FIELD: computer engineering and automatic control. SUBSTANCE: device of each alternative has level distributor, square-pulse generators, flip-flop, and voltage increment separating units; device of first alternative has its voltage increment separating unit provided in addition with voltage follower and switch, that of second alternative, with NOT gate, voltage follower, second subtraction unit, and addition unit. EFFECT: enlarged range of signal being analyzed. 10 cl, 8 dwg
