Op-amp noise sources and minimizing system noise

摘要

As noted by Daniel Defoe and Benjamin Franklin, there are only two things that are certain in life: death and taxes. Unfortunately for those that design or use electronics, there is another: noise. Although electrical noise cannot be avoided, a better understanding of the various noise sources and how they each contribute to the overall system noise level enables designers to minimize the impact. From the system perspective, noise can originate from a variety of places. There are noise sources that are generated inside the op amp, along with noise from the passive components that are used within the op-amp circuitry.