A model for carbon nanotube FETs in the ballistic limit
As we know, a ballistic MOS-Like carbon nanotube FET can be simulated by using a self-consistent procedure between the charge and the Poisson equations. Because of the integral form of the charge equation, this model cannot be implemented in the commercially available circuit simulators, such as SPICE. In this paper, we propose an analytical solution for estimating the charge equation, so that the above mentioned procedure could be used in the aforementioned circuit simulators. We investigated the accuracy of the proposed model for various values of the physical parameters and biasing condition. Further investigations were performed in order to evaluate the model accuracy in the sub-threshold region and in presence of the short channel effects. The results of these investigations were compared with those obtained by some other models developed earlier in the literatures. All of these demonstrate superior accuracy of the proposed model with comparison to the other models.
modeling carbon nanotube field effect transistor fettoy