利用平均值电压表测量放大器的噪声  

Measuring the Noise of Amplifier with Mean Voltmeter

作　　者：倪树范[1] 

机构地区：[1]绵阳师范学院物理与电子工程信息系,四川绵阳621000

出　　处：《绵阳师范学院学报》2003年第2期50-51,96,共3页Journal of Mianyang Teachers＇ College

摘　　要：噪声是一个随机信号 ,其电压波形是没有规律的非正弦波。由于无法描述噪声电压的时间波形 ,从测量的角度看 ,对噪声电压的测量一般用有效值电压表直接进行。本文根据噪声可以用统计学的方法描述其特性 ,噪声电压的分布规律符合正态分布的特点 。Following the theory that the features of noise can be described with the method of statistics、the distribution rule of noise voltage agrees with the characteristics of normal distribution and by considering the relation between probability consistency function and the scales of mean voltmeter, a common usage of the mean voltmeter used in the lab is introduced to measure the noise of amplifier, the points for attention and the steps of operation in the process of the measurement are also given out in this paper.

关 键 词：平均值电压表 放大器 噪声测量 噪声电压 

分 类 号：TN722[电子电信—电路与系统] TB52[理学—物理]