DIGITAL DEMODULATOR FOR FREQUENCY-MODULATED SIGNALS

摘要

FIELD: radio engineering, communication.SUBSTANCE: digital demodulator for frequency-modulated signals relates to radio engineering and can be used in devices for receiving discrete and analogue information for digital demodulation of frequency-modulated or frequency-shift keyed signals. The digital demodulator for frequency-modulated signals includes two digital narrow-band signal detectors (DNBD), which operate concurrently but with different sampling frequencies fand fgenerated by clock generators thereof. Inputs of DNBD1 and DNBD2 are connected together to form the input of the frequency-modulated signal demodulator. The output of DNBD1 is connected to the non-inverting input of a subtractor, the inverting input of which is connected to the output of DNBD2. The output of the subtractor is the output of the digital demodulator for frequency-modulated signals.EFFECT: high-speed digital demodulation of frequency-modulated signals.3 dwg