FIELD: radio engineering, communication.
SUBSTANCE: apparatus comprises write address counters, random-access memory, a read address counter, a time interval meter, a gating unit, a distributor, a tracking circuit, an inhibit circuit, a repetition period forming unit, a threshold forming unit, two decoders, a flip-flop and an AND element, connected to each other in a certain manner.
EFFECT: high noise-immunity.
2 dwg
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