METHOD FOR FREQUENCY MODULATION AND DEMODULATION OF HIGH-FREQUENCY SIGNALS AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2013 - IPC H03J3/00 H03D3/00 

FIELD: radio engineering, communication.

SUBSTANCE: in order to realise said method, the apparatus for frequency modulation and demodulation of high-frequency signals has a reactive four-terminal linear element, a three-terminal nonlinear element, a low-frequency control signal source, a low-pass filter, a high-frequency signal source, a high-frequency load, a separation capacitor and a low-frequency load, wherein the reactive four-terminal linear element is in form of an overlapped T-shaped connection of four reactive two-terminal elements, parameters of which 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