噪声系数通常用于衡量一个电路和或者系统内部噪声大小，它通常用于比较不同电路或者系统噪声性能的好坏。噪声系数的定义如下： This short article demands added citations for verification. Please assist strengthen this text by adding citations to trustworthy resources. Unsourced substance could possibly be challenged and taken off. This amplifier can be utilized as an intermediate-frequency or... https://freemani677mfy0.blogsvila.com/profile