1.8GHz宽带低相位噪声CMOS压控振荡器设计  

Design of a 1.8GHz Wide-Band,Low-Phase-Noise CMOS VCO

作　　者：曾健平[1] 章兢[1] 谢海情[1] 刘利辉[1] 曾云[1] 

机构地区：[1]湖南大学物理与微电子科学学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2007年第6期37-40,共4页Journal of Hunan University:Natural Sciences

基　　金：湖南省自然科学基金资助项目(05JJ30115)

摘　　要：采用一种基于开关电容阵列（SCA）和尾电流源处加入电感电容滤波相结合的电路结构，设计了一个1．8GHz宽带分段线性压控振荡器．采用TSMC0．18μm 1P6M CMOS RF工艺，利用Cadence SpectreRF完成对电路进行的仿真．结果显示，在电源电压Vnn=1．8V时，控制电压范围为0．6～1．8V，频率的变化范围为1．43～2．13GHz，达到39％，相位噪声为一131dBc／Hz@1MHz，功耗为9．36mW（1．8V×5．2mn）．很好地解决了相位噪声与调谐范围之间的矛盾．In order to solve the contradiction between phase noise and tuning range, a 1.8GHz piecewise linear VCO was designed based on the structure of combination of switching-capacitance array and LC noise filter added in the tail current source. The circuit was designed in TSMC 0.18 μm 1P6M CMOS RF process, and simulated by the SpectreRF in Cadence under supply voltage of 1.8 V. The output frequency ranged from 1. 430 GHz to 2. 134 GHz, and the tuning range was up to 39%. The phase noise was - 131dBc/Hz at an offset of 1 MHz. The power consumption of the circuit was 9.36 mW（1.8 V × 5.2 mA）.

关 键 词：压控振荡器 开关电容阵列 电感电容滤波 相位噪声 

分 类 号：TN911.8[电子电信—通信与信息系统]