Low power VCO using Gm-Boosting technique for optical pulse trains application

This letter presents a 0.7V low power Voltage Control Oscillator (VCO) is designed and implemented in a 0.18µm COMS 1P6M process. This circuit is using Gm-Boosting technique that can reduce power consumption. At the supply voltage 0.7V, the output frequency is 2.228GHz and the phase noise is −121.56 dBc/Hz at 1MHz offset. Tuning range is about 113MHz(4.9%) between 2.228 to 2.341GHz while control voltage was tuned from 0 to 2V. Excluding output buffers the VCO consumes the power 0.7 mW under a standard supply of 0.7 V for optical pulse trains application.