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    METHODS FOR STATISTICAL SLEW PROPAGATION DURING BLOCK-BASED STATISTICAL STATIC TIMING ANALYSIS
    6.
    发明申请
    METHODS FOR STATISTICAL SLEW PROPAGATION DURING BLOCK-BASED STATISTICAL STATIC TIMING ANALYSIS 有权
    基于块状统计静态时序分析的统计单播传播方法

    公开(公告)号：US20090288051A1

    公开(公告)日：2009-11-19

    申请号：US12121023

    申请日：2008-05-15

    申请人： Jeffrey G. Hemmett ,  Chandramouli Visweswariah ,  Vladimir Zolotov

    发明人： Jeffrey G. Hemmett ,  Chandramouli Visweswariah ,  Vladimir Zolotov

    IPC分类号： G06F17/50

    CPC分类号： G06F17/5031 ,  G06F2217/84

    摘要： Methods for statistical slew propagation in static statistical timing analysis. The method includes projecting a canonical approximation of an input slew over a timing path to a first corner and using the projected input slew to calculate a delay and an output slew at the first corner. The method further includes perturbing the canonical approximation of the input slew to a different corner, calculating a delay and an output slew at the different corner using the perturbed input slew canonical, and determining a sensitivity of the delay and the output slew to a plurality of parameters, simultaneous with implicit sensitivity calculations to the input slew, with finite difference calculations between the first corner and perturbed data.

    摘要翻译： 静态统计时序分析中统计转换传播的方法。 该方法包括将定时路径上的输入转换的规范近似投影到第一角，并且使用投影输入转换来计算在第一角处的延迟和输出。 该方法进一步包括将输入转换的规范近似扰乱到不同的角，使用干扰的输入转换来计算延迟和在不同角上的输出转换，并且将延迟和输出转换的灵敏度确定为多个 参数，同时与隐式灵敏度计算到输入转换，在第一个角和扰动数据之间进行有限差分计算。

    METHODS FOR CONSERVING MEMORY IN STATISTICAL STATIC TIMING ANALYSIS
    7.
    发明申请
    METHODS FOR CONSERVING MEMORY IN STATISTICAL STATIC TIMING ANALYSIS 有权
    在统计静态时序分析中保存记忆的方法

    公开(公告)号：US20090241078A1

    公开(公告)日：2009-09-24

    申请号：US12053887

    申请日：2008-03-24

    申请人： Jeffrey G. Hemmett ,  Natesan Venkateswaran ,  Chandramouli Visweswariah ,  Vladimir Zolotov

    发明人： Jeffrey G. Hemmett ,  Natesan Venkateswaran ,  Chandramouli Visweswariah ,  Vladimir Zolotov

    IPC分类号： G06F17/50

    CPC分类号： G06F17/5031

    摘要： A method is provided for memory conservation in statistical static timing analysis. A timing graph is created with a timing run in a statistical static timing analysis program. A plurality of nodes in the timing graph that are candidates for a partial store and constraint points are identified. Timing data is persistently stored at constraint points. The persistent timing data is retrieved from the constraint points and used to calculate intermediate timing data at the plurality of nodes during timing analysis.

    摘要翻译： 在统计静态时序分析中提供了一种用于存储器保存的方法。 在统计静态时序分析程序中使用时序运行创建时序图。 识别作为部分存储和约束点的候选的定时图中的多个节点。 定时数据被持久存储在约束点。 从约束点检索持续定时数据，并用于在定时分析期间计算多个节点处的中间定时数据。

    Methods for statistical slew propagation during block-based statistical static timing analysis
    10.
    发明授权
    Methods for statistical slew propagation during block-based statistical static timing analysis 有权
    基于块统计静态时序分析的统计转换传播方法

    公开(公告)号：US08086976B2

    公开(公告)日：2011-12-27

    申请号：US12121023

    申请日：2008-05-15

    申请人： Jeffrey G. Hemmett ,  Chandramouli Visweswariah ,  Vladimir Zolotov

    发明人： Jeffrey G. Hemmett ,  Chandramouli Visweswariah ,  Vladimir Zolotov

    IPC分类号： G06F9/455 ,  G06F17/50

    CPC分类号： G06F17/5031 ,  G06F2217/84

    摘要： Methods for statistical slew propagation in static statistical timing analysis. The method includes projecting a canonical approximation of an input slew over a timing path to a first corner and using the projected input slew to calculate a delay and an output slew at the first corner. The method further includes perturbing the canonical approximation of the input slew to a different corner, calculating a delay and an output slew at the different corner using the perturbed input slew canonical, and determining a sensitivity of the delay and the output slew to a plurality of parameters, simultaneous with implicit sensitivity calculations to the input slew, with finite difference calculations between the first corner and perturbed data.

    摘要翻译： 静态统计时序分析中统计转换传播的方法。 该方法包括将定时路径上的输入转换的规范近似投影到第一角，并且使用投影输入转换来计算在第一角处的延迟和输出。 该方法进一步包括将输入转换的规范近似扰乱到不同的角，使用干扰的输入转换来计算延迟和在不同角上的输出转换，并且将延迟和输出转换的灵敏度确定为多个 参数，同时与隐式灵敏度计算到输入转换，在第一个角和扰动数据之间进行有限差分计算。