-11-14
    • Kent KernahanJohn Carl Thomas
    • Kent KernahanJohn Carl Thomas
    • G05F3/26H02J7/00H02M1/084H02M3/156H02M3/157H02M3/158H03M5/08H03M1/34
    • H02M3/157G05F3/262H02J7/0065H02M1/0845H02M3/156H02M3/1588H02M2001/0012H02M2001/007H02M2001/008H03M5/08H05B41/2828Y02B20/186Y02B70/1466Y10T307/438Y10T307/469
    • A touch screen display circuit is disclosed which includes means for measuring a voltage at two separate input terminals which represent a location on a touch screen where pressure was applied. The display circuit includes means for defining a time period during which the voltage is measured and means for converting the measured voltage to a digital value. The means for measuring a voltage includes an amplifier and a capacitor which are configured as an integrator. The means for converting comprises a counter that measures an amount of time required for the capacitor to dissipate its charge. A touch screen display system having a touch screen which includes first and second sheets of conductive materials positioned in a spaced apart relationship is disclosed. The touch screen display system utilizes a means coupled to the first and second sheets for measuring a voltage at two separate input terminals, a means for defining a time period during which the voltage is measured and a means for converting the voltage to a digital value.
    • 公开了一种触摸屏显示电路,其包括用于测量两个单独输入端子处的电压的装置,其表示施加压力的触摸屏上的位置。 显示电路包括用于定义测量电压的时间段的装置和用于将所测量的电压转换为数字值的装置。 用于测量电压的装置包括被配置为积分器的放大器和电容器。 用于转换的装置包括测量电容器消耗其电荷所需的时间量的计数器。 公开了具有触摸屏的触摸屏显示系统,该触摸屏包括以间隔开的关系定位的第一和第二导电材料片。 触摸屏显示系统利用耦合到第一和第二片材的装置来测量两个分离的输入端子处的电压,用于限定测量电压的时间段的装置和用于将电压转换为数字值的装置。