Digital Logic Circuits: CMOS and Verilog Modeling

This lecture covers the fundamentals of digital logic circuits, focusing on the implementation technology of CMOS (Complementary Metal-Oxide-Semiconductor) transistors. It begins with an introduction to NMOS and PMOS transistors, explaining their operation as switches and logic gates. The lecture then delves into CMOS circuit structures, highlighting the roles of pull-up and pull-down networks. The instructor discusses voltage levels representing binary values in digital circuits, emphasizing real voltage waveforms and propagation delays in logic gates. Key concepts such as fan-in, fan-out, and parasitic capacitance are introduced, along with their implications for circuit performance. The lecture also addresses power dissipation in logic gates and the importance of dynamic current flow. Finally, the instructor introduces computer-aided design (CAD) processes for digital circuits, focusing on Verilog as a hardware description language, and provides examples of structural modeling, including a full-adder and a four-bit ripple-carry adder.