4.1. Transconductance of CNTFET SPICE model

Figure 8(a) and (b) shows the simulation results of frequency versus transconductance while the transconductance is increased linearly. This is as a result with μS through the stage of the lower frequency as well as mS through the stage of increasing frequency. Therefore, highfrequency small signal model of CNTFET is obtained in 10 THz with 1.8 mS. On analyzing the data, we first calculate and simulate the transconductance value in μS and in mS.

Figure 8(a) shows the plot for the value of transconductance in μS and Figure 8(b) shows the plot for the value of transconductance in mS.

Tables 1 and 2 show the selected values of transconductance necessary for the small signal model obtained from the analysis of the model as shown in Figure 8(a) and (b). By comparing the two tables, transconductance in mS performs the higher frequency rather than to use in μS. Therefore, we consider transconductance in mS in this research.
