FIELD: radio engineering. SUBSTANCE: proposed device includes input unit, intermediate frequency amplifier, amplitude limiter, frequency discriminator, multiplier and lowpass filter connected in series. Quadrature amplitude detector and second low-pass filter connected in series are placed between output of intermediate frequency amplifier and second input of multiplier. EFFECT: enhanced noise immunity of reception of frequency modulated signals with low signal-to-noise ratio across input. 6 dwg
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