FIELD: radio engineering, communication.
SUBSTANCE: phase-modulated or frequency-modulated signal is transmitted to a demodulator which is made from a four-terminal element, a nonlinear element, an integrating circuit - low-pass filter, a separating capacitor and a low-frequency load; input signals are further amplitude-modulated by transmitting said signals to the left-side slope of the amplitude-frequency characteristic of the demodulator; the nonlinear element is used to decompose the spectrum of said signals; the low-frequency component is transmitted to the integrating circuit - low-pass filter; the low-pass filter is used to select the information low-frequency signal. The four-terminal element is complex and is made from reactive and resistive elements; the nonlinear element is connected in a longitudinal circuit and relationships between elements of the resistance matrix of the complex four-terminal element and frequency are selected in accordance with given mathematical expressions.
EFFECT: wider field of physical implementation.
2 cl, 4 dwg
