Anti-aliasing Filter Circuit Design for Active Power Filter

Based on practical demands, the anti-aliasing filter circuit in forward channel of active power filter was designed, adopting low-pass Butterworth filter as the prototype, and using Multiple-Feedback architecture. The implementation of actual circuit to meet the established specifications was represented. And how to calculate the circuit-component values required was focused on. To test the design results, simulation was performed using the software, Mutisim, afterwards. This circuit had been applied in practice and played a perfect anti-aliasing filtering part.