FIELD: radio engineering, communication.
SUBSTANCE: apparatus for frequency modulation and demodulation of high-frequency signals has a reactive four-terminal linear element, a two-electrode nonlinear element in form of an active nonlinear element with negative differential resistance, a low-frequency control signal source, a low-pass filter, a high-frequency signal source, a high-frequency load and a low-frequency load, wherein the reactive four-terminal linear element is in form of a T-shaped connection of reactive two-terminal elements whose parameters are selected from conditions of given relationships.
EFFECT: providing an operation for generating a frequency-modulated signal with a variable frequency according to the law of variation of the amplitude of the low-frequency control signal and operations for demodulating and filtering frequency-modulated signals with amplitude gain by converting the frequency-modulated signal to an amplitude-frequency-modulated signal using the high-frequency part of the demodulator with given slope ratio of the amplitude-frequency curve using one device.
2 cl, 4 dwg
