Data processing: structural design – modeling – simulation – and em – Simulating electronic device or electrical system – Circuit simulation
Reexamination Certificate
2006-07-18
2006-07-18
Rodriguez, Paul L. (Department: 2123)
Data processing: structural design, modeling, simulation, and em
Simulating electronic device or electrical system
Circuit simulation
C703S015000, C703S019000
Reexamination Certificate
active
07079997
ABSTRACT:
A debugger produces a display based on instructions executed by a circuit simulator or verification tool and on waveform data produced by the simulator or verification tool when executing the instructions. The instructions include a set of statements, each corresponding to a separate circuit signal generated by a circuit and each including a function defining a value of the circuit signal as a function of values of other circuit signals. The simulator evaluates the statements at various simulation times to compute signal values at those simulation times. The waveform data indicates signal values the simulator computes when evaluating the statements. The debugger display includes a set of statement event symbols, each corresponding to a separate evaluation of a statement and each positioned in the display to indicate a simulation time at which the simulator evaluated the statement. Each statement event symbol references the signal whose value is computed by the corresponding statement evaluation and indicates a value of that signal computed when the statement was evaluated. Each statement event symbol also references the other signals having values of which the statement indicates the computed signal value is a function and indicates those other signals values as of the simulation time at which the statement was evaluated.
REFERENCES:
patent: 5220512 (1993-06-01), Watkins et al.
patent: 5634003 (1997-05-01), Saitoh et al.
Changfan Chieh
Chen Yirng-An
Ho Kunming
Hsu Yu-Chin
Jong Wells Woei-Tzy
Bedell Daniel J.
Novas Software Inc.
Proctor Jason
Rodriguez Paul L.
Smith-Hill and Bedell
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