任意电流模式滤波器的综合实现  

Synthesis of arbitrary current mode filter

作　　者：李志军[1] 王春华[2] 刘荣[1] 

机构地区：[1]湘潭大学信息工程学院,湖南湘潭411105 [2]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《通信学报》2010年第8期60-65,74,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60676021);湖南省教育厅资助项目(07C761)~~

摘　　要：通过对一个任意电流模式滤波器传递函数进行一连串的数学变换,使其分解为n个无损积分器和n个电流比例器,从而提出了一种适合于任意电流模式滤波器的新的分析综合设计法,并以MCCII为有源器件实现了具体的电路模型。提出的模型具有如下优点:1)可以实现任意阶(n≥2)、任意类型的电流模式滤波器;2)实现的电路结构简单,仅由(2n+1)个有源器件、(2n+1)个电阻和n个电容构成;3)所有器件均接地,便于集成;4)在实现巴特沃斯滤波器时,通过对输出信号进行不同组合可以实现高通、低通、带通、带阻及全通滤波功能。以三阶椭圆滤波器和六阶巴特沃斯滤波器的设计为例验证了该模型的正确性。A new general analytical synthesis method for arbitrary current mode filter was presented.The method was based on the analytical decomposition of a complicated high-order transfer function into n lossless integrators and n cur-rent proportional blocks by a succession of innovative algebra process.The filter structure based on MCCIIs was pro-posed with the following advantages： 1） it can be used not only for arbitrary-order filters,but also for different filter types such as Butterworth,Chebyshev and Elliptic;2） the circuit structure proposed only contains（2n＋1） active elements,（2n＋1） resistors and n capacitors;3） all the elements are grounded,so it is convenient to be integrated;4） the different filter functions such as high-pass,low-pass,band-pass,band-reject and all-pass can be obtained when it act as a Butter-worth filter.A third-order elliptic low-pass filter and a sixth-order Butterworth universal filter were employed to demon-strate the realization scheme.The validity of the proposed structure was verified through PSPICE simulations.

关 键 词：电流模式滤波器 多输出端电流传输器 传输函数 分析综合设计法 

分 类 号：TN713[电子电信—电路与系统]