| 摘要 |
Technique to improve circuit level simulation speed through the block characterization of the RC network based on the AWE (Asymptotic Waveform Evaluation) is proposed. Since the numbers of RC network of the recent VLSI circuit becomes huge, the complexities of them are the most difficult and time-consuming task in the circuit verification. In addition to the increasing size of the RC networks, the accuracy is another big concern in the circuit simulation and verification. To have the speed while maintaining the accuracy in the circuit simulation, abstraction by block characterization is devised, implemented, and benchmarked. It first extracts transfer equation from the complex RC networks by applying AWE, modeled them as simple pi-model, then find effective capacitance. The effective capacitance is modeled as pin capacitance of the input of the block, the transfer equation is modeled as a function of the between pins in the block. Converting the RC network into block and computing matrix with block, instead of RC network, can reduce the time to solve the matrix by the two orders of time while keeping the accuracy.
|
