A 5 GHz CMOS frequency synthesizer with novel phase-switching prescaler and high-Q LC-VCO  

作　　者：曹圣国 杨玉庆 谈熙 闫娜 闵昊 

机构地区：[1]State Key Laboratory of ASIC & System,Fudan University

出　　处：《Journal of Semiconductors》2011年第8期98-103,共6页半导体学报（英文版）

基　　金：Project supported by the Important National Science & Technology Specific Projects of China(Nos.2009ZX01031-003-002, 2010ZX03001-004);the National High Technology Research & Development Program of China(No.2009AA011605)

摘　　要：A phase-locked loop（PLL） frequency synthesizer with a novel phase-switching prescaler and a high-Q LC voltage controlled oscillator（VCO） is presented.The phase-switching prescaler with a novel modulus control mechanism is much more robust on process variations.The Q factor of the inductor,I-MOS capacitors and varactors in the VCO are optimized.The proposed frequency synthesizer was fabricated by SMIC 0.13μm 1P8M MMRF CMOS technology with a chip area of 1150×2500μm^2.When locking at 5 GHz,the current consumption is 15 mA from a supply voltage of 1.2 V and the measured phase noise at a 1 MHz offset is -122.45 dBc/Hz.A phase-locked loop（PLL） frequency synthesizer with a novel phase-switching prescaler and a high-Q LC voltage controlled oscillator（VCO） is presented.The phase-switching prescaler with a novel modulus control mechanism is much more robust on process variations.The Q factor of the inductor,I-MOS capacitors and varactors in the VCO are optimized.The proposed frequency synthesizer was fabricated by SMIC 0.13μm 1P8M MMRF CMOS technology with a chip area of 1150×2500μm^2.When locking at 5 GHz,the current consumption is 15 mA from a supply voltage of 1.2 V and the measured phase noise at a 1 MHz offset is -122.45 dBc/Hz.

关 键 词：PLL frequency synthesizer differential voltage controlled oscillator phase-switching prescaler CMOS 

分 类 号：TN74[电子电信—电路与系统]