Method for detecting flaws in a functional verification plan
    41.
    发明授权
    Method for detecting flaws in a functional verification plan 失效
    检测功能验证计划中缺陷的方法

    公开(公告)号:US07434184B2

    公开(公告)日:2008-10-07

    申请号:US11450701

    申请日:2006-06-09

    申请人: Zhe Li

    发明人: Zhe Li

    IPC分类号: G06F17/50

    CPC分类号: G06F17/5022

    摘要: This method uses 2 copies of the design under test. These 2 copies use different values (including primary inputs and initial states) to feed the supposedly irrelevant logic while using the same (or consistent as desired) values to feed the feature being verified. Symbolic method is used to efficiently determine whether the feature being verified behaves identically (or consistently as expected) in the 2 copies for all possible cases in the supposedly irrelevant logic.

    摘要翻译: 该方法使用2份被测设计。 这两个副本使用不同的值(包括主要输入和初始状态)来提供所谓的无关逻辑,同时使用相同的(或一致的)值来馈送被验证的功能。 符号方法用于有效地确定被验证的特征是否与所谓的无关逻辑中的所有可能情况的2个拷贝中的行为相同(或一致地预期)。

    Method and system for calculating timing variations considering simultaneous switching noise
    47.
    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

    IPC分类号: G01R13/00

    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。

    Method and apparatus for data processing using queuing
    48.
    发明授权
    Method and apparatus for data processing using queuing 失效
    使用排队的数据处理方法和装置

    公开(公告)号:US08645960B2

    公开(公告)日:2014-02-04

    申请号:US11781820

    申请日:2007-07-23

    IPC分类号: G06F9/46

    摘要: A computing device is provided having a central processing unit, random access memory, and read only memory interconnected by a bus. The central processing unit is configured to execute a plurality of programming instructions representing a plurality of software objects. The software objects comprise a read queue for storing unprocessed packets and a write queue for storing processed packets. The software objects include a reader thread for reading packets from the read queue and a lock free queue for receiving packets received via the reader thread. The software objects also include at least one processor thread for performing an operation on the packets in the lock free queue. The software objects include a writer thread for writing packets that have been processed by the at least one processor thread to the write queue.

    摘要翻译: 提供了具有中央处理单元,随机存取存储器和通过总线互连的只读存储器的计算设备。 中央处理单元被配置为执行表示多个软件对象的多个编程指令。 软件对象包括用于存储未处理分组的读队列和用于存储处理分组的写队列。 软件对象包括用于从读取队列读取分组的读取器线程和用于接收经由读取器线程接收的分组的无锁队列。 软件对象还包括至少一个处理器线程,用于对无锁队列中的分组执行操作。 软件对象包括用于将由至少一个处理器线程处理的分组写入到写入队列的写入器线程。