This course reviews the transistor and wire characteristics and models in modern digital CMOS technologies. Performance metrics for digital circuits are introduced. Design and optimization of various types of digital integrated circuits are discussed. They include static combinational logic circuits, dynamic combinational logic circuits, and sequential logic circuits. An exemplary arithmetic circuit is studied. The course also covers the design of memory and array structures, noise in digital systems, I/O and signaling conventions. (Not for students who have taken ELEG4201 or ELEG4260.)