Design of low-voltage low-power 40-GHz CMOS VCO

This paper presents a low power consumption LC-tank voltage controlled-oscillator (VCO). It is suitable for communication system of Integrated circuit. In this circuit, the operating frequency is generated by LC-tank. The circuit add a forward-bias circuit at the body to decrease the threshold voltage. Therefore, it can reduce the operation voltage and minimize the dc power consumption. This design was simulated by using TSMC 0.18-μm CMOS process. According to the simulation results, the power consumption is 4.5 mW with a 0.7-V supply voltage. At the 40-GHz operation frequency, the phase noise is -101 dBc/Hz at 1-MHz offset from the carrier frequency. In addition, the simulated output power is -25.8 dBm, and the FoM is - 186.5 dBc/Hz.