Title :
A 1-V 17-GHz 5-mW CMOS Quadrature VCO Based on Transformer Coupling
Author :
Ng, Alan W L ; Luong, Howard C.
Author_Institution :
Hong Kong Univ. of Sci. & Technol., Hong Kong
Abstract :
A 1-V 17-GHz 5-mW quadrature voltage-controlled oscillator (QVCO) based on transformer coupling is presented. Transformer coupling between two LC tank oscillators is proposed to achieve quadrature outputs with improved performance in terms of high frequency, wide tuning range, low phase noise, and low power as compared to existing active-coupling QVCOs. Implemented in a 0.18-mum CMOS process, the proposed QVCO measures a frequency tuning range of 16.5% at 17 GHz and phase noise of -110 dBc/Hz at 1 MHz offset while consuming 5 mA from a 1-V power supply and occupying a core area of 0.37 mm2.
Keywords :
CMOS integrated circuits; MMIC oscillators; voltage-controlled oscillators; CMOS process; CMOS quadrature VCO; LC tank oscillators; current 5 mA; frequency 17 GHz; frequency tuning; phase noise; power 5 mW; quadrature voltage-controlled oscillator; size 0.18 mum; transformer coupling; voltage 1 V; Area measurement; CMOS process; Frequency measurement; Noise measurement; Phase measurement; Phase noise; Power measurement; Power supplies; Tuning; Voltage-controlled oscillators; Low voltage; PLL; QVCO; RF CMOS; VCO; oscillator; quadrature; sideband rejection; synthesizer; transformer;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2007.903057
