基于CFA的六阶巴特沃斯低通滤波器设计  

Design of six order Butterworth low-pass filter based on CFA

作　　者：董金宁 池思慧 刘宛 赵柏树 Dong Jinning;Chi Sihui;Liu Wan;Zhao Baishu(School of Computer Science and Information Engineering,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学计算机与信息工程学院,湖北武汉430062

出　　处：《电子技术（上海）》2018年第9期56-59,共4页Electronic Technology

摘　　要：选用一种典型的电流反馈型运算放大器进行研究,设计了一种六阶巴特沃斯低通滤波器。详细论述了电路设计原理、电路结构与元件参数选择方法。用Multisim对电路进行了仿真。仿真结果表明电路的通带增益为28d B,上限截止频率为10MHz,通带起伏为2d B。通带增益可独立于截止频率单独调节。A typical current-feedback operational amplifier has been chosen to research, and a six-order Butterworth low-pass filter has been designed.The principle of circuit design, the circuit-structure and the parameter selection method have been discussed in detail. The circuit has been simulated with Multisim.The simulation results show that the passband gain of the circuit is 28 d B, the upper cut-off frequency is 10 MHz, and the fluctuation in passband is 2 d B.The gain of the passband can be adjusted independently,which is not influenced by the cut-off frequency

关 键 词：电流模电路 CFA 巴特沃斯低通滤波器 运算电路 

分 类 号：TN713[电子电信—电路与系统]