Noise, arising from thermal and other effects, is an inherent characteristic of every operating electronic component, circuit board, and system. Though completely eliminating noise isn’t possible, it can be minimized to ensure that systems ranging from medical equipment to radar RF transceivers operate properly—even in the presence of external conditions such as electromagnetic interference (EMI) and temperature fluctuations.
A good starting point for the design of sensitive equipment is to choose precision low-noise components to help minimize total system noise.