| 摘要 |
A system, method, and software module for preventing a simulation and/or analysis of a circuit described in a netlist if a change in the circuit topology has been detected. The method entails scanning the netlist for circuit topology changes prior to performing the simulation or analysis on the circuit. If no change in the circuit topology has been detected, then the simulation or analysis of the circuit is allowed to proceed. If, on the other hand, a change in the circuit topology has been detected, then in some cases the simulation and/or analysis of the circuit is prevented. The methodology allows a prospective customer to perform simulation and/or analysis on a complicated circuit with a freely-distributed demo simulation program, and yet it does not rise to the software manufacturing giving away its software since the simulation and/or analysis is restricted to that particular circuit topology.
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