作　　者： ; ;

机构地区： 山东大学信息科学与工程学院

出　　处： 《山东大学学报（工学版）》 2004年第1期82-84,共3页

摘　　要： 提出的“基于带通滤波器的参差滤波实现高增益宽带有源滤波的方法”是利用多个带通滤波器将一个宽带的输入信号分成几个频段 ,将每一个频段的信号作为一个分信号 .然后 ,由对应每个分信号的相应支路对分信号进行加权处理 ,使之达到要求的带宽和增益 .最后 ,再将各个支路的信号合成为一个所需带宽和增益的信号输出 .该方法解决了要求高增益和宽频带时 ,单级有源滤波器进行级联无法解决的带宽与增益积的矛盾 ,而且 。 Introduces a method of active filter ing to get wide band an d high gain by staggered filtering based on band-pass filter. A wideband input is divided into several signals of different frequency band by many band-pass f ilters. Then, weighted handling of their corresponding subcircuists make these s ignals meet the requirements of bandwidth and gain. Finally, all the signals han dled are integrated into one for output meeting the requirements. This method solves the problem of conflict between wide frequency band an d high gain that cannot be solved by cascade connection of single-section active filter. Furthermore, signals can be modulated conveniently.

关 键 词： 带通滤波器 参差滤波 加权乘法器

领　　域： [电子电信] [电子电信]