CRITICAL VOLTAGE SPIKES AND DIPS COUNTER Russian patent published in 2002 - IPC

FIELD: data- metering and computer engineering. SUBSTANCE: counter is designed for counting voltage spikes or dips exceeding various analysis levels for longer time than specified critical values. Counter has ac-to-dc voltage converter, subtraction unit, reference-voltage source, inverter, switch, n comparators, where n is number of amplitude modulus analysis levels of voltage spikes or dips, 2n + 1 one-shot multivibrators, n AND gates, OR gate, and meter. EFFECT: simplified design, facilitated operation and maintenance. 3 cl, 5 dwg