Computer simulation of the transmission of modulated signals through linear analog circuits using fast Fourier transforms

An algorithm is proposed for computing transformations of modulated signals in linear circuits by the spectrum method and by applying fast Fourier transforms. The algorithm computes transformations of oscillations with complex modulation and large angle modulation indexes in analog circuits. The accuracy of the proposed method is discussed. A program is described for analyzing modulated oscillations in linear selective circuits that complements the known electronic circuit simulation programs.