This text is appropriate for a one-semester introductory electronics course in physics and engineering departments. Prerequisites include two semesters of both calculus and physics. Knowledge of differential equations is very helpful. The text uses complex variables to describe circuits and signals and contains a complete treatment of operational amplifiers and their circuits. Impressive coverage of fundamental circuit analysis is provided, and discussions of analog to digital interface, analog signal analysis, and discrete signal analysis are included. Measurement errors in laboratory assignments are covered. An engineering information summary is located on front and back covers for aid in the fabrication of circuits.