FIELD: radio engineering, communication.
SUBSTANCE: method of demodulating and filtering phase-modulated signals consists in that a demodulator is connected between a source of phase-modulated signals and a low-frequency load and is made from a four-terminal element, a nonlinear element, a high-frequency load, a low-pass filter and a separating capacitor, wherein a phase-modulated signal is converted to an amplitude-phase-modulated signal by feeding it to the right-side or left-side slope of the amplitude-frequency curve, the low-pass filter is used to select the information-bearing low-frequency signal, which is transmitted to a low-frequency selective load in form of a differentiating or integrating circuit, respectively. The apparatus has a source of phase-modulated signals, a four-terminal element, a nonlinear element, a high-frequency load, a low-pass filter and a low-frequency load.
EFFECT: simultaneously providing demodulation and filtration of phase-modulated signals without using a reference oscillator.
2 cl, 4 dwg
