SYSTEM AND METHOD FOR EFFICIENT MODELING OF NPSKEW EFFECTS ON STATIC TIMING TESTS
    2.
    发明申请
    SYSTEM AND METHOD FOR EFFICIENT MODELING OF NPSKEW EFFECTS ON STATIC TIMING TESTS 有权
    用于有效建模静态时间测试的NPSKEW效应的系统和方法

    公开(公告)号:US20120084066A1

    公开(公告)日:2012-04-05

    申请号:US12894286

    申请日:2010-09-30

    IPC分类号: G06F17/50

    摘要: A computer-implemented method that simulates NPskew effects on a combination NFET (Negative Field Effect Transistor)/PFET (Positive Field Effect Transistor) semiconductor device using slew perturbations includes performing a timing test by a computing device, by: (1) evaluating perturb slews in Strong N/Weak P directions on the combination semiconductor device for a timing test result; (2) evaluation perturb slews in Weak N/Strong P directions on the combination semiconductor device for a timing test result; and (3) evaluating unperturbed slews in a balanced condition on the combination semiconductor device for a timing test result. After each test is performed, a determination is made as to which evaluation of the perturbed and unperturbed slews produces a most conservative timing test result for the combination semiconductor device. An NPskew effect adjusted timing test result is finally output based on determining the most conservative timing test result.

    摘要翻译: 使用摆动扰动模拟组合NFET(负场效应晶体管)/ PFET(正场效应晶体管)/ PFET(正场效应晶体管))半导体器件的NPskew效应的计算机实现的方法包括通过以下方式执行计算设备的定时测试:(1)评估干扰压摆 在组合半导体器件上以强N /弱P方向进行定时测试结果; (2)组合半导体器件的评估扰动在弱N /强P方向上的时序测试结果; 和(3)在组合半导体器件上对平衡状态下的非扰动压摆进行定时测试结果。 在执行每个测试之后,确定扰动和未扰动的压摆的哪个评估对组合半导体器件产生最保守的定时测试结果。 基于确定最保守的定时测试结果,最终输出NPskew效果调整的定时测试结果。

    Method for modeling variation in a feedback loop of a phase-locked loop
    7.
    发明授权
    Method for modeling variation in a feedback loop of a phase-locked loop 失效
    用于建模锁相环反馈环路变化的方法

    公开(公告)号:US08656207B2

    公开(公告)日:2014-02-18

    申请号:US12638060

    申请日:2009-12-15

    CPC分类号: H03L7/08

    摘要: A method performs statistical static timing analysis of a network that includes a phase-locked loop and a feedback path. The feedback path comprises a set of delays operatively connected from the output of the phase-locked loop back to the input of the phase-locked loop. One embodiment herein computes a statistical feedback path delay for the feedback path. The method can use a separate statistical parameter to represent random uncorrelated delay variation for each delay in the feedback path. The method also computes an output arrival time for the phase-locked loop based on the negative of the statistical feedback path delay.

    摘要翻译: 一种方法执行包括锁相环和反馈路径的网络的统计静态时序分析。 反馈路径包括从锁相环的输出到锁相环的输入可操作地连接的一组延迟。 这里的一个实施例计算反馈路径的统计反馈路径延迟。 该方法可以使用单独的统计参数来表示反馈路径中的每个延迟的随机不相关的延迟变化。 该方法还基于统计反馈路径延迟的负值计算锁相环的输出到达时间。