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： An amplifier may be selected the place its noise contribution is negligible in comparison with the source resistance through the use of a figure of merit, RS, OP, of the op amp. It could be calculated through the use of an amplifier’s sound specification. LNAs are bui... https://archerjbnuz.blogprodesign.com/55530652/new-step-by-step-map-for-coaxial-switch