This course is intended for junior undergraduates in computer science and engineering. In this course, we will introduce the basic concepts of semiconductor devices and applications. Some basic circuit theorems will be introduced as well. Since the majority of electronic circuits today are designed as integrated circuits (ICs), we will discuss how to analyze and design the basic elements of integrated circuits with the emphasis on digital logic designs. 《keywords：電路與電子學, ☑️ Circuits and Electronics, ☑️ Semiconductor Material & Diode, ☑️ Basic Circuit Theories, ☑️ Diode Circuit, ☑️ The Field-Effect Transistor (FETs)》