FIELD: radio engineering, communication.
SUBSTANCE: method of demodulating and filtering phase-modulated signals is characterised by that a phase-modulated signal is transmitted to a demodulator having a four-terminal network, a two-terminal nonlinear element, a high-frequency load, the four-terminal network being made from an inverted L-shaped connection of two two-terminal networks, each formed from two parallel oscillatory circuits, a low-pass filter and a low-frequency load, wherein the phase-modulated signal is converted to an amplitude-phase-modulated signal by transmitting said signal to the right or left side slope of the amplitude-frequency curve of the high-frequency part of the demodulator in a given frequency band; values of parameters of elements of the four-terminal network are determined using mathematical expressions given in the claim.
EFFECT: enabling demodulation and filtration without using a reference oscillation generator with conversion of the phase-modulated signal to an amplitude-phase-modulated signal using the high-frequency part of the demodulator with a given quasi-linear slope and shape of the amplitude-frequency curve to increase noise-immunity.
2 cl, 4 dwg
