| 摘要 |
FIELD: pulse technique; digital systems for evaluating electrical energy characteristics. SUBSTANCE: meter has analog-to-digital converter, reversing counter, numeric comparator, first and second RS flip-flops, stable pulse generator, standard frequency code setting element, AND gates, analyzed signal bus, START bus, buffer register, short-pulse shaper. Each quarter period of analyzed frequency deviation from standard frequency in the range of 100% can be evaluated accurate to 0.025%. EFFECT: simplified circuit arrangement of meter and improved resolution. |
