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Efficient Numerical Methods in Electronic Circuit Simulation

The CAD-based automatic generation of electrical network equations leads to differential-algebraic equations. To achieve a both efficient and reliable simulation tool, numerical integration software must be tailored to the special structure and properties of these systems. Hence alternatives to the classical BDF-approach are discussed. Numerical simulation results of a charge pump circuit show the merits of charge-oriented ROW-methods. 1 Introduction Numerical simulation in the time domain is an important tool in the design of electric circuits nowadays [10]. To be suitable for MOScircuits, a charge-oriented modeling is applied. Since the network equations of highly integrated circuits with thousands of elements cannot be derived analytically, commercial CAD-based simulation packages are used to generate the equations automatically. This approach, however, involves a redundant set of variables and thus results in differential-algebraic equations (DAEs). Granted by the Bayerische Fo..