由于噪音系数的评定,对很多电子系统都具有很重要的意义.设计人员常常要花费大量时间根据图表或一定的公式来进行计算.这里介绍的列线图,可以近似的解决这个问题,而且不需要对比率和db进行来回的换算.下面谈谈图表的原理:噪音系数定义为系统的输入端到输出端信号噪音比的变化,所以噪音系数F为: Due to the noise figure evaluation, it is of great significance to many electronic systems. Designers often spend a lot of time calculating according to the chart or some formula. The nomogram presented here can approximate this problem, and not You need to compare the ratio and db back and forth conversion. Here to talk about the principle of the chart: Noise factor is defined as the system input to output signal-to-noise ratio changes, so the noise factor F is: