Download The AC/DC Module User's Guide - Numerical Modelling Laboratory

Theory for the Electrical Circuit
Interface
The Electrical Circuit Interface theory is discussed in this section:
• Electric Circuit Modeling and the Semiconductor Device Models
• NPN Bipolar Transistor
• n-Channel MOS Transistor
• Diode
• References for the Electrical Circuit Interface
Electric Circuit Modeling and the Semiconductor Device Models
Electrical circuit modeling capabilities are useful when simulating all sorts of electrical
and electromechanical devices ranging from heaters and motors to advanced plasma
reactors in the semiconductor industry. There are two fundamental ways that an
electrical circuit model relates to a physical field model.
- Either the field model is used to get a better, more accurate description of a single
device in the electrical circuit model or
- the electrical circuit is used to drive or terminate the device in the field model in
such a way that it makes more sense to simulate both as a tightly coupled system.
The Electrical Circuit interface makes it is possible to add nodes representing circuit
elements directly to the model tree in a COMSOL Multiphysics model. The circuit
variables can then be connected to a physical device model to perform co-simulations
of circuits and multiphysics. The model acts as a device connected to the circuit so that
its behavior is analyzed in larger systems.
THEORY FOR THE ELECTRICAL CIRCUIT INTERFACE
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