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
Next: 22.214.171.124 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