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Coupling algorithms for mixed-level circuit and device simulation

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2 Author(s)
Mayaram, K. ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; Pederson, Donald O.

A general framework for mixed-level circuit and device simulation is described. This framework was used in the development of the simulation program CODECS (coupled device and circuit simulator). Various algorithms to couple the device and circuit simulators for DC and transient analyses have been implemented in CODECS. These algorithms are evaluated based on their convergence properties and run-time performance. This study provides guidelines for choosing a particular coupling algorithm. A modified two-level Newton algorithm is used for DC analysis, whereas a full block-LU decomposition algorithm is used for transient analysis. This combination of algorithms provides reasonable convergence and run-time performance. A simple latency scheme provides a 50% speedup. Coupling for small-signal AC and pole-zero analyses are described

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:11 ,  Issue: 8 )