A low power and wide frequency range voltage controlled oscillator with quadrature outputs

This paper presents a novel wide frequency range QVCO. Not having utilized any passive inductor (spiral) the chip area decreases dramatically. This miniaturization is aimed mostly to be beneficial in the Bioengineering or clock recovery circuit applications. The design is implemented with the use of Cadence SpectreRF (TSMC 0.18 mum) technology, 1.8 volt supply voltage. The operational frequency from 2.41 GHz to 6.85 GHz is obtained. Power consumption of 6.87 mW at 2.41 GHz and 12.78 mW at 5 GHz is achieved. Phase noise at 1 MHz offset for 2.41 GHz and 5 GHz quadrature oscillation is at -106.5 dBc/Hz and -87.29 dBc/Hz respectively. Also at 3.6 GHz with power consumption of 9.76 mW, the phase noise of -97.75 dBc/Hz at 1 MHz offset is resulted.