| 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=Aand during a time for B?A, D=0, for B=Aand during a time for B?A, where Aand Aare 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 Aand A, a flip-flop, inverters, AND and OR elements.EFFECT: faster operation and higher noise immunity.2 cl, 1 dwg |
