Analysis of the impact of CNTFET model parameters on its transfer and output characteristics

The influence of internal parameters on transfer and output characteristics of a Carbon Nanotube Field Effect Transistor are studied in this paper. For the purposes of the study a CNTFET compact model is used. The compact CNTFET model is coded in Verilog-A and it is simulated in Cadence Spectre circuit simulator. In particular, we have examined how the transfer and output characteristics are altering when changing single parameters or sets of parameters. To compare the simulations results a cost function consisting of the two parameters is employed to quantify the impact of 430 model parameters. The sum of total 430 model parameters are examined and 59 are found to have negligible or no impact on output static characteristics. Three groups of internal model parameters have been recognized, according to their impact on output static characteristics.