CONCLUSION
In this work we initially design a Si-MOS based CO in both integer and
fractional topologies. Pseudo-capacitances with various fractional
orders have been designed and used in the tank circuit of CO. The
variation of oscillator properties with fractional order has been
discussed in detail. CO made using FOC’s consumed comparatively more
power and noise. Thus, an optimal design of CO has been made using
CNTFET. The CNTFET based CO consumes much less power compared to both
conventional and fractional silicon based oscillators. To tap the
advantages of CNTFET and fractional circuitry a CNTFET based fractional
order CO is designed and simulated. The CNTFET fractional CO along with
low power consumption exerted a greater control over phase and
oscillation frequency by changing the fractional order, α. It has been
shown through SPICE and MATLAB simulations that the fractional
oscillator based on CNTFET outperforms MOS based fractional oscillator
in achieving a wider CPZ for the same fractional order.