AUGMENTED SIMULATION METHOD FOR WAVEFORM PROPAGATION IN DELAY CALCULATION

摘要

A system and a method are disclosed for performing static timing analysis. Information describing a distorted input waveform is received by a static timing analyzer. A transition time of the distorted input waveform is determined. Based on the determined input transition time a nominal input waveform and a corresponding nominal output waveform are received. An input waveform distortion is computed based on the nominal input waveform and the distorted input waveform. An output waveform distortion is computed based on an augmented circuit and the input waveform distortion. A distorted output waveform is computed based on the nominal output waveform and the output waveform distortion. The waveforms are represented using the distortion values which are smaller than the actual waveform values, thereby allowing for compact representation. A time-shifted version of an uncoupled input waveform is used to perform conservative timing analysis of circuits that accounts for crosstalk in the circuit.

主权项

1. A method for performing static timing analysis comprising:
receiving information describing a distorted input waveform, the distorted input waveform received as input to a cell of a circuit for performing timing analysis of the circuit; determining a transition time of the distorted input waveform; receiving information describing a nominal input waveform based on the determined transition time and a corresponding nominal output waveform, the nominal output waveform representing output of the cell of the circuit; computing an input waveform distortion based on the nominal input waveform and the distorted input waveform; and computing an output waveform distortion for the output of the cell of the circuit based on an augmented circuit corresponding to the cell and the input waveform distortion.