A 3.01–3.82 GHz CMOS LC voltage-controlled oscillator with 6.29% VCO-gain variation for WLAN applications  

作　　者：刘小龙 张雷 张莉 王燕 余志平 

机构地区：[1]Institute of Microelectronics,Tsinghua University

出　　处：《Journal of Semiconductors》2014年第7期125-131,共7页半导体学报（英文版）

基　　金：supported by the State Key Development Program for Basic Research of China(No.2010CB327404);the National High Technology Research and Development Program of China(No.2011AA010202);the National Science and Technology Major Project of China(No.2012ZX03004004);the National Natural Science Foundation of China(Nos.61176034,61101001,61204026);the Tsinghua University Initiative Scientific Research Program

摘　　要：A wideband low-phase-noise LC voltage-controlled oscillator （VCO） with low VCO gain （Kvco） vari- ation for WLAN fractional-N frequency synthesizer application is proposed and designed on a 0.13-μm CMOS process. In order to achieve a low Kvco variation, an extra switched varactor array was added to the LC tank with the conventional switched capacitor array. Based on the proposed switched varactor array compensation technique, the measured Kvco is 43 MHz/V with only 6.29% variation across the entire tuning range. The proposed VCO provides a tuning range of 23.7% from 3.01 to 3.82 GHz, while consuming 9 mA of quiescent current from a 2.3 V supply. The VCO shows a low phase noise of-121.94 dBc/Hz at 1 MHz offset, from the 3.6 GHz carrier.A wideband low-phase-noise LC voltage-controlled oscillator （VCO） with low VCO gain （Kvco） vari- ation for WLAN fractional-N frequency synthesizer application is proposed and designed on a 0.13-μm CMOS process. In order to achieve a low Kvco variation, an extra switched varactor array was added to the LC tank with the conventional switched capacitor array. Based on the proposed switched varactor array compensation technique, the measured Kvco is 43 MHz/V with only 6.29% variation across the entire tuning range. The proposed VCO provides a tuning range of 23.7% from 3.01 to 3.82 GHz, while consuming 9 mA of quiescent current from a 2.3 V supply. The VCO shows a low phase noise of-121.94 dBc/Hz at 1 MHz offset, from the 3.6 GHz carrier.

关 键 词：LC VCO VCO gain （Kvco） low Kvco variation tuning range phase noise CMOS 

分 类 号：TN752[电子电信—电路与系统] TN929.11