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    • 31. 发明申请
    • Switching power converter employing pulse frequency modulation control
    • 采用脉冲调频控制的开关电源转换器
    • US20060145678A1
    • 2006-07-06
    • US11030688
    • 2005-01-05
    • Milton RibeiroKent Kernahan
    • Milton RibeiroKent Kernahan
    • G05F5/00
    • H02M3/156
    • A method for controlling a switching power converter provides an efficient algorithm for controlling the output voltage across loads that are relatively light with small transients. When the output voltage is at or below a predetermined first magnitude, a determination is made of the charge required for one or more pulses to increase the output voltage to a predetermined second magnitude which is greater than a target output voltage. Corrective action is taken to raise the output voltage to the second magnitude and the system takes no further corrective action until output voltage is determined to be at or below the first magnitude. The method is useful with synchronous or non-synchronous power converters of buck, boost, buck/boost or other topologies. The method further provides a simple means for determining the amount of charge removed from a battery.
    • 用于控制开关功率转换器的方法提供了一种有效的算法,用于控制跨越具有小瞬变的相对较轻的负载的输出电压。 当输出电压处于或低于预定的第一幅度时,确定一个或多个脉冲所需的电荷将输出电压增加到大于目标输出电压的预定的第二幅度。 采取纠正措施将输出电压提高到第二幅度,并且在确定输出电压等于或低于第一幅度之前,系统不再采取任何纠正措施。 该方法对于降压,升压,降压/升压或其他拓扑的同步或非同步电源转换器非常有用。 该方法还提供了用于确定从电池移除的电荷量的简单装置。
    • 32. 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。
    • 33. 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。