FIELD: electronic engineering. SUBSTANCE: former has control voltage supply 1, synchronizing voltage supply 2, threshold member 3, NOT gates 4 and 9, frequency doubler 5, frequency multiplier 6, reject pulse former 7, sync-type voltage/frequency converter 8, three-input AND gates 10 and 12, two-input AND gates 11 and 15, two-input OR gate 13, binary counter 14, three-input OR-NOT gates 16. EFFECT: improved reliability. 2 dwg
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