A 3GHz Low-Power and Low-Phase-Noise LC VCO with a Self-Biasing Current Source  

3GHz低功耗低相位噪声的带自偏置电流源的LC压控振荡器(英文)

作　　者：陈普锋[1] 李志强[1] 黄水龙[1] 张海英[1] 叶甜春[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《Journal of Semiconductors》2008年第11期2106-2109,共4页半导体学报（英文版）

基　　金：the National Natural Science Foundation of China(No.60276021);the State Key Development Program for Basic Research of China(No.G2002CB311901)~~

摘　　要：A fully integrated 3GHz low-power and low-phase-noise voltage-controlled oscillator （VCO） with a self-biasing current source was implemented in a standard 0.18μm CMOS process. A trade-off between noise and power was realized through the optimization of the improved current source. The VCO can be tuned from 2.83 to 3.25GHz with a 13.8% tuning range. The measured phase noise at 1MHz offset is -111dBc/Hz at a frequency of 3.22GHz while the core circuit draws less than 2mA from a 1.8V supply voltage. These results make the circuit suitable for a 5GHz wireless local area network （WLAN） receiver and 3.4 to 3.6GHz world interoperability for microwave access （WiMAX） application.利用0.18μm CMOS工艺实现了一个全集成的工作于3GHz的低功耗、低相位噪声的压控振荡器,且带有自偏置电流源.通过对改进的电流源进行优化,在噪声与功耗之间达到了折中.该压控振荡器可工作于2.83至3.25GHz频段内,调谐范围达到13.8%.当工作于3.22GHz时,测得的相位噪声在1MHz频偏处为-111dBc/Hz.在1.8V电源电压下,核心模块消耗电流小于2mA.表明该电路适合5GHz的无线局域网接收机以及3.4至3.6GHz的全球微波互联接入(WiMAX)应用.

关 键 词：3GHz LC VCO phase noise self-biasing current source CMOS 

分 类 号：TN752[电子电信—电路与系统]