METHOD FOR DEMODULATION OF AMPLITUDE-MODULATED RADIO FREQUENCY SIGNALS AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC H03D1/12 

FIELD: radio engineering.

SUBSTANCE: invention is related to the field of radio communication and may be used for demodulation (DM) of amplitude-manipulated, and also amplitude-modulated (AM) signals. In method and device for demodulation, AM signal is sent to DM made of quadripole (QP), dipole non-linear element (NE), low pass filter (LPF), serially connected sectional capacitance and low frequency (LF) load, which performs operations of AM signal spectrum decomposition into high frequency (HF) and LF components, elimination of constant component and separation of LF component. Between output of QP and LPF, a high frequency (HF) load is introduced into DM. NE is connected between source of signal and input of QP into longitudinal circuit. QP is made of number of reactive dipoles, at least two, parametre values of QP are selected from condition of provision of specified AM depth for received AM signal on HF load.

EFFECT: provision of specified AM depth of AM signal, which increases noise immunity.

2 cl, 3 dwg