What is a key characteristic of analog signals?

Analog signals are characterized by having continuous values, meaning they can take on any value within a given range. This contrasts sharply with digital signals, which are made up of discrete values or levels. Because analog signals represent information in a continuous form, they can convey a wide range of data, such as sound waves or temperature variations, where the information is variable over time. This continuous nature allows for a more natural representation of real-world phenomena compared to digital signals.

In essence, analog signals can represent an infinite number of values between two points, enabling a smooth and natural transition of information, which is essential in applications like audio and video processing, where subtleties and nuances are critical. Understanding this key characteristic helps in grasping why analog circuits are suited for certain types of signals and applications.