DEVICES FOR DEMODULATION OF AMPLITUDE-MODULATED RADIO FREQUENCY SIGNALS Russian patent published in 2008 - IPC H03D1/18 

FIELD: radio communication.

SUBSTANCE: in device of demodulation of amplitude-manipulated and amplitude-modulated (AM) signals, which consists of quadripoles joined in cascade manner, non-linear element, low-pass filter, serially connected separating reservoir and low-frequency load, additionally as non-linear element three-pole non-linear element is selected, which is connected between quadripole and introduced high-frequency load according to the circuit with common emitter, with common base or common collector, low-pass filter is connected to the output of high-frequency load, quadripole is made of at least three resistive dipoles, values of parameters of which are selected based on condition of provision of preset values of demodulator transfer coefficients modules in two conditions of non-linear element that are determined with two extreme values of levels of input AM signal.

EFFECT: provision of preset values of demodulator transfer coefficients modules.

5 cl, 6 dwg