“A 5.5 GHz Voltage Control Oscillator (VCO) with a Differential Tunable Active and Passive Inductor”, IJIEE, vol. 3, no. 5, pp. 493–497, Sep. 2013, Accessed: Oct. 26, 2026. [Online]. Available: https://ijiee.org/index.php/ijiee/article/view/732