基于CMOS工艺宽带LC压控振荡器研究  

Study of a Wideband LC VCO Based on CMOS Technology

作　　者：程知群[1] 傅开红[1] 李进[1] 周云芳[1] 

机构地区：[1]杭州电子科技大学射频电路与系统教育部重点实验室,杭州310018

出　　处：《电子器件》2009年第4期742-745,共4页Chinese Journal of Electron Devices

基　　金：国家自然科学基金资助项目(60776052)

摘　　要：设计了一种应用于无线通信系统的宽带电感电容(LC)压控振荡器(VCO),电路采用开关电容阵列获得了宽频率覆盖范围;利用开关可变电容阵列减小了调谐增益变化;并通过采用高品质因数的差分电感和噪声滤波技术获得了低相位噪声。电路设计采用SMIC0.18μmCMOS工艺。仿真结果表明:在工作电压为1.8V时,直流功耗为9mW,压控振荡器的频率范围870～1500MHz(53%),调谐增益在67MHz/V至72MHz/V之间。相位噪声优于-100dBc/Hz@100kHz。A wideband LC voltage-control oscillator （VCO） is designed for the application of wireless communication system. The wide frequency range is achieved by using the switch capacitor array and the small gain fluctuation is completed by using the switch varactor array and the low phase noise performance is got after using the differential inductor with high quality factor and the filtering method in the circuit. The design of VCO circuit is implemented by using SMIC 0. 18μm CMOS process. Simulation results show the power consumption of 9 mW and the tuning range from 870 MHz to 1500 MHz （53%） and the tuning gain from 67 to 72 MHz/V with 1.8 V supply voltage. The phase noise is better than- 100 dBc/Hz @100 kHz.

关 键 词：CMOS 宽带压控振荡器 开关电容阵列 调谐增益 相位噪声 

分 类 号：TN4[电子电信—微电子学与固体电子学]