Tuned voltage controlled oscillator using quantum dot transistor

This paper presents a new technique for tuning the oscillation frequency of the VCO. The proposed VCO technique accomplishes wide tuning by utilizing a quantum dot transistor as a tunable capacitor. The capacitance of the quantum dot transistor is changed by controlling the quantum dot charges that lead to varying the threshold voltage. The results show that a wide oscillation frequency range is achieves. The oscillation frequency is tuned from 19.13 GHz to 27.18 GHz, tuning of 42%, as the quantum dot transistor threshold shift varies by 0.7 V.