期刊论文

Characteristic test and application analysis of logarithmic amplifier

中文

电子测试

1000-8519

2018

8

11-13

10.16520/j.cnki.1000-8519.2018.08.003

本校为第一机构

利用对数放大器瞬时压缩的特性,可以有效提高行波采集的动态范围。为探讨对数放大器应用的有效性,分析了其基本原理和特性,重点对其直流传递特性和阶跃响应进行了测试。通过仿真的方式,分析暂态行波经对数变换的输出效果并还原了原始输入信号。测试和仿真结果表明,在输入电流在1m A以下,对数放大器的线性度较好,其频率特性能满足基本的行波采集;经对数变换的信号的动态范围得到压缩且还原后的信号保持较好的一致性。

Using the logarithmic amplifier＇s instantaneous compression feature, the dynamic range of traveling wave acquisition can be effectively improved In order to investigate the effectiveness of the logarithmic amplifier application, the basic principle and characteristics of the logarithmic amplifier are analyzed, and the DC transfer characteristics and step response are mainly tested By means of simulation, the output effect of transient traveling wave through logarithmic transformation is analyzed and the original input signal is restored The te...