Patent ID: 7908577

Claim:
An apparatus for analyzing circuit specification description design, the apparatus being a computer system, comprising: a circuit specification description inputting section in which a circuit specification description is inputted as well as analyzes and obtains information of two or more signals involved in signal variation, information of a maximum number of cycles in the two or more signals, and a definite value in a definitive site defined in the circuit specification description for the two or more signals contained in the circuit specification description; a signal variation data generating section for generating signal variation data in a table format corresponding to the number of the two or more signals and the maximum number of cycles obtained in the circuit specification description inputting section and indicating time-series signal variation, wherein the definite value is set in the definitive site defined in the circuit specification description and a predetermined flag is set in a site where the value is not defined in the signal variation data; and a waveform diagram data outputting section that outputs waveform diagram data for displaying the time-series signal variation in a form of a waveform diagram on a display device having a display screen on the basis of the definite value set in the generated signal variation data and the predetermined flag.