Tuning Range Enhancement using Current Boosting in Common Source Amplifier based Ring Oscillator

In this work, Tuning Range of Common Source (CS) Amplifier based Ring Oscillator is enhanced by using Current boosting MOSFET. CS Amplifier based ring Oscillator is designed and simulated with and without current boosting MOSFET in GPDK45 nm CMOS technology under the power supply limitation of 1.1 V. Tuning range of 470 MHz to 16.74 GHz is achieved without using the aforementioned technique whereas tuning range of 308 MHz to 41.75 GHz is achieved by utilizing the Current boosting method. Phase noise and Total Harmonic Distortion (THD) parameters are also measured for both the VCO's, along with power consumption at oscillation frequency. Performance of the ring oscillators are checked across various process corners, supply voltage fluctuations and temperature variations.