Circuit for measuring a of the root mean square of an ac voltage derived measuring magnitude, in particular of the effective value of an ac voltage

摘要

to measure the real value of an alternating voltage in a very low and very high frequencies ranging frequency range, the measured ac voltage by means of a crossover in a low frequency and a higher frequency spannungsanteil divided; the niederfreque after digitization quadriert inte spannungsanteil mathematically, and the hu00f6herfrequente spannungsanteil by an analogue quadrierschaltung quadriert and then digitized. these two digitalwerte to a total value added, from which the desired quantity is calculated by averaging.