Topic summary
Transistor models
Extracted from the Wikipedia article Transistor model.
Models for circuit design
Transistor models are used for almost all modern electronic design work. Analog circuitsimulators such as SPICE use models to predict the behavior of a design. Most design work is related to integrated circuit designs which have a very large tooling cost, primarily for the photomasks used to create the devices, and there is a large economic incentive to get the design working without any iterations. Complete and accurate models allow a large percentage of designs to work the first time.