用于微波通信的2.4 GHz压控振荡器优化设计  

Optimization Design of 2.4 GHz VCO for Microwave Communication

作　　者：段文娟 刘博 王金婵 张金灿 刘敏 孟庆端 DUAN Wenjuan;LIU Bo;WANG Jinchan;ZHANG Jincan;LIU Min;MENG Qingduan(Electrical Engineering College, Henan University of Science and Technology, Luoyang 471023,China)

机构地区：[1]河南科技大学电气工程学院,河南洛阳471023

出　　处：《压电与声光》2020年第4期461-465,476,共6页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61704049,61804046);河南省科技厅科技计划基金资助项目(192102210087,182102210295)。

摘　　要：该文提出了一种频率为2.4 GHz的低功耗低相位噪声的改进型电容电感型压控振荡器(LC-VCO)。采用有源金属氧化物半导体(MOS)晶体管取代电阻和电容以优化电路结构,有效减小版图面积和功耗,同时抑制无源器件引起电路精度的恶化,提升VCO综合性能。基于TSMC 65 nm/1.8 V CMOS工艺进行电路设计和仿真,结合理论建模和小信号等效电路分析,调试关键MOS器件参数。结果表明,改进后的VCO的调谐范围从2.365~2.506 GHz,调谐带宽为141 MHz,-127.272 dBc/Hz@1 MHz的相位噪声,1.8 V电源电压下功耗低至1.323 mW,综合优值高达-193.84 dBc·Hz-1,优于多数同频段同类型的压控振荡器。An improved LC voltage-controlled oscillator(LC-VCO)with low power consumption and low phase noise at 2.4 GHz oscillation frequency is proposed in this paper.As an optimization scheme,the active MOS transistor devices are employed to replace the passive resistors and capacitors in order to reduce the layout area and power consumption,as well as improve the comprehensive performance of VCO.Based on TSMC 65 nm/1.8 V CMOS process,a VCO circuit is designed and simulations are performed for performance analysis.By combining theoretical modeling with small signal equivalence circuit,appropriate parameter tuning is realized for the replacement of key passive devices.The simulation results show that the improved VCO has a tuning range from 2.365 GHz to 2.506 GHz and the tuning bandwidth of 141 MHz,phase noise of-127.272 dBc/Hz@1 MHz,and as low as 1.323 mW power consumption at 1.8 V power supply voltage.Furthermore,the value of figure of metrics(FoM)is up to-193.84 dBc·Hz-1,which is better than most of other same LC-VCOs at the same frequency range.

关 键 词：电容电感型压控振荡器(LC-VCO) 低功耗 低相位噪声 LS频段 优化设计 

分 类 号：TN752.5[电子电信—电路与系统]