Abstract: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.