FIELD: electronic engineering. SUBSTANCE: method for recovering frequency-modulated signal having first component of frequency-modulated signal at spectral section of zero operating frequency and second component of frequency-modulated signal at spectral section of operating frequency which is in quadrature dependence of first component includes conversions involving frequency increase and summing up of first and second components to obtain reference signal, time delay of first and second components, conversion involving frequency increase and summing up of delayed first and second components converted with frequency increase to obtain delayed reference signal which is in quadrature dependence of reference signal, limiting of reference and delayed signals, and detection of limited delayed reference signal using delayed reference signal. Device implementing this method is described. EFFECT: improved validity of input audio signal reproduction. 8 cl, 4 dwg
