基于CFA的六阶切比雪夫有源低通滤波器设计与仿真

结合工程应用中对滤波器的需求，对基于CFA的有源低通滤波器的设计方法进行研究。选用一种典型的电流反馈型运算放大器,在对VCVS滤波电路传递函数分析的基础上,设计了基于CFA的六阶切比雪夫有源低通滤波器，并阐述了根据滤波器性能参数及截止频率确定电路参数的方法。软件仿真结果表明，该有源低通滤波器截止频率约为15 MHz，通带增益为39.796 dB，通带起伏为3.18 dB，过渡带衰减速率为-47.992 dB/倍频，滤波器性能指标与理论一致。该数据表明设计方法有效可行，可为其他有源滤波器的设计提供参考价值。

Design and simulation of six-order Chebyshev active low-pass filter based on CFA

Combined with the requirement of filter in engineering application, the design method of active low-pass filter based on CFA has been research. A typical current feedback operational amplifier has been selected. On the basis of the analysis of the transfer function of the VCVS filter circuit, a six-order Chebyshev active low-pass filter based on CFA has been designed. The circuit parameters have been determined according to the filter performance parameters and cut-off frequency. The software simulation results show that the cut-off frequency of the circuit is about 15 MHz, the pass band gain is 39.796 dB, the pass band fluctuation is 3.18 dB, the attenuation rate of the transition zone is -47.992 dB/frequency doubling, and the performance index of the filter is consistent with the theory. The datas indicate that the design method is effective and feasible, and can provide reference value for design of other active power filter.