Practical Digital Electronics for Technicians (eBook)

Front Cover 1
Practical Digital Electronics for Technicians 4
Copyrifgt Page 5
Table of Contents 6
Chapter 1. Setting the scene 12
Introduction 12
The practical exercises 14
Chapter 2. Logic gates 18
Types of logic gate 18
Logic rules and theorems 30
Chapter 3. Combinational logic 34
Problem solving 35
Derivation of the logic statement from the truth table 38
The use of pulses as input signals 40
The traffic light system 43
Chapter 4. Karnaugh mapping 46
The Karnaugh map 47
The two-variable map 48
The three-variable Karnaugh map 53
The four-variable Karnaugh map 57
Don't care/can't happen states 58
Static hazard 62
Chapter 5. Logic families 67
The three types of family 67
Characteristics of logic families 68
TTL logic 78
CMOS logic 92
The ECL OR/NOR gate 95
Interfacing 96
The Schottky diode 98
Chapter 6. Sequential systems (1): Flipflops 100
The bistable condition 100
The latch 102
Bistable (or flipflop) circuits 103
Chapter 7. Sequential systems (2): Counters and shift registers 126
Counters 127
Shift registers 142
Chapter 8. Schmitt triggers and multivibrators 156
The Schmitt trigger 156
Multivibrators 163
Chapter 9. MSI combinational logic circuits 176
Multiplexers 176
Demultiplexers 182
The data transmission system 184
Encoders 186
Decoders 190
Code converters 193
Adders 193
Chapter 10. Display devices 201
The light-emitting diode (LED) 213
The liquid crystal display (LCD) 213
The dot matrix display 213
A final word on LED devices 214
Chapter 11. Analog and digital conversion 216
Digital-to-analog converters (DACs) 216
Analog-to-digital converters (ADCs) 221
Chapter 12. Fault finding 225
Analog fault finding compared with digital fault finding 225
Typical faults 225
The procedures 227
Some examples of fault conditions 228
Equipment for digital fault finding 233
Answers to Questions 236
Chapter 1 236
Chapter 2 236
Chapter 3 239
Chapter 4 243
Chapter 5 244
Chapter 6 244
Chapter 7 245
Chapter 8 247
Chapter 9 247
Chapter 10 247
Chapter 11 247
Chapter 12 248
Index 250