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CNTFET based Single Ended Fractional Order Colpitts Oscillator: Design, Simulation and Comparative Analysis
  • Sajad Loan,
  • Ankita Bhatt
Sajad Loan
Jamia Millia Islamia

Corresponding Author:[email protected]

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Ankita Bhatt
BK Birla Institute of Engineering and Technology Department of Electronics and Communication Engineering
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In this paper, we design and simulate single ended Colpitts Oscillator (CO) in integer and fractional order domains. The oscillators are realized in 32 nm node conventional MOSFET and carbon nanotube field effect transistors (CNTFET) technologies. Therefore, four COs have been designed, simulated and rigorously compared. These include integer order conventional MOSFET based CO, fractional order MOSFET based CO, CNTFET based integer order CO and CNTFET based fractional order CO, all based on 32 nm technology nodes. The fractional order approach has been used as it results in better control over the phase and frequency of the oscillator. Herein fractional order capacitors of various orders, used in realizing the fractional order COs, are realized and their frequency responses are studied. This is being done to ensure whether the designed pseudo-capacitances have fractional behavior or not in the desired frequency and phase spectrum. It has been observed that the variation of fractional order (α) from 0.4 to 0.81 has resulted in a slight reduction of oscillation frequency from 1.68GHz (α=0.4) to 1.351GHz (α=0.81) keeping the pseudo-capacitance same at 0.3nF in MOS based topology. Further, CNTFET based integer order as well as fractional order COs have been designed to address the power consumption and the complexity issues of the fractional order COs. The CNTFET based fractional order CO retains the advantages of fractional order domain as well as power efficiency of CNTFETs. Furthermore, it has been observed that integrating fractional order capacitor (FOC) with the CNTFET CO results in much larger constant phase zone (CPZ), an important performance measuring parameter. A rigorous comparative analysis of the four COs designed in this work has been performed.
28 Aug 2023Submitted to International Journal of Numerical Modelling: Electronic Networks, Devices and Fields
29 Aug 2023Assigned to Editor
29 Aug 2023Submission Checks Completed
29 Aug 2023Review(s) Completed, Editorial Evaluation Pending
01 Sep 2023Reviewer(s) Assigned
18 Nov 2023Editorial Decision: Revise Major