Parameter Determination

  • Henk C. de Graaff
  • François M. Klaassen
Part of the Computational Microelectronics book series (COMPUTATIONAL)


A good set of parameters is as important as a good model; the most accurate model will perform badly if the parameter values are not correct. Unfortunately, the set of parameter values is not unique, which means that there are other parameter sets possible that give more or less the same fit to the measured characteristics. This is mainly caused by the fact that the various device phenomena, as described by certain parameters, cannot always be distinguished clearly from each other in the measured characteristics. As examples we may mention quasi-saturation and high injection in the base, or Early effect and avalanche multiplication in bipolar transistors, and static feedback and channel length modulation in MOS transistors. This also means that usually not all compact model parameters are independent from each other: the value given to one parameter may influence the value of another. The final judgement whether a parameter set is good enough lies in the fit to the measurements and in their physical plausibility.


Bipolar Transistor Parameter Extraction Gate Bias Parameter Determination Drain Bias 


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Copyright information

© Springer-Verlag/Wien 1990

Authors and Affiliations

  • Henk C. de Graaff
    • 1
  • François M. Klaassen
    • 1
  1. 1.Philips Research LaboratoriesEindhovenThe Netherlands

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