Several case studies follow. Read the case study in section 4.4 carefully and try to follow along by doing the design on your own. Several other case studies are provided in sections 4.5, 4.6, and 4.7. Browse through these sections to get a feel for the types of problems we may need to solve and for an idea on how they are solved. 248-256 Arithmetic operations are some of the most important functions implemented with Digital logic.
Modern microprocessors rely on efficient, high-speed circuits to perform arithmetic quickly.
The adder circuit is a fundamental building block used by many of these systems. The building blocks of addition include the Half Adder and Full Adder. Understand what these components do and how they can be cascaded to perform multi-bit binary addition. The ripple adder shown in Figure 5.8 has a long worst-case delay. Carry lookahead circuits are added to reduce the delay of the carry signal.