一种高性能全差分双环路VCO的设计  

Design of a High Performance Fully Differential Dual-Loop VCO

作　　者：杨丽燕[1] 段吉海[1] 邓翔[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《微电子学》2012年第5期637-641,共5页Microelectronics

基　　金：国家自然科学基金资助项目(61161003;61166004)

摘　　要：设计了一种基于SMIC 0.18μm RF 1P6MCMOS工艺的高性能全差分环形压控振荡器(ring-VCO),采用双环连接方式,并运用交叉耦合正反馈来提高性能。在1.8V电源电压下对电路进行仿真,结果表明:1)中心频率为500MHz的环形VCO频率调谐范围为341～658MHz,增益最大值Kvco为-278.8MHz/V,谐振在500MHz下VCO的相位噪声为-104dBc/Hz@1MHz,功耗为22mW;2)中心频率为2.5GHz的环形VCO频率调谐范围为2.27～2.79GHz,增益最大值Kvco为-514.6MHz/V,谐振在2.5GHz下VCO的相位噪声为-98dBc/Hz@1MHz,功耗为32mW。该VCO适用于低压电路、高精度锁相环等。A high-performance fully differential ring voltage-controlled oscillator（ring-VCO） was designed based on SMIC＇s 0.18-μm RF 1P6M CMOS technology,in which a dual-loop and a cross coupling positive feedback were used to improve the performance.Post simulation was made on the circuit at 1.8 V supply power.Results showed that： 1） the ring VCO with a center frequency of 500 MHz had a frequency range from 341 MHz to 658 MHz,a peak gain（Kvco） of-278.8 MHz/V,a phase noise of-104 dBc/Hz at 1 MHz offset from 500 MHz oscillating frequency,and a power consumption of 22 mW;2） the ring VCO with a center frequency of 2.5 GHz had a frequency range from 2.27 GHz to 2.79 GHz,a peak gain（Kvco） of-514.6 MHz/V,a phase noise of-98dBc/Hz at 1 MHz offset from 2.5 GHz oscillating frequency,and a power consumption of 32 mW.The VCO is applicable for low voltage circuits and high-precision PLL.

关 键 词：环形压控振荡器 交叉正反馈 调谐范围 相位噪声 

分 类 号：TN453[电子电信—微电子学与固体电子学]