FIELD: radio engineering; receiving devices.
SUBSTANCE: newly introduced in device that has amplifier and low-pass band filter are series-connected intermediate-frequency amplifier, splitter, and multiplying unit; second output of splitter is connected to second input of multiplying unit whose output is connected to input of low-pass band filter; output of the latter is connected to input of amplifier whose output functions as device output and input, as device input.
EFFECT: enhanced degree of noise suppression.
1 cl, 2 dwg
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