基于开关电流技术的切比雪夫滤波电路的实现  

Anslog Implementation of Chebyshev Filter Based on Switched-current Circuit

作　　者：李琳[1] 

机构地区：[1]武夷学院,福建省武夷山市354300

出　　处：《电子工程师》2008年第9期14-16,共3页Electronic Engineer

基　　金：武夷学院青年学术研究支持计划(XQL05011)

摘　　要：提出了一种运用开关电流技术实现切比雪夫低通滤波电路的方法。将双二次滤波器的传递函数由s域进行双线性z变换,确立了基于开关电流积分器的双二次节电路,利用这种双二次节可以实现开关电流滤波器。文中采用双二次低通滤波器级联实现了六阶切比雪夫低通滤波器的设计与仿真,仿真结果表明切比雪夫低通滤波器的陡峭衰减特性和理想幅频特性符合设计要求,从而证实了该方法的可行性和正确性。A method realizing Chebyshev low - pass filtering electric circuit is proposed. It uses switched electric current technology to perform the bilinear z transformation of the biquadratic filter transfer function in s domain. A biquadratic node electric circuit, based on switched electric current integrator is established. This kind of biquadratic node is used to realize the switched electric current filter. This paper uses a biquadratic low pass filter cascaded to realize six-order Chebyshev low pass filter design and simulation. The simulation result indicated that the Chebyshev low pass filter steep attenuation and ideal amplitude-frequency characteristic met the design requirements, thus confirmed this method＇s feasibility and accuracy.

关 键 词：双二次滤波器 开关电流电路 切比雪夫滤波器 频率翘曲效应 仿真 

分 类 号：TN713.4[电子电信—电路与系统]