DEVICE FOR DETECTION OF SIGNALS WITH FREQUENCY-SHIFT KEYING

摘要

FIELD: radio engineering, applicable in receiving devices of frequency-shift keying. SUBSTANCE: the device uses series-connected intermediate- frequency filter 1, limiter 2 whose output is connected via two branches, each having channel filter 3 and amplitude detector 4 with two inputs of subtracter 5. The output of subtracter 5 via low-pass filter 6 is connected to the input of first threshold unit 7. The output of the first threshold unit is connected to solver 12, whose second input is connected to the output of second threshold unit 11. The output of intermediate-frequency filter 1 is also connected to amplifier 13, whose output via third amplitude detector 8 is connected to band-pass filter 9. The output of band-pass filter 9 via fourth amplitude detector 10 is connected to the input of second threshold unit 11. EFFECT: improved design.