Design and realization of an ultra-low-power low-phase-noise CMOS LC-VCO  

作　　者：吴秀山 王志功 李智群 夏峻 李青 

机构地区：[1]College of Electrical & Mechanical Engineering,China Jiliang University [2]Institute of RF-& OE-ICs,Southeast University [3]Key Laboratory of ASIC Design of Jiangsu Province,Nantong University

出　　处：《Journal of Semiconductors》2010年第8期137-140,共4页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.60772008);the Education Government of Zhejiang Province,China(No.Y200805918).

摘　　要：A fully integrated cross-coupled LC tank voltage-controlled oscillator（LC-VCO） using transformer feedback is proposed to achieve a low phase noise and ultra-low-power design even at a supply below the threshold voltage. The ultra-low-power VCO is implemented in the mixed-signal and RF 1P6M 0.18-μm CMOS technology of SMIC. The measured phase noise is-125.3 dBc/Hz at an offset frequency of 1 MHz from a carrier of 2.433 GHz,while the VCO core circuit draws only 640μW from a 0.4-V supply.The designed VCO can cover a frequency range from 2.28 to 2.48 GHz.The tuning range of the circuit is 200 MHz（8.7%） and the FOM is-195.7 dB,which is suitable for an IEEE 802.11b receiver.A fully integrated cross-coupled LC tank voltage-controlled oscillator（LC-VCO） using transformer feedback is proposed to achieve a low phase noise and ultra-low-power design even at a supply below the threshold voltage. The ultra-low-power VCO is implemented in the mixed-signal and RF 1P6M 0.18-μm CMOS technology of SMIC. The measured phase noise is-125.3 dBc/Hz at an offset frequency of 1 MHz from a carrier of 2.433 GHz,while the VCO core circuit draws only 640μW from a 0.4-V supply.The designed VCO can cover a frequency range from 2.28 to 2.48 GHz.The tuning range of the circuit is 200 MHz（8.7%） and the FOM is-195.7 dB,which is suitable for an IEEE 802.11b receiver.

关 键 词：low phase noise low-power transformer voltage-controlled oscillator FEEDBACK 

分 类 号：TN752[电子电信—电路与系统]