2010•Journal of Circuits and SystemsRequires access

Novel systematic design of voltage-mode Nth-order CFA low-pass filter

Yigang He

Abstract

A systematic design method for nth-order voltage-mode multiple-loop feedback (MF) low-pass filter based on CFA is presented. The systematic design formula derivation is performed firstly. The nth-order low-pass filters with different structure are obtained by this method, which include n CFAs, n capacitors and n resistances. As an example, a new third-order Butterworth low-pass filter is designed by the systematic design method and simulated in PSPICE. The simulation results show that our systematic design method is feasible.

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Key concepts: Low-pass filter, Butterworth filter, Filter (signal processing), Control theory (sociology), Chebyshev filter, Capacitor, Electronic engineering, Filter design