FastSpice circuit partitioning to compute DC operating points preserving Spice -like simulators accuracy
| Autor: | G. Storti Gajani, Angelo Brambilla, Federico Bizzarri |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Polynomial
Computer science Circuit partitioning Circuit simulation DC analysis FASTSPICE Spice Software Modeling and Simulation Hardware and Architecture Hardware_PERFORMANCEANDRELIABILITY 010103 numerical & computational mathematics 02 engineering and technology 01 natural sciences Computational science Modeling and simulation Set (abstract data type) Computer Science::Hardware Architecture symbols.namesake Computer Science::Emerging Technologies Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering 0101 mathematics Electronic circuit Function (mathematics) 020202 computer hardware & architecture Jacobian matrix and determinant symbols Voltage |
| Zdroj: | Simulation Modelling Practice and Theory. 81:51-63 |
| ISSN: | 1569-190X |
| DOI: | 10.1016/j.simpat.2017.12.001 |
| Popis: | FastSpice techniques are considered in this paper and in particular partitioning methods that split a large circuit in a set of smaller sub-circuits to quickly and accurately compute a dc solution. Each sub-circuit contributes to a set of Jacobian matrices with reduced dimensions that are more efficiently LU-factorised during the iterations of the solving methods. As a matter of fact, the numerical effort required by factorisation is a non linear (polynomial) function of the matrix dimension. We describe the use of voltage and current probes that can be inserted to “virtually” tear nodes and branches of the original circuit to further improve circuit splitting. The proposed techniques do not alter the accuracy of the simulation and thus we obtain FastSpice performances while keeping Spice accuracy. This can be a key issue in simulating circuits designed with deep-submicron technologies. Simulation performances of the proposed approach are compared with those of modern commercial full-chip FastSpice and Spice -like simulators. |
| Databáze: | OpenAIRE |
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