Object-Oriented Electronic Circuit Modeling Using Dymola

Daryl Hild
Lead Security Engineer
Applied Secure Systems Engineering (G021)
The MITRE Corp.
1155, Academy Park Loop
Colorado Springs, Colorado, 80910-3704
U.S.A.
Phone: +1(719)572-8492
Email: DHild@Mitre.Org
François E. Cellier
Institute of Computational Science
ETH Zürich
CH-8092 Zürich
Switzerland
Email: FCellier@Inf.ETHZ.CH

Abstract

In this paper, an alternative to Spice as an electrical circuit modeling and simulation tool is explored. Spice has been a very popular automated circuit analysis tool of industry and universities, alike. A new modeling tool, Dymola, supports object-oriented modeling and can generate state-space models for simulation in several different simulation languages: ACSL, Desire, Simnon, SimuLink, and DSblock. In Dymola, objects are mathematically modeled as implicitly described sets of ordinary differential equations. Dymola objects may then be interconnected to form more complex systems.

This paper develops a library of PNP and NPN bipolar junction transistor models, and investigates use of the transistor models as subcomponents to more complex circuits such as operational amplifiers. The simulation results are compared to those obtained from two Spice dialects, and are discussed in terms of accuracy, efficiency, and flexibility.

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