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    • 6. 发明授权
    • Method and program for designing semiconductor integrated circuits to optimize clock skews on plurality of clock paths
    • 用于设计半导体集成电路以优化多个时钟路径上的时钟偏移的方法和程序
    • US07047504B2
    • 2006-05-16
    • US10369535
    • 2003-02-21
    • Tetsuo Kawano
    • Tetsuo Kawano
    • G00F17/50
    • G06F17/5031G06F17/5045
    • A method for designing semiconductor integrated circuits that efficiently optimizes clock skews in a plurality of clock modes in the case of designing semiconductor integrated circuits having a plurality of clock modes. A plurality of clock paths in each of a plurality of clock modes are detected from layout data for a semiconductor integrated circuit. Delay time in all elements on each of the plurality of clock paths detected is collected. A delay adjustment position is set on each of the plurality of clock paths detected. An optimum delay value at the delay adjustment position on each of the plurality of clock paths is calculated by considering delay time at the set delay adjustment position as a nonnegative variable, by formulating a linear expression for each of the plurality of clock paths by use of this variable and the collected delay time in all of the elements, and by working out the linear expression. Circuit structure based on the layout data is corrected automatically by locating a delay element having appropriate delay time at each delay adjustment position on the basis of the delay value calculated.
    • 在设计具有多个时钟模式的半导体集成电路的情况下,设计有效地优化多个时钟模式中的时钟偏差的半导体集成电路的设计方法。 从半导体集成电路的布局数据检测多个时钟模式中的每一个中的多个时钟路径。 收集所检测到的多个时钟路径中的每一个上的所有元素的延迟时间。 在检测到的多个时钟路径中的每一个上设置延迟调整位置。 通过考虑在设定的延迟调整位置处的延迟时间作为非负变量来计算在多个时钟路径中的每一个上的延迟调整位置处的最佳延迟值,通过使用多个时钟路径中的每一个通过使用 该变量和收集的所有元素的延迟时间,并通过求出线性表达式。 基于布局数据的电路结构通过基于所计算的延迟值定位在每个延迟调整位置具有适当延迟时间的延迟元件来自动校正。