Patent ID: 6925430
Filing Date: 2005-08-02
Classification: G06F

Abstract:
1. An apparatus for signal-waveform simulation, comprising: a model generation unit which generates a signal-analysis simulation model in accordance with high-frequency-circuit design information; a random-pattern analysis unit which generates and analyzes a dummy random-pattern waveform for transmitting the signal-analysis simulation model and a differential waveform corresponding to the dummy random-pattern waveform in accordance with a command including the bit information of a random-pattern waveform; a skew analysis unit which skews the random-pattern waveform or the differential waveform in accordance with a preset skew width; an eye-pattern analysis unit which generates an eye-pattern waveform by superimposing waveforms obtained by frame-dividing the random-pattern waveform or the differential waveform; and a determination unit which determines qualities of the eye-pattern waveform in accordance with a reference eye pattern and based on an area of an eye, wherein when it is determined that an eye portion of the eye-pattern waveform enters the reference eye pattern, the determination unit displays waveforms corresponding to an error bit and a plurality of bits before and after the error bit associated with the eye-pattern waveform.