Patent ID: 7421671

Claim:
A method of analyzing a circuit simulation comprising: pruning a signal flow graph including: selecting a current vertex from a plurality of input vertices in the signal flow graph, wherein each one of the plurality of the input vertices is connected to a primary input of the signal flow graph; determining if the current vertex includes at least one of a sensitivity parameter or a sensitivity variable, wherein if the current vertex includes at least one of a sensitivity parameter or a sensitivity variable then: identifying the current vertex as being part of a sensitivity path; and adding the current vertex to a first sub-group of vertices; and determining if any remaining non-visited neighbor vertices remain to be analyzed, wherein if any remaining non-visited neighbor vertices remain to be analyzed then: selecting a neighboring vertex; and determining if the selected neighbor vertex is identified as a sensitivity path, wherein if the selected neighbor vertex is identified as a sensitivity path, then the first sub-group of vertices are output into a final pruned signal flow graph.