FIELD: radio engineering, in particular, radio-receiving devices.
SUBSTANCE: device has speech signal source 1, device 3 for forming one-band signal, amplitude limiters-amplifiers 6,9, differentiating circuits 8,11, two-semi-period rectifiers 10,13 with active load, single-vibrators 12,15, adders 14,17, frequency doubler 2, signals multiplier unit 5, side frequency band filter 7, and subtracter unit 16, bearing frequency generator 4 of forming device 3; output of subtracting unit 16 is output of selector of frequency component of speech signal. Frequency component of speech component is selected by linear pulse-frequency detector from one side band of frequencies of amplitude-modulated oscillation, formed by given speech signal. By means of another similar additional detector, permanent component is excluded, which is subtracted from output signal of first detector.
EFFECT: increased sensitivity and precision of selection of frequency component of speech signal.
3 dwg
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