Method and apparatus for generating test patterns for use in at-speed testing
    32.
    发明授权
    Method and apparatus for generating test patterns for use in at-speed testing 有权
    用于生成用于速度测试的测试模式的方法和装置

    公开(公告)号:US08176462B2

    公开(公告)日:2012-05-08

    申请号:US12464025

    申请日:2009-05-11

    IPC分类号: G06F11/22 G06F17/50

    摘要: In one embodiment, the invention is a method and apparatus generating test patterns for use in at-speed testing. One embodiment of a method for use by a general purpose computing device that is configured to generate a set of test patterns with which to test an integrated circuit chip includes receiving, by an input device of the general purpose computing device, statistical timing information relating to the integrated circuit chip and a logic circuit of the integrated circuit chip and generating, by a processor of the general purpose computing device, the set of test patterns in accordance with the statistical timing information while simultaneously selecting a set of paths on which to test the set of test patterns.

    摘要翻译: 在一个实施例中,本发明是产生用于在速测试中的测试图案的方法和装置。 由通用计算设备使用的方法的一个实施例被配置为生成用于测试集成电路芯片的一组测试图案,包括由通用计算设备的输入设备接收与 所述集成电路芯片和所述集成电路芯片的逻辑电路,并且由所述通用计算设备的处理器根据所述统计定时信息生成所述一组测试图案,同时选择一组在其上测试的路径 一套测试模式。

    METHOD AND APPARATUS FOR COVERING A MULTILAYER PROCESS SPACE DURING AT-SPEED TESTING
    34.
    发明申请
    METHOD AND APPARATUS FOR COVERING A MULTILAYER PROCESS SPACE DURING AT-SPEED TESTING 有权
    用于在速度测试期间覆盖多层过程空间的方法和装置

    公开(公告)号:US20100162064A1

    公开(公告)日:2010-06-24

    申请号:US12340072

    申请日:2008-12-19

    IPC分类号: G01R31/28 G06F11/00

    CPC分类号: G01R31/2882

    摘要: In one embodiment, the invention is a method and apparatus covering a multilayer process space during at-speed testing. One embodiment of a method for selecting a set of paths with which to test a process space includes determining a number N of paths to be included in the set of paths such that at least number M of paths in N for which testing of the process space will fail, computing a metric that substantially ensures that the set of paths satisfies the requirements of N and M, and outputting the metric for use in selecting the set of paths.

    摘要翻译: 在一个实施例中,本发明是在高速测试期间覆盖多层工艺空间的方法和装置。 用于选择用于测试处理空间的一组路径的方法的一个实施例包括确定要包括在路径集合中的路径数量N,使得至少数目M的路径在其中用于对进程空间进行测试 将会失败,计算基本上确保路径组满足N和M要求并输出用于选择路径集合的度量的度量。

    METHOD AND APPARATUS FOR EFFICIENT INCREMENTAL STATISTICAL TIMING ANALYSIS AND OPTIMIZATION
    35.
    发明申请
    METHOD AND APPARATUS FOR EFFICIENT INCREMENTAL STATISTICAL TIMING ANALYSIS AND OPTIMIZATION 有权
    有效增量统计时序分析与优化的方法与装置

    公开(公告)号:US20100088658A1

    公开(公告)日:2010-04-08

    申请号:US12244512

    申请日:2008-10-02

    IPC分类号: G06F17/50

    摘要: In one embodiment, the invention is a method and apparatus for efficient incremental statistical timing analysis and optimization. One embodiment of a method for determining an incremental extrema of n random variables, given a change to at least one of the n random variables, includes obtaining the n random variables, obtaining a first extrema for the n random variables, where the first extrema is an extrema computed prior to the change to the at least one of the n random variables, removing the at least one of the n random variables to form an (n−1) subset, computing a second extrema for the (n−1) subset in accordance with the first extrema and the at least one of the n random variables, and outputting a new extrema of the n random variables incrementally based on the extrema of the (n−1) subset and the at least one of the n random variables that changed.

    摘要翻译: 在一个实施例中,本发明是一种用于有效增量统计时序分析和优化的方法和装置。 给定对n个随机变量中的至少一个的改变的用于确定n个随机变量的增量极值的方法的一个实施例包括获得n个随机变量,获得n个随机变量的第一极值,其中第一极值是 在对所述n个随机变量中的至少一个随机变量进行改变之前计算的极值,去除所述n个随机变量中的所述至少一个以形成(n-1)子集,计算所述(n-1)子集的第二极值 根据第一极值和n个随机变量中的至少一个,并且基于第(n-1)个子集的极值和n个随机变量中的至少一个来递增地输出n个随机变量的新的极值 改变了。

    SYSTEM AND METHOD FOR GENERATING AT-SPEED STRUCTURAL TESTS TO IMPROVE PROCESS AND ENVIRONMENTAL PARAMETER SPACE COVERAGE
    36.
    发明申请
    SYSTEM AND METHOD FOR GENERATING AT-SPEED STRUCTURAL TESTS TO IMPROVE PROCESS AND ENVIRONMENTAL PARAMETER SPACE COVERAGE 有权
    用于产生速度快速结构测试以改进过程和环境参数空间覆盖的系统和方法

    公开(公告)号:US20090119629A1

    公开(公告)日:2009-05-07

    申请号:US11934146

    申请日:2007-11-02

    IPC分类号: G06F17/50

    CPC分类号: G06F11/24 G01R31/31835

    摘要: A system for enhancing the practicability of at-speed structural testing (ASST). In one embodiment, the system includes first means for performing statistical timing analysis on a design of logic circuitry. A second means performs a criticality analysis on the logic circuitry as a function of the statistical timing analysis so as to determine a criticality probability for each node of the logic circuitry. A third means selects nodes of the logic circuitry as a function of the criticality analysis. A fourth means selects timing paths as a function of the criticality probabilities of the selected nodes. A fifth means generates an ASST pattern for each of the selected timing paths. A sixth mean is provided to perform ASST on a fabricated instantiation of the design at functional speed using the generated ASST pattern.

    摘要翻译: 一种提高高速结构测试(ASST)实用性的系统。 在一个实施例中,系统包括用于对逻辑电路的设计执行统计时序分析的第一装置。 第二种方法是根据统计时序分析对逻辑电路执行关键性分析,以确定逻辑电路的每个节点的临界概率。 第三种方法是选择逻辑电路的节点作为关键性分析的函数。 第四种装置根据所选节点的临界概率来选择定时路径。 第五装置为每个所选定时路径生成ASST模式。 提供了第六个平均值,以使用所生成的ASST模式在功能速度上对制造的设计实例化执行ASST。

    Method, system, and program product for computing a yield gradient from statistical timing
    37.
    发明授权
    Method, system, and program product for computing a yield gradient from statistical timing 有权
    用于从统计时序计算产量梯度的方法,系统和程序产品

    公开(公告)号:US07480880B2

    公开(公告)日:2009-01-20

    申请号:US11358622

    申请日:2006-02-21

    IPC分类号: G06F17/50 G06F17/10

    摘要: The invention provides a method, system, and program product for determining a gradient of a parametric yield of an integrated circuit with respect to parameters of a delay of an edge of a timing graph of the circuit. A first aspect of the invention provides a method for determining a gradient of a parametric yield of an integrated circuit with respect to parameters of a delay of an edge of a timing graph of the circuit, the method comprising: conducting a statistical timing analysis; expressing a statistical circuit delay in terms of a delay of the edge; and computing a gradient of the statistical circuit delay with respect to parameters of the delay of the edge.

    摘要翻译: 本发明提供了一种方法,系统和程序产品,用于相对于电路的时序图的边沿的延迟的参数来确定集成电路的参数收益率的梯度。 本发明的第一方面提供了一种用于根据电路的时序图的边沿的延迟的参数来确定集成电路的参数收益率的梯度的方法,所述方法包括:执行统计时序分析; 根据边缘的延迟表示统计电路延迟; 以及计算相对于边缘的延迟的参数的统计电路延迟的梯度。

    Method of measuring the impact of clock skew on slack during a statistical static timing analysis
    38.
    发明授权
    Method of measuring the impact of clock skew on slack during a statistical static timing analysis 有权
    在统计静态时序分析期间测量时钟偏移对松弛影响的方法

    公开(公告)号:US08578310B2

    公开(公告)日:2013-11-05

    申请号:US12857591

    申请日:2010-08-17

    IPC分类号: G06F9/455 G06F17/50

    CPC分类号: G06F17/5031 G06F2217/84

    摘要: Computing accurately and effectively the impact of clock skew on statistical slack in the presence of statistically variable timing quantities that accounts for both common path credit in the common portion of the clock tree, and RSS credit in the non-common of the clock tree. The clock skew is measured on a per launch and capture path-pair basis as a function of on the post-CPPR path-specific slack (including RSS credit), total mean value of latch-to-latch delay, RSS value of random latch-to-latch delay, test guard time and test adjust. The method includes: performing an initial block-based SSTA including CPPR analysis; selecting at least one launch and capture path-pair for skew analysis; for the at least one path pair, recording post CPPR slack, total mean value of latch-to-latch delay, RSS value of latch to latch delay, test guard time and test adjust; and quantifying the impact of clock skew on statistical slack thereof.

    摘要翻译: 计算时钟偏差对统计松弛的影响,存在统计上可变的时序量,这些时间量占时钟树共同部分的公共路径信誉,以及时钟树非共同的RSS信用。 时钟偏移在每个发射和捕获路径对的基础上测量,作为后CPPR路径特定松弛(包括RSS信用),锁存到锁存延迟的总平均值,随机锁存的RSS值的函数 到锁定延迟,测试保护时间和测试调整。 该方法包括:执行初始的基于块的SSTA,包括CPPR分析; 选择至少一个启动和捕获路径对进行​​偏差分析; 对于至少一个路径对,记录后CPPR松弛,锁存到锁存延迟的总平均值,锁存器的RSS值到锁存延迟,测试保护时间和测试调整; 并量化时钟偏移对其统计松弛的影响。