【摘要】 本文提出了一种对VLSI故障模拟新方法——扇出点模拟法。此法是将电路从每个扇出点割断,形成一组无扇出的树型子电路,根节点为原始输出节点或扇出节点,只对树根节点进行模拟。在给定测试码前提下,如果树根节点可测,则该树型子电路为可测树,按树型电路直接写出这棵树的全部可测故障;如果树根节点不可测,则该树型子电路为不可测树,不存在任何可测故障。本方法可以在现有的平行模拟系统上稍加修改便能使用。更多还原

【Abstract】 A new method for fault simulation is presented, by which every fanout point is cut to form a set of fanout-free tree-shaped circuits and the tree roots are primary outputs and fanout points. The principle of the method is to simulate only the root nodes using parallel simulation. If a root node is detectable, find out directly all the detectable faults in it. If not, there is no detectable fault. This method is about k times faster than the existing parallel simulation methods in every test pattern, where k = n/m, and n, m are the number of all nodes and fanout points in the circuit respectively.更多还原