对数——反对数交直流转换器的频带分析

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对数——反对数交直流转换器的频带分析

杜忠

北京控制工程研究所

发布日期:1988-10-25

THE BANDWIDTH ANALYSES OF LOG—ANTILOG CONVERTER WITH AC TO DC

Du Zhong (Beijing Institute of Control Engineering)

Published:1988-10-25

摘要/Abstract

摘要： 本文从对数——反对数真有效值交直流转换器原理出发,指出输入对数电路中的运算放大器频宽是决定整个转换器频宽的重要因素,并从理论上推导出转换器的频宽公式。这一工作对高精度数字万用表的研制具有重要意义。

关键词: 交流—直流变换器, 运算放大器

Abstract: Taking the fundamental principle of log-antilog true rms-responding ac-to-dc converters as the starting point, the paper points out that the bandwidth of the operational amplifier in input log converter is frequently the primary source determining the upper limit on the ac-to-dc conversion bandwidth, and from the theory, drawing the formula of the bandwidth of the converter.The work has important significarce for the research of high precision DMM.

Key words: AC-DC converter, Operational amplifier, Frequency domain analysis.

杜忠. 对数——反对数交直流转换器的频带分析[J]. .

Du Zhong (Beijing Institute of Control Engineering). THE BANDWIDTH ANALYSES OF LOG—ANTILOG CONVERTER WITH AC TO DC[J]. .