Electronics: Principles and Applications, 9e, introduces analog devices, circuits, and systems. It also presents various digital techniques that are now commonly used in what was once considered the sole domain of analog electronics. It is intended for students who have a basic understanding of Ohm’s law; Kirchhoff’s laws; power; schematic diagrams; and basic components such as resistors, capacitors, and inductors. The digital material is self-contained and will not pose a problem for those students who have not completed a course in digital electronics. The only mathematics prerequisite is a command of basic algebra.