一种LC型CMOS射频带通滤波器及其自动调谐  

A RF CMOS LC Bandpass Filter with Automatic Tuning

作　　者：林之恒[1] 侯政雄[1] 田秋霜[1] 张永来[1] 高志强[1] 

机构地区：[1]哈尔滨工业大学微电子科学与技术系,哈尔滨150001

出　　处：《电子器件》2010年第6期691-695,共5页Chinese Journal of Electron Devices

摘　　要：介绍了一种二阶可调谐CMOSLC型射频带通滤波器及与其匹配的压控振荡器设计。品质因数很高而且可以通过负电导发生电路调谐。目标频率由一组分立的亚波段组成,通过电容阵列来控制。仿真结果表明,滤波器采用TSMC0.18μmCMOS工艺,工作电压3.3V,中心频率调谐范围为2.05Hz至2.38GHz。文中简单介绍了锁相环自动调谐系统。为了与滤波器进行匹配,振荡器是基于滤波器的原型设计的,仿真结果表明它们匹配良好。The paper presents a second order tunable RF CMOS LC bandpass filter with matched VCO.The quality factor is very high and can be tuned through an adjustable negative conductance generator circuit.The desired frequency tuning is accomplished by discrete tuning curve among a group of frequency sub-bands through capacitor array.The simulated results show the center frequency of the filter using TSMC 0.18 μm CMOS process can be operated from 2.05 GHz to 2.38 GHz under 3.3 V supply.The automatic tuning system in a PLL technique is simply introduced.To match the filter,the oscillator designed is based on the archetype of the filter and the simulation presents that they are in a good match.

关 键 词：LC带通滤波器 Q增强 自动调谐 振荡器 

分 类 号：TN713[电子电信—电路与系统]