This slide book presents, discusses, and shows how to understand, develop, and use semiconductor devices to design analog integrated circuits (ICs). The underlying objective is to explain and illustrate how to model, analyze, and design analog ICs using bipolar and MOS technologies. The material places emphasis on basic understanding and critical thinking, in other words, on intuitive grasp of how semiconductor devices work individually and collectively in microelectronic circuits. Ultimately, the material seeks to furnish the reader with a physical and intuitive view of solid-state circuits that transcends rigorous mathematical and algebraic formulations to empower the reader with the tools necessary to design innovative and complex ICs.