Design of a Low Power Complementary Current Controlled Skewed Delay Voltage Controlled Oscillator using CNTFET

Abstract

This paper presents a four staged voltage-controlled ring oscillator (VCO) operating in wide range of frequency that consumes low power, improves the performance and provides stability to the circuit. Due to the limitation of MOSFET that they cannot be scaled down after certain range due to some of its limitations such as high power and leakage current. To overcome the drawback, we used CNTFET technology that uses Carbon Nano Tubes in place of silicon. The VCO that is made in this paper using CNTFET operates in Terahertz frequency range varying from 0.331 THz to 0.091 THz and similarly the power dissipated ranges from 0.9565 to 0.2506 mW for control Voltage of 0 to 1 volts. The proposed VCO shows 97.7% improvement in power dissipation 99.4% increase in the frequency range in comparison to the VCOs based on CMOS technology. VCO produces a sinusoidal waveform and we checked the correctness of our design by verifying the waveform produced and simulated results.