A novel 2.95–3.65 GHz CMOS LC-VCO using tuning curve compensation

被引：0

作者：

肖时茂 ^{[1
]}

马成炎 ^{[1
,2
]}

叶甜春 ^{[1
]}

机构：

[1] Institute of Microelectronics,Chinese Academy of Sciences

[2] Hangzhou Zhongke Microelectronics Co.Ltd

来源：

Journal of Semiconductors | 2009年 / 10期

基金：

国家高技术研究发展计划(863计划);

关键词：

CMOS; A-MOS; voltage-controlled oscillator; tuning curve compensation;

D O I：

暂无

中图分类号：

TN752 [振荡器];

学科分类号：

080904 ;

摘要：

This paper presents a new CMOS LC-VCO with a 2.95–3.65 GHz tuning range.The large tuning range is achieved by tuning curve compensation using a novel varactor configuration,which is mainly composed of four accumulation-mode MOS varactors(A-MOS)and two bias voltages.The proposed varactor has the advantages of optimizing quality factor and tuning range simultaneously,linearizing the effective capacitance and thus greatly reducing the amplitude-to-phase modulation(AM-PM)conversion.The circuit is validated by simulations and fab- ricated in a standard 0.18μm 1P6M CMOS process.Measured phase noise is lower than–91 dBc at 100 kHz offset from a 3.15 GHz carrier while measured tuning range is 21.5%as the control voltage varies from 0 to 1.8 V.The VCO including buffers consumes 2.8 mA current from a 1.8 V supply.

引用

页码：63 / 67

页数：5