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    • 4. 发明授权
    • Efficient tracing of shorts in very large nets in hierarchical designs
    • 在分层设计中,在非常大的网络中有效追踪短裤
    • US06263480B1
    • 2001-07-17
    • US09238420
    • 1999-01-28
    • Ronald Allen BartelsUlrich Alfons Finkler
    • Ronald Allen BartelsUlrich Alfons Finkler
    • G06F1750
    • G06F17/5077G06F17/5022
    • Tracing a short as a shortest path of explicit Very Large Scale Integrated (VLSI) circuit design component instances between two VLSI design component instances with different net names in a hierarchical design is a non-hierarchical problem. The method described in this document computes an approximation for the shortest path of VLSI design component instances taking full advantage of the hierarchical structure of the design. For the resulting path it is guaranteed that it contains at least one of the VLSI design component instances that cause the short. For each individual cell a Shortest Path Search (SPS) can be applied. In comparison to prior flat searches, which required unfeasible amounts of storage and computation time on large nets, this solution requires asymptotically not more storage and computation time than other forms of hierarchical VLSI checking tasks.
    • 跟踪一个简短的路径,作为层次设计中具有不同网络名称的两个VLSI设计组件实例之间的显式超大规模集成(VLSI)电路设计组件实例的最短路径是非分层问题。 本文中描述的方法计算VLSI设计组件实例的最短路径的近似值,充分利用设计的层次结构。 对于生成的路径,保证它至少包含一个引起短路的VLSI设计组件实例。 对于每个单独的单元格,可以应用最短路径搜索(SPS)。 与先前的平面搜索相比,这在大网络上需要不可行的存储量和计算时间,与其他形式的分层VLSI检查任务相比,该解决方案渐渐地不需要更多的存储和计算时间。