【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。更多还原

【Abstract】 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.更多还原