Title :
CMOS Quadrature VCO Implemented With Two First-Harmonic Injection-Locked Oscillators
Author :
Jang, Sheng-Lyang ; Huang, S.-S. ; Lee, Chien-Feng ; Juang, M.-H.
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei
Abstract :
This letter presents a new quadrature voltage-controlled oscillator (QVCO). The LC-tank QVCO consists of two first-harmonic injection-locked oscillators (ILOs). The outputs of one ILO are injected to the gates of the tail transistors on the other ILO and vice versa so as to force the two ILOs operate in quadrature. The proposed CMOS QVCO has been implemented with the TSMC 0.18 mum CMOS technology and the die area is 0.582 times 0.972 mm2. At the supply voltage of 1.0 V, the total power consumption is 8.0 mW. The free-running frequency of the QVCO is tunable from 5.31 GHz to 5.75 GHz as the tuning voltage is varied from 0.0 V to 1.0 V. The measured phase noise at 1 MHz offset is -120.01 dBc/Hz at the oscillation frequency of 5.31 GHz and the figure of merit (FOM) of the proposed QVCO is about -185.48 dBc/Hz.
Keywords :
CMOS integrated circuits; MMIC oscillators; field effect MMIC; harmonic oscillators (circuits); injection locked oscillators; integrated circuit design; integrated circuit noise; phase noise; voltage-controlled oscillators; CMOS quadrature VCO implementation; LC-tank QVCO; TSMC CMOS technology; complementary metal-oxide semiconductor; die area; figure of merit value; first-harmonic injection-locked oscillators; free-running frequency tuning; frequency 5.31 GHz to 5.75 GHz; measured phase noise; oscillation frequency; power 8.0 mW; quadrature voltage-controlled oscillator; size 0.18 mum; size 0.582 mm; size 0.972 mm; total power consumption; voltage 1 V; CMOS technology; Energy consumption; Frequency measurement; Injection-locked oscillators; Noise measurement; Phase measurement; Tail; Tuning; Voltage; Voltage-controlled oscillators; Complementary metal–oxide semiconductor (CMOS); first-harmonic injection locked oscillators; quadrature voltage-controlled oscillator-s (QVCO);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2008.2003476
