FIELD: signal processing ; digital processor units. SUBSTANCE: device has first integrator of first pole frequency, second integrator of second pole frequency, adder, phase modulator connected to adder to receive integrated and multiplexed adder signal and to generate frequency-modulated signal. Method for multiplexing group of input signals depends on adding and integrating signals for generating frequency-modulated signal; groups of input signals incorporating low-frequency data signals and voice signals are integrated. EFFECT: provision for dispensing with large DC decoupling capacitor. 6 cl, 7 dwg
