Title :
Wide-Band Low-Noise Quadrature VCO Design
Author :
Yan, Yong-Hong ; Xie, Yan ; Peng, Wei ; Zeng, Yun
Author_Institution :
Coll. of Phys. & micro-Electron. Sci., Hunan Univ., Changsha
Abstract :
A 2.9 GHz quadrature VCO designed in a 0.18 um CMOS process achieves a very wide tuning range of 77% when the supply voltage equals 1.8 V. The phase noise is -120 dB/Hz at 1MHz offset for the oscillation frequency of 2 GHz, and -104 dB/Hz at 1MHz offset for the oscillation frequency of 4 GHz. The coupled oscillator architecture is adopted to widen tuning range and to minimum phase noise. Accurate quadrature outputs are maintained throughout the entire frequency range, as needed in all modern transceiver architectures.
Keywords :
CMOS integrated circuits; UHF oscillators; circuit tuning; integrated circuit design; integrated circuit noise; microwave oscillators; phase noise; voltage-controlled oscillators; CMOS process; coupled oscillator architecture; frequency 2.9 GHz; frequency 4 GHz; minimum phase noise; phase noise; transceiver architectures; voltage 1.8 V; wideband low-noise quadrature VCO design; Circuit optimization; Coupling circuits; Frequency; Phase noise; Transceivers; Tuning; Virtual colonoscopy; Voltage; Voltage-controlled oscillators; Wideband; CMOS; Quadrature; VCO; Wide-band;
Conference_Titel :
Intelligent Information Hiding and Multimedia Signal Processing, 2008. IIHMSP '08 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-0-7695-3278-3
DOI :
10.1109/IIH-MSP.2008.116
