参数可线性重构的电流模式二阶带通滤波器  

A Current-mode Second-order Bandpass Filter with Linear Reconfigurable Parameters

作　　者：宋树祥[1] 王小华[1] 解鸿国[1] 

机构地区：[1]广西师范大学电子工程学院,广西桂林541004

出　　处：《电讯技术》2012年第6期974-978,共5页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61061006)~~

摘　　要：针对二阶通用带通滤波器存在特征参数不能线性重构的缺点,提出一种全新的特征参数可线性重构的电流模式二阶带通滤波器设计理论。该调谐滤波器通过调节反馈电流放大器的放大系数可线性重构二阶带通滤波器的截止频率、品质因素等参数,而滤波器的幅频特性保持不变。Spectre仿真结果表明,±1.5 V电源电压下,滤波器的中心频率和品质因素在2GHz内可线性重构。In view of the shortcoming that the filter characteristic parameters of the second - order universal bandpass filters can not be linearly modified, a novel design theory for the second - order current - mode band- pass filter with linear reconfigurable characteristic parmneters is presented. The parameters of＇ the filter such as cut - off frequency and Q -factor can be linearly reconfigured by adjusting the value of the gain of the current feedback amplifiers, without any change of the filter amplitude- frequency characteristics. Spectre simulation results confirm that the filter cut - off frequency and Q - factor can be linearly reconstructed in 2 GHz with ＋ 1.5 V power supply voltage.

关 键 词：带通滤波器 线性可重构 电流控制的电流传输器 电流放大器 

分 类 号：TN713[电子电信—电路与系统]