Digital Systems

Many instructors opt to not use the chapters of a textbook in the sequence in which they are presented. This book was written so that, for the most part, each chapter builds on previous material, but it is possible to alter the chap- ter sequence somewhat. The first part of Chapter 6 (arithmetic operations) can be covered right after Chapter 2 (number systems), although this will lead to a long interval before the arithmetic circuits of Chapter 6 are encoun- tered. Much of the material in Chapter 8 (IC characteristics) can be covered earlier (e.g., after Chapter 4 or 5) without creating any serious problems. This book can be used either in a one-term course or in a two-term sequence. In a one-term course, limits on available class hours might require omitting some topics. Obviously, the choice of deletions will depend on fac- tors such as program or course objectives and student background. Sections

PrOjECT MANAGEMENT AND SySTEM-LEvEL DESIGN Several real- world examples are included in Chapter 10 to describe the techniques used to manage projects. These applications are generally familiar to most stu- dents studying electronics, and the primary example of a digital clock is familiar to everyone. Many texts talk about top-down design, but this text demonstrates the key features of this approach and how to use the modern tools to accomplish it.

SIMuLATION FILES This edition also includes simulation files that can be loaded into Multisim®. The circuit schematics of many of the figures throughout the text have been captured as input files for this popular sim- ulation tool. Each file has some way of demonstrating the operation of the circuit or reinforcing a concept. In many cases, instruments are attached to the circuit and input sequences are applied to demonstrate the concept presented in one of the figures of the text. These circuits can then be mod- ified as desired to expand on topics or create assignments and tutorials for students. All figures in the text that have a corresponding simulation file on the website are identified by the icon shown in Figure P2.