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： Radio telescopes incorporate LNAs to seize weak electromagnetic alerts from celestial bodies. These specialised amplifiers work with sounds temperatures down below 15 Kelvin to detect cosmic alerts at electrical power levels of -130 dBm. Coaxial switches also come acr... https://alphonsew899tnh3.humor-blog.com/profile