Figure 19. (a) CNTFET based CO (b) symbol used for CNTFET
Figure 19 shows a 32nm CNTFET based integer order CO. Keeping all other
parameters same and just varying the inductor values, the oscillation
frequency increases from 1.3GHz and 13.11 GHz for L=100p and L=1p
respectively. This can be validated from the bode plots for both the
inductor values individually, as shown in Figure 20. Compared to its MOS
integer topology, an increase in oscillation frequency is observed in
it. The oscillation frequencies achieved for the proposed integer order
CNTFET based CO for L=100pH and L=1pH, with C1=C2=0.3n are 1.3GHz and
13.11 GHz respectively.