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    • 6. 发明申请
    • Fractional Charge Pump For Step-Down DC-DC Converter
    • 用于降压型DC-DC转换器的分数电荷泵
    • US20070194363A1
    • 2007-08-23
    • US11678048
    • 2007-02-22
    • Sorin GeorgescuAnthony RussellChris Bartholomeusz
    • Sorin GeorgescuAnthony RussellChris Bartholomeusz
    • H01L29/94
    • H02M3/07H02M2003/072
    • A charge pump provides a multiplication factor of ⅔ by using a three-phase mode of operation. In a first mode, first and second capacitors are charged from an input voltage while a third capacitor drives the output voltage based on stored charge in the third capacitor. In a second mode, the output terminal is connected to the common node of the first and second capacitors. In a third mode, the voltage potential across the second capacitor is subtracted from the sum of the input voltage and the voltage potential across the first capacitor to generate the output voltage. Operated in this manner, the first, second, and third capacitors will provide the desired ⅔× voltage multiplication. This relatively low multiplication factor can be beneficial in applications requiring 2.5V and 1.8V supplies for integrated circuits, particularly where the input voltage is provided by a lithium battery.
    • 电荷泵通过使用三相工作模式提供2/3的倍增系数。 在第一模式中,第一和第二电容器从输入电压充电,而第三电容器基于第三电容器中存储的电荷来驱动输出电压。 在第二模式中,输出端子连接到第一和第二电容器的公共节点。 在第三模式中,从第一电容器两端的输入电压和电压电平之和减去第二电容器两端的电压电位,以产生输出电压。 以这种方式操作,第一,第二和第三电容器将提供期望的2 / 3x电压倍增。 这种相对较低的乘法因子对于集成电路需要2.5V和1.8V电源的应用可能是有益的,特别是在输入电压由锂电池提供的情况下。
    • 7. 发明授权
    • Method and apparatus for non-linear termination of a transmission line
    • 用于非线性终止传输线路的方法和装置
    • US06512393B1
    • 2003-01-28
    • US09714778
    • 2000-11-15
    • Adam J. WhitworthAnthony Russell
    • Adam J. WhitworthAnthony Russell
    • H03K1716
    • H04L25/0298
    • An active termination circuit for clamping a signal on a transmission line in an electronic device is described. The active termination circuit is configured to clamp the signal on the transmission line to one of a first reference voltage level and a second reference voltage level. The active termination circuit includes a bottom clamping transistor having a bottom clamping transistor first node coupled to a transmission line at a transmission line node, a bottom clamping transistor second node coupled to a first potential, and a bottom clamping transistor control node coupled to a first bias voltage supply. The circuit also includes a top clamping transistor having a top clamping transistor first node coupled to the transmission line at the transmission line node, a top clamping transistor second node coupled to a second potential, and a top clamping transistor control node coupled to a second bias voltage supply. The circuit further includes a variable current source arranged to provide bias current as needed to only one or the other of the first bias voltage supply and the second bias voltage supply based upon the state of an input signal on the transmission line.
    • 描述了用于钳位电子设备中的传输线上的信号的有源终端电路。 有源终端电路被配置为将传输线上的信号钳位到第一参考电压电平和第二参考电压电平之一。 有源终端电路包括底部钳位晶体管,其具有耦合到传输线节点处的传输线的底部钳位晶体管第一节点,耦合到第一电位的底部钳位晶体管第二节点和耦合到第一电位的底部钳位晶体管控制节点 偏置电压供应。 电路还包括顶部钳位晶体管,其具有耦合到传输线节点处的传输线的顶部钳位晶体管第一节点,耦合到第二电位的顶部钳位晶体管第二节点和耦合到第二偏置的顶部钳位晶体管控制节点 电压供应 电路还包括可变电流源,其被布置为基于传输线上的输入信号的状态,将需要的偏置电流提供给第一偏置电压源和第二偏置电压源中的一个或另一个。
    • 9. 发明授权
    • Diagnostic and maintenance systems and methods for LED power management integrated circuits
    • LED电源管理集成电路的诊断和维护系统和方法
    • US07606679B1
    • 2009-10-20
    • US11535047
    • 2006-09-25
    • Gelu VoicuLeonard GageaAnthony Russell
    • Gelu VoicuLeonard GageaAnthony Russell
    • G06F11/30
    • H05B33/089H05B33/0893
    • According to some embodiments, a light emitting diode (LED) power management and diagnostics history recording integrated circuit includes a power management circuit controlling a supply of power to the LED, a diagnostics detection circuit recording a diagnostics history for the LED, a non-volatile diagnostics history memory storing the diagnostics history; and an external interface for transferring externally the diagnostics history stored in the non-volatile diagnostics history memory. The diagnostics history includes diagnostics data for at least two sequential occurrences of a reoccurring fault condition. The diagnostics data may include temperature, under-voltage, over-voltage, open-circuit load, and short-circuit load indicators, among others. A diagnostics analysis system downloads the diagnostics data after a given operation period and performs maintenance decisions according to the diagnostics data. Such systems are particularly useful for diagnosing intermittent faults and/or faults in remotely-located systems, and making maintenance decisions accordingly.
    • 根据一些实施例,发光二极管(LED)功率管理和诊断历史记录集成电路包括控制对LED供电的电源管理电路,记录LED的诊断历史的诊断检测电路,非易失性 存储诊断历史的诊断历史记忆; 以及用于外部传送存储在非易失性诊断历史存储器中的诊断历史的外部接口。 诊断历史包括至少两次连续发生的重现故障状况的诊断数据。 诊断数据可以包括温度,欠压,过压,开路负载和短路负载指示器等。 诊断分析系统在给定的操作期间下载诊断数据,并根据诊断数据执行维护决定。 这样的系统对于诊断位于远程位置的系统中的间歇性故障和/或故障特别有用,并且相应地做出维护决定。