论文部分内容阅读
本文分析讨论相关检波器的输出信号杂音比,所谓相关检波器是这样一种装置,它包含两个输入和一个输出并由两个输入滤波器、一个输出滤波器和一个乘积器组成。和以前有过的讨论不同,文中考虑到了输入及输出滤波器的影响,导出了输入及输出信号杂音比关系的公式,讨论了相关检波器的几种特殊工作形式。结果指出,在小输入信号杂音比情况下,输出信号杂音比和两路输入信号杂音比的乘积成正比;在一路输入为大信号(相对于杂音)的情况下,输出信号杂音比和另一路输入信号杂音比成正比;无论在大信号或小信号输入情况下,相关检波器的输出信号杂音比与同样情况下平方检波器的输出信号杂音比是同量级的。
This article analyzes and discusses the relative signal to noise ratio of the output signal of the detector. The detector is a device that contains two inputs and one output and consists of two input filters, one output filter and one multiplier. Different from previous discussions, the paper takes into account the influence of input and output filters, derives the formula of noise ratio of input and output signals, and discusses several special working forms of related detectors. The results show that in the case of small input signal noise ratio, the output signal noise ratio is proportional to the product of two input signal noise ratio; in the case of a large input signal (relative to noise), the output signal noise ratio and the other way The input signal noise ratio is proportional to; no matter in the case of big signal or small signal, the output signal noise ratio of the relevant detector is the same order of magnitude compared with the output signal noise ratio of the square detector in the same situation.