一种新型低功耗C类压控振荡器设计  

A novel design of the low power Class-C VCO

作　　者：赵阳 袁圣越[1] 赵辰[1,2] 田彤 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海201801 [2]中国科学院大学电子电气与通信工程学院,北京100049

出　　处：《电子设计工程》2018年第2期173-176,180,共5页Electronic Design Engineering

摘　　要：基于UMC 65 nm CMOS工艺,设计一种应用于物联网系统射频前端的新型C类超低功耗压控振荡器(Voltage Controlled Oscillator,VCO),VCO起振后通过动态偏置环路将其锁定在C类状态。动态偏置环路包含幅度检测器、锁存器、反相器和偏置控制器等模块,动态偏置环路自动改变偏置电压并关闭动态偏置环路,将VCO从初始的AB类锁定在C类稳定工作。通过后仿真验证,在0.6 V电压供电下,功耗低至0.5 m W;中心频率为2.4 GHz时,在频偏100 k Hz和1 m Hz处的相位噪声分别为-96.1 d Bc/Hz和-115 d Bc/Hz;VCO输出频率的调谐范围为2.33~2.49 GHz,且线性度较高,FOM达到-186。Based on UMC 65 nm technology,a new-typed Class-C voltage-controlled oscillator(VCO)is designed for the RF front end of Inter of Things(IOT)system. VCO is locked in the Class-C state by a dynamic bias control loop after startup. The dynamic bias control loop consists of a detector,a latch,several inventors and a bias control circuit. The dynamic bias control loop changes the bias voltage itself so that VCO reins in Class-C state from Class-AB,then close the dynamic bias control loop. The simulation results show that the power consumption is only 0.5 m W at a 0.6 V supply. At 2.4 GHz,the phase noise is-96.1 d Bc/Hz at 100 KHz offset,-115 d Bc/Hz at 1 MHz offset,the tuning range is from2.33 GHz to 2.49 GHz and has a high linearity,to yield a Figure-of-Merit(FOM)of-186.

关 键 词：压控振荡器 低功耗 动态偏置控制 C类 物联网 

分 类 号：TN432[电子电信—微电子学与固体电子学]