Title :
Low phase noise and linear gain VCO using self-switched biasing
Author :
Chen, Nan ; Huang, Lu ; Wang, Chenluan ; Yan, Yuepeng ; Lin, Fujiang
Author_Institution :
Dept. 23, Univ. of Sci. & Technol. of China (USTC), Hefei, China
fDate :
Nov. 30 2011-Dec. 2 2011
Abstract :
A low power and low phase noise LC-tank VCO with linear gain for 2.4 GHz ISM band is presented. Self-switched biasing technology is adopted to reduce flicker noise. Low power consumption is achieved by reducing supply voltage for the character of this structure. To extend the linear range of VCO gain (Kvco) in low supply voltage condition, distributed varactor biasing is used. The proposed VCO is implemented in 0.18μm CMOS process. The measured phase noise is -122.9 dBc/Hz at 1MHz offset from 2.5 GHz oscillation frequency, while consuming 2.6 mA current with 1.2 V supply voltage, and the FOM is 186 dBc/Hz.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; voltage-controlled oscillators; CMOS process; FOM; band; current 2.6 mA; flicker noise reduction; frequency 2.4 GHz; frequency 2.5 GHz; linear gain VCO; low phase noise LC-tank VCO; power consumption; self-switched biasing technology; size 0.18 mum; supply voltage reduction; voltage 1.2 V; 1f noise; Phase noise; Transistors; Varactors; Voltage control; Voltage-controlled oscillators; CMOS; VCO gain (Kvco); phase noise; switched biasing; voltage controlled oscillator (VCO);
Conference_Titel :
Radio-Frequency Integration Technology (RFIT), 2011 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-0517-5
DOI :
10.1109/RFIT.2011.6141786
