METHOD FOR DIGITAL FILTERING DISCRETE SIGNAL AND DIGITAL FILTER THEREFOR

摘要

FIELD: radio engineering, communication.;SUBSTANCE: digital filtering method is based on generating a discrete signal P, which assumes values 0 or 1; generating a digital signal B by summing pulses of a given period for the value of the discrete signal P=1 and by subtracting the same pulses for the value of the discrete signal P=0, and generating an output signal D in the form D=1, for B=A₁ and during a time for B≠A₂, D=0, for B=A₂ and during a time for B≠A₁, where A₁ and A₂ are given values, which are determined by the maximum possible interval in which the state of the input signal is unambiguously undefined and which limit the variation interval of the digital signal B. The digital filter comprises a generator, a bidirectional counter, two digital comparators, a limiting signal setter for A₁ and A₂, a flip-flop, inverters, AND and OR elements.;EFFECT: faster operation and higher noise immunity.;2 cl, 1 dwg