Circuits Design Low-Phase Noise Colpitts VCO with Gm-Boosting

This article proposes a low voltage, optimized tuning range and phase noise voltage-controlled oscillator (VCO) adopting colpitts architecture and using gm boosting technique for 5.8 GHz applications. Measured consequences of the Colpitts VCO circuit exhibit the tuning range of 5.29 to 6.07 GHz as well as phase noise of -123.4 dBc/Hz at 1 MHz frequency offset and product power of -6.67dBm under 5.73 GHz. The power consumption of the core circuit is 4.7mW from supply voltage of 1V. The proposed overall chip (die size = 0.6 x 0.6 mm
²
) is fabricated in tsmc 0.18μm CMOS 1P6M process.