University of Bologna

Dipartimento di Elettronica, Informatica e Sistemistica

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A New Multilevel Simulator for MOS Integrated Circuits

Zs. M. Kovacs-V. and A. Benedetti and S. Graffi and G. Masetti


A novel Multilevel Simulator for the analysis and design of IC's at the device level (MUSIC) is presented. The simulation technique is based on a circuit decomposition into hierarchic subcircuits, followed by a multilevel Newton equation solution. The key feature addressed in this methodology is the control on the information propagated in the circuit to avoid unrealistic boundary conditions when the subcircuits are considered. The code, which in the current version can analyze DC sweeps, has an input format fully compatible with SPICE and eliminates the numerical overflow and slow convergence problems, due to numerical propagation of externally applied node voltages, often encountered in the simulation of large MOS IC's with SPICE. The simulation results of chains of inverters and full-adders are reported.

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