Pulse frequency modulation methods and circuits
    31.
    发明授权
    Pulse frequency modulation methods and circuits 有权
    脉冲频率调制方法和电路

    公开(公告)号:US08058859B2

    公开(公告)日:2011-11-15

    申请号:US11216435

    申请日:2005-08-30

    申请人: Peng Xu

    发明人: Peng Xu

    IPC分类号: G05F1/575

    摘要: A technique for voltage regulation involves switching between light load mode and PWM mode based on load conditions. Advantageously, this improves efficiency at light load. In an embodiment, error amplifier output is used to determine whether load is light. When light load is detected, extend PWM off time until the output voltage reaches a load threshold.

    摘要翻译: 一种电压调节技术包括基于负载条件在轻负载模式和PWM模式之间切换。 有利地,这提高了轻负载下的效率。 在一个实施例中,使用误差放大器输出来确定负载是否轻。 当检测到轻负载时,延长PWM关闭时间,直到输出电压达到负载阈值。

    ARCING EVENT DETECTION
    32.
    发明申请
    ARCING EVENT DETECTION 有权
    ARCING事件检测

    公开(公告)号:US20110137590A1

    公开(公告)日:2011-06-09

    申请号:US12980011

    申请日:2010-12-28

    IPC分类号: G06F19/00 G01R31/02

    CPC分类号: G01R31/1227 G01R31/025

    摘要: A system for detecting electrical arcing on an electrical power system includes: a) a data acquisition unit that is electrically connected to an electrical power system, wherein the data acquisition unit is configured to monitor signals indicative of a first periodic property of the electrical power system, wherein the signal includes a normal load component; and b) a computing device operably connected to the data acquisition unit. The computing device is programmed to: i) obtain first data from the data acquisition unit indicative of the temporal behavior of the first signal; ii) remove the normal load component from the first data; and iii) determine that an arcing event is present on the electrical power system when the at least one burst within the first data presents a generally sinusoidal shape which includes generally flat regions which are present where the generally sinusoidal shape crosses over a zero-magnitude line.

    摘要翻译: 一种用于检测电力系统上的电弧的系统,包括:a)数据采集单元,其电连接到电力系统,其中所述数据采集单元被配置为监测指示所述电力系统的第一周期性质的信号 ,其中所述信号包括正常负载分量; 以及b)可操作地连接到数据获取单元的计算设备。 计算设备被编程为:i)从数据获取单元获取指示第一信号的时间行为的第一数据; ii)从第一数据中删除正常负载分量; 以及iii)当所述第一数据中的所述至少一个突发呈现大致正弦形状时,确定在所述电力系统上存在电弧放电事件,所述大致正弦形状包括大致平坦的区域,其中所述大致正弦形状在零幅度线上交叉 。

    OPINION SEARCH ENGINE
    33.
    发明申请
    OPINION SEARCH ENGINE 有权
    意见搜索引擎

    公开(公告)号:US20110078157A1

    公开(公告)日:2011-03-31

    申请号:US12568702

    申请日:2009-09-29

    IPC分类号: G06F17/30 G06F7/00

    摘要: A computer-readable storage medium having stored thereon computer-executable instructions which, when executed by a computer, cause the computer to implement an opinion search engine. The instructions to implement an opinion search engine cause the computer to collect opinion data about one or more objects from the Internet, extract metadata about the opinion data from the opinion data, remove duplicate metadata from the metadata to generate a resulting metadata, categorize the resulting metadata for similar objects according to one or more taxonomies from one or more websites on the Internet and rank the similar objects based on the categorized metadata.

    摘要翻译: 一种其上存储有计算机可执行指令的计算机可读存储介质,其在由计算机执行时使计算机实现意见搜索引擎。 实施意见搜索引擎的说明导致计算机从互联网收集关于一个或多个对象的意见数据,从意见数据中提取关于意见数据的元数据,从元数据中移除重复的元数据以生成结果元数据, 根据来自互联网上的一个或多个网站的一个或多个分类法的类似对象的元数据,并且基于分类的元数据对相似的对象进行排序。

    PHASE DRIFT COMPENSATION FOR SAMPLED SIGNALS
    36.
    发明申请
    PHASE DRIFT COMPENSATION FOR SAMPLED SIGNALS 有权
    采样信号的相位补偿补偿

    公开(公告)号:US20090116600A1

    公开(公告)日:2009-05-07

    申请号:US11934606

    申请日:2007-11-02

    IPC分类号: H04L7/00

    摘要: Methods for processing a signal of interest in an electrical power system are provided, as well as systems and computer program products for carrying out the methods. The methods include obtaining a representative window of data points from the signal of interest; obtaining a window of interest containing data points from the signal of interest; and comparing a phase drift compensated window to the representative window, wherein the compensated window is calculated in accordance with the window of interest and a phase drift that is present in the window of interest relative to the representative window.

    摘要翻译: 提供了用于处理电力系统中感兴趣的信号的方法,以及用于执行方法的系统和计算机程序产品。 所述方法包括从感兴趣的信号获得数据点的代表性窗口; 从感兴趣的信号获得包含数据点的感兴趣的窗口; 以及将相位漂移补偿窗口与代表窗口进行比较,其中根据感兴趣的窗口计算补偿的窗口,并且相对于代表窗口存在于相关窗口中的相位漂移。

    Current control method and circuit for light emitting diodes
    37.
    发明授权
    Current control method and circuit for light emitting diodes 有权
    发光二极管的电流控制方法和电路

    公开(公告)号:US07511436B2

    公开(公告)日:2009-03-31

    申请号:US10555680

    申请日:2004-04-30

    申请人: Peng Xu

    发明人: Peng Xu

    IPC分类号: G05F1/00

    CPC分类号: H05B33/0815 Y02B20/347

    摘要: A flow of a LED current (ILED2) through one or more LEDs is controlled by a LED current control circuit (50-54) implementing a method (30) that is independent of an input line and a load of the LED(s).

    摘要翻译: 通过一个或多个LED的LED电流(ILED2)的流动由实现独立于LED的输入线和负载的方法(30)的LED电流控制电路(50-54)控制。

    Method for high efficiency audio amplifier
    38.
    发明授权
    Method for high efficiency audio amplifier 有权
    高效率音频放大器的方法

    公开(公告)号:US07417503B2

    公开(公告)日:2008-08-26

    申请号:US11252218

    申请日:2005-10-17

    IPC分类号: H03F3/217

    摘要: The present invention introduces methods and circuits to amplify audio signals for driving speakers. An additional feedback circuit is added in an audio amplifier to couple the amplifier stage and output stage of the audio amplifier. The feedback circuit turned off as long as output voltages of the audio amplifier are not near saturation. The feedback circuit is turned on to reduce audible noises if output voltages of the audio amplifier are near saturation.

    摘要翻译: 本发明引入了放大用于驱动扬声器的音频信号的方法和电路。 在音频放大器中增加一个附加的反馈电路,以耦合音频放大器的放大器级和输出级。 只要音频放大器的输出电压不接近饱和,反馈电路就关闭。 如果音频放大器的输出电压接近饱和,则反馈电路接通以减少可听见的噪声。

    Active damping control for a switch mode power supply
    39.
    发明授权
    Active damping control for a switch mode power supply 有权
    开关模式电源的主动阻尼控制

    公开(公告)号:US07230838B2

    公开(公告)日:2007-06-12

    申请号:US11321248

    申请日:2005-12-28

    申请人: Peng Xu

    发明人: Peng Xu

    IPC分类号: H02M5/42 G05F1/40

    摘要: Methods and apparatus are disclosed for suppressing circuit noise due to parasitic elements in switch mode power supplies. The presented embodiments use actively controlled damping devices such as controllable resistors, current sources, and tri-state power devices to achieve required damping and to minimize power loss.

    摘要翻译: 公开了用于抑制由开关模式电源中的寄生元件引起的电路噪声的方法和装置。 所提出的实施例使用主动控制的阻尼装置,例如可控电阻器,电流源和三态功率器件来实现所需的阻尼并且最小化功率损耗。

    Active damping control for a switch mode power supply
    40.
    发明申请
    Active damping control for a switch mode power supply 有权
    开关模式电源的主动阻尼控制

    公开(公告)号:US20060158127A1

    公开(公告)日:2006-07-20

    申请号:US11321248

    申请日:2005-12-28

    申请人: Peng Xu

    发明人: Peng Xu

    IPC分类号: H05B37/00

    摘要: Methods and apparatus are disclosed for suppressing circuit noise due to parasitic elements in switch mode power supplies. The presented embodiments use actively controlled damping devices such as controllable resistors, current sources, and tri-state power devices to achieve required damping and to minimize power loss.

    摘要翻译: 公开了用于抑制由开关模式电源中的寄生元件引起的电路噪声的方法和装置。 所提出的实施例使用主动控制的阻尼装置,例如可控电阻器,电流源和三态功率器件来实现所需的阻尼并且最小化功率损耗。