FIELD: analog- to-digital and digital-to-analog converters of telephone and commutation networks, radio telephone systems using pulse-code modulation. SUBSTANCE: one claim of invention discloses device design, which has step sign detection unit, integration units, comparison unit, syllable filtration unit, decimation filtration unit. Another claim of invention discloses device design which has comparator, capacitor, reference voltage source, current source with pulse-width modulator. One claim of invention discloses design of device for converting multiple binary-encoded digital samples of signal into analog signal comprising comparison unit, interpolation unit, digital integrator, syllable filtration unit, analog integrator, analog signal filtration unit. Method for converting analog signal into digital representation involves comparison of analog signal to integrated signal and calculation of sign and step value for generation of digital signal. Method for converting multiple binary- coded digital signal samples into analog signal involves comparison of interpolated samples to digital integrator values in order to calculate step sign, calculation of step value, generation of analog signal and its filtration. This design results in possibility produce complete digital value in the course of decimation. EFFECT: improved quality of voice transmission. 32 cl, 11 dwg, 2 tbl
