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    Method and system for calculating timing variations considering simultaneous switching noise
    1.
    发明授权
    Method and system for calculating timing variations considering simultaneous switching noise 有权
    考虑同时开关噪声计算定时变化的方法和系统

    公开(公告)号：US08825420B1

    公开(公告)日：2014-09-02

    申请号：US12690047

    申请日：2010-01-19

    申请人： Geping Liu ,  Kundan Chand ,  Zhe Li ,  Wui Hung Moo ,  Joseph Boon Hock Kho

    发明人： Geping Liu ,  Kundan Chand ,  Zhe Li ,  Wui Hung Moo ,  Joseph Boon Hock Kho

    IPC分类号： G01R13/00

    CPC分类号： G06F17/5031 ,  G01R13/00 ,  G06F17/5036 ,  G06F2217/08 ,  G06F2217/82 ,  G06F2217/84 ,  H03K19/00346

    摘要： A computer implemented method for determining a timing variation for an edge of a waveform under simultaneous switching noise (SSN) conditions is provided. The method includes characterizing an impact of mutual inductive relationships on a pin while the pin is at a quiet state and characterizing a signal edge applied to the pin. The signal edge can be characterized by the slew rate in one embodiment. A voltage change related to a curve characterizing the impact of mutual inductive relationships is identified and the voltage change is applied to a curve characterizing an impact of SSN on the signal edge. The method includes calculating a timing variation correlated to the voltage change applied to the curve characterizing the impact of SSN on the signal edge and presenting the calculated timing variation.

    摘要翻译： 提供了一种用于在同时开关噪声（SSN）条件下确定波形边缘的定时变化的计算机实现方法。 该方法包括在引脚处于安静状态并表征施加到引脚的信号边缘时，表征引脚上的互感关系的影响。 信号沿可以通过一个实施例中的压摆率来表征。 识别与表征互感关系影响的曲线相关的电压变化，并且将电压变化应用于表征SSN对信号边缘的影响的曲线。 该方法包括计算与应用于表征SSN对信号边缘的影响的曲线的电压变化相关的定时变化，并呈现所计算的定时变化。

    Apparatus and method to provide reduced fan noise at startup
    2.
    发明申请
    Apparatus and method to provide reduced fan noise at startup 审中-公开
    启动时提供降低风扇噪音的装置和方法

    公开(公告)号：US20070292257A1

    公开(公告)日：2007-12-20

    申请号：US11453511

    申请日：2006-06-15

    申请人： Ghee Beng Ooi ,  Joseph Boon Hock Kho ,  Lee Ming Ong

    发明人： Ghee Beng Ooi ,  Joseph Boon Hock Kho ,  Lee Ming Ong

    IPC分类号： F04D27/02 ,  F01D17/06

    CPC分类号： F04D27/00 ,  F04D29/663

    摘要： In some embodiments, a system includes an electronic system board, a fan positioned to provide cooling for the electronic system board, wherein the fan is configured to be controlled by a pulse width modulated signal, and a fan startup circuit configured to operate the fan in accordance with a first operating condition during startup and in accordance with a second operating condition after startup. Other embodiments are disclosed and claimed.

    摘要翻译： 在一些实施例中，一个系统包括一个电子系统板，一个定位为为电子系统板提供冷却的风扇，其中该风扇被配置成由一个脉宽调制信号控制，一个风扇启动电路， 根据启动时的第一操作条件和启动后的第二操作条件。 公开和要求保护其他实施例。