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5.3.2 Fitting Procedure
 
In the previous section the most critical parameters for the intrinsic gm max have been identified. The results are also applicable to the extrinsic characteristics. The basic problem of the fitting procedure is, that the set of unknowns is large enough that a given characteristics can be modeled by different combinations of geometry and model parameters. For instance a certain current density j can be obtained by different products of carrier concentrations and velocities . Therefore as many as possible different characteristics have to be modeled with one consistent set of parameters to get confidence for a simulation set up.

The characteristics used in the following are the drain current and the gate capacitances versus the terminal voltages as well as electron transport properties obtained from Monte Carlo simulations. This way important parameters can be separated from each other and uncertainties can be reduced substantially.
 



next up previous contents
Next: 5.3.2.1 Simulation of the Transfer Characteristics Up: 5.3 Determination of the Parameter Set for the Simulation Previous: 5.3.1 Identification of the Most Critical Parameters

Helmut Brech
1998-03-11