Electronic Technology > Digital Logic Systems

Digital Logic Systems

Course Number: 791

The Digital Logic Systems textbook compares analog and digital switching circuits. It explains Boolean logic functions and describes TTL and CMOS logic, as well as IC logic devices. It explains how flip-flops, clock circuits, counters, multiplexers, and memory circuits work, and describes the sections and interfaces in functional logic systems, including microprocessors. It concludes by describing proper methods for detection and correction of common fault potentials.

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Table of Contents

Chapter 1: Digital Logic Fundamentals

Topics: Digital logic; Boolean algebra; Logical AND, OR, NOT function; Positive and negative logic; NAND logic; Combining logic circuits; TTL logic; IC logic devices

Learning Objectives:

  • Explain the difference between digital and analog circuits.
  • Describe AND, NOT, and OR logic functions.
  • Explain how solid-state switches can perform logic functions.
  • Compare equivalent NAND and NOR gates using positive and negative logic.
  • Discuss the importance of TTL and CMOS circuits.

Chapter 2: Logic Building Blocks

Topics: Sequential logic; Flip-flops; Clock circuits; Schmitt triggers; Frequency dividers; Pulse counters

Learning Objectives:

  • Describe the function of a logic clock.
  • Explain the operation of a flip-flop.
  • Discuss the differences among clocked R-S flip-flops, D-latches, and J-K master-slave flip-flops.
  • Explain how to convert between the decimal and binary number systems.
  • Discuss the use of BCD and the octal and hexadecimal number systems.

Chapter 3: Medium- and Large-Scale ICs

Topics: Counters; Serial vs. parallel data transmission; Registers; Multiplexers; Decoder/demultiplexers; Arithmetic circuits; LSI memories

Learning Objectives:

  • Explain the operation of each of the following counters: ripple, BCD, synchronous, and up/down.
  • Describe the operation of a shift register.
  • Discuss the difference between multiplexers and decoders/demultiplexers.
  • Define the terms read, write, serial access, and random access as they apply to memories.
  • Discuss the purposes of RAM and ROM devices.

Chapter 4: Functional Logic Systems

Topics: Logic subsystems; Microprocessors; I/O subsystems; Noncontact switches; Multiple-bit I/O devices; Data codes, displays, and transfer

Learning Objectives:

  • Describe the sections of a basic logic system.
  • Compare a ROM, a PROM, and a PLA.
  • Name the basic parts of a microprocessor.
  • Describe common kinds of I/O interfaces and data displays.

Chapter 5: Troubleshooting Logic Systems

Topics: Gathering information; Isolating the problem; Localizing the trouble; Interpreting logic diagrams; Timing waveforms; Test equipment

Learning Objectives:

  • Describe seven external faults that can affect solid-state circuits.
  • List the major steps in efficient troubleshooting.
  • Name information sources for identifying system malfunctions.
  • Explain how to trace a faulty component by using a troubleshooting tree.
  • Explain how to use various kinds of test equipment to pinpoint system faults.Lesson

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  •    Chapter 1: Digital Logic Fundamentals
  •    Chapter 2: Logic Building Blocks
  •    Chapter 3: Medium- and Large-Scale ICs
  •    Chapter 4: Functional Logic Systems
  •    Chapter 5: Troubleshooting Logic Systems

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