Digital Logic Circuits: CMOS and Verilog Design

This lecture covers the fundamentals of digital systems, focusing on digital logic circuits and their implementation using CMOS technology. The instructor begins by discussing previously implemented arithmetic circuits, including full adders and ripple-carry adders, emphasizing the importance of circuit delay and critical path delay computation. The lecture introduces complementary MOS (CMOS) technology, explaining the structure and functionality of CMOS gates, including the roles of PMOS and NMOS transistors. The concepts of fan-in and fan-out are defined, highlighting their impact on circuit performance. The instructor also addresses parasitic capacitance and its effects on logic gate operation, including power dissipation during dynamic operation. The lecture transitions to the introduction of Verilog, a hardware description language, detailing its syntax and structure for modeling digital circuits. The instructor provides examples of structural modeling, including the implementation of a full adder and a four-bit ripple-carry adder in Verilog, illustrating the design process from conception to circuit implementation.