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： I are actually working on a very low sound preamp according to the look by Cannata et al. () that I assumed I'd share in hopes that someone may well gain from it. The input phase is often a cascoded diff pair employing an IF3602 matched JFET pair which https://low-noise-amplifier70135.blue-blogs.com/41518804/new-step-by-step-map-for-coaxial-switch