Electric Circuits Funadamentals

Related Resources: Electrical Design Engineering

Electric Circuits Funadamentals

Electronics, Electrical, Instrumentation Design and Engineering
Electrical, Electronics Online Books

Electric Circuits Fundamentals

Premium Membership Required to view Document/Book

Open:

Preface excerpt

The main objective of the fifth edition of this book remains the same as the previous editions—to present circuit analysis in a manner that is clearer, more interesting, and easier to understand than other circuit textbooks, and to assist the student in beginning to see the “fun” in engineering. This objective is achieved in the following ways:

• Chapter Openers and Summaries Each chapter opens with a discussion about how to enhance skills which contribute to successful problem solving as well as successful careers or a career-oriented talk on a sub-discipline of electrical engineering. This is followed by an introduction that links the chapter with the previous chapters and states the chapter objectives. The chapter ends with a summary of key points and formulas.

• Problem-Solving Methodology Chapter 1 introduces a six-step method for solving circuit problems which is used consistently throughout the book and media supplements to promote best-practice problem-solving procedures.

• Student-Friendly Writing Style All principles are presented in a lucid, logical, step-by-step manner. As much as possible, we avoid wordiness and giving too much detail that could hide concepts and impede overall understanding of the material. Boxed Formulas and Key Terms Important formulas are boxed as a means of helping students sort out what is essential from what is not. Also, to ensure that students clearly understand the key elements of the subject matter, key terms are defined and highlighted.

• Margin Notes Marginal notes are used as a pedagogical aid. They serve multiple uses such as hints, cross-references, more exposition, warnings, reminders not to make some particular common mistakes, and problem-solving insights.

• Worked Examples Thoroughly worked examples are liberally given at the end of every section. The examples are regarded as a part of the text and are clearly explained without asking the reader to fill in missing steps. Thoroughly worked examples give students a good understanding of the solution process and the confidence to solve problems themselves. Some of the problems are solved in two or three different ways to facilitate a substantial comprehension of the subject material as well as a comparison of different approaches.

• Practice Problems To give students practice opportunity, each illustrative example is immediately followed by a practice problem with the answer. The student can follow the example step-by-step to aid in the solution of the practice problem without flipping pages or looking at the end of the book for answers. The practice problem is also intended to test a student’s understanding of the preceding example. It will reinforce their grasp of the material before the student can move on to the next section. Complete solutions to the practice problems are available to students on the website.

• Application Sections The last section in each chapter is devoted to practical application aspects of the concepts covered in the chapter. The material covered in the chapter is applied to at least one or two practical problems or devices. This helps students see how the concepts are applied to real-life situations.

• Review Questions Ten review questions in the form of multiple-choice objective items are provided at the end of each chapter with answers. The review questions are intended to cover the little “tricks” that the examples and end-of-chapter problems may not cover. They serve as a self test device and help students determine how well they have mastered the chapter.

• Computer Tools In recognition of the requirements by ABET® on integrating computer tools, the use of PSpice, Multisim, MATLAB, KCIDE for Circuits, and developing design skills are encouraged in a student friendly manner. PSpice is covered early on in the text so that students can become familiar and use it throughout the text. Tutorials on all of these are available on our website. MATLAB is also introduced early in the book. Design a Problem Problems Finally, design a problem problems are meant to help the student develop skills that will be needed in the design process. • Historical Tidbits Historical sketches throughout the text provide profiles of important pioneers and events relevant to the study of electrical engineering.

• Early Op Amp Discussion The operational amplifier (op amp) as a basic element is introduced early in the text.

• Fourier and Laplace Transforms Coverage To ease the transition between the circuit course and signals and systems courses, Fourier and Laplace transforms are covered lucidly and thoroughly. The chapters are developed in a manner that the interested instructor can go from solutions of first-order circuits to Chapter 15. This then allows a very natural progression from Laplace to Fourier to AC.

• Four Color Art Program An interior design and four color art program bring circuit drawings to life and enhance key pedagogical elements throughout the text. • Extended Examples Examples worked in detail according to the six-step problem solving method provide a roadmap for students to solve problems in a consistent fashion. At least one example in each chapter is developed in this manner.

• Development of improved species of plants and animals for food production
• Invention of new medical diagnostic tests for diseases
• Production of synthetic vaccines from clone cells
• Bioenvironmental engineering to protect human, animal, and plant life from toxicants and pollutants
• Study of protein-surface interactions
• Modeling of the growth kinetics of yeast and hybridoma cells
• Research in immobilized enzyme technology
• Development of therapeutic proteins and monoclonal antibodies

In reviewing the above-mentioned terms, however, biomedical engineering appears to have the most comprehensive meaning. Biomedical engineers apply electrical, mechanical, chemical, optical, and other engineering principles to understand, modify, or control biologic (i.e., human and animal) systems, as well as design and manufacture products that can monitor physiologic functions and assist in the diagnosis and treatment of patients. When biomedical engineers work within a hospital or clinic, they are more properly called clinical engineers .

TOC

PART 1 DC Circuits 2
Chapter 1 Basic Concepts 3
1.1 Introduction 4
1.2 Systems of Units 5
1.3 Charge and Current 5
1.4 Voltage 9
1.5 Power and Energy 10
1.6 Circuit Elements 15
1.7 †Applications 17
1.7.1 TV Picture Tube
1.7.2 Electricity Bills
1.8 †Problem Solving 20
1.9 Summary 23
Review Questions 24
Problems 24
Comprehensive Problems 27
Chapter 2 Basic Laws 29
2.1 Introduction 30
2.2 Ohm’s Law 30
2.3 †Nodes, Branches, and Loops 35
2.4 Kirchhoff’s Laws 37
2.5 Series Resistors and Voltage Division 43
2.6 Parallel Resistors and Current Division 45
2.7 †Wye-Delta Transformations 52
Delta to Wye Conversion
Wye to Delta Conversion
2.8 †Applications 58
2.8.1 Lighting Systems
2.8.2 Design of DC Meters
2.9 Summary 64
Review Questions 66
Problems 67
Comprehensive Problems 78
Chapter 3 Methods of Analysis 81
3.1 Introduction 82
3.2 Nodal Analysis 82
3.3 Nodal Analysis with Voltage
Sources 88
3.4 Mesh Analysis 93
3.5 Mesh Analysis with Current Sources 98
3.6 †Nodal and Mesh Analyses
by Inspection 100
3.7 Nodal Versus Mesh Analysis 104
3.8 Circuit Analysis with PSpice 105
3.9 †Applications: DC Transistor
Circuits 107
3.10 Summary 112
Review Questions 113
Problems 114
Comprehensive Problem 126
Chapter 4 Circuit Theorems 127
4.1 Introduction 128
4.2 Linearity Property 128
4.3 Superposition 130
4.4 Source Transformation 135
4.5 Thevenin’s Theorem 139
4.6 Norton’s Theorem 145
4.7 †Derivations of Thevenin’s
and Norton’s Theorems 149
4.8 Maximum Power Transfer 150
4.9 Verifying Circuit Theorems with PSpice 152
4.10 †Applications 155
4.10.1 Source Modeling
4.10.2 Resistance Measurement
4.11 Summary 160
Review Questions 161
Problems 162
Comprehensive Problems 173
Chapter 5 Operational Amplifiers 175
5.1 Introduction 176
5.2 Operational Amplifiers 176
5.3 Ideal Op Amp 179
5.4 Inverting Amplifier 181
5.5 Noninverting Amplifier 183
5.6 Summing Amplifier 185
5.7 Difference Amplifier 187
5.8 Cascaded Op Amp Circuits 191
5.9 Op Amp Circuit Analysis with PSpice 194
5.10 †Applications 196
5.10.1 Digital-to-Analog Converter
5.10.2 Instrumentation Amplifiers
5.11 Summary 199
Review Questions 201
Problems 202
Comprehensive Problems 213
Chapter 6 Capacitors and
Inductors 215
6.1 Introduction 216
6.2 Capacitors 216
6.3 Series and Parallel Capacitors 222
6.4 Inductors 226
6.5 Series and Parallel Inductors 230
6.6 †Applications 233
6.6.1 Integrator
6.6.2 Differentiator
6.6.3 Analog Computer
6.7 Summary 240
Review Questions 241
Problems 242
Comprehensive Problems 251
Chapter 7 First-Order Circuits 253
7.1 Introduction 254
7.2 The Source-Free RC Circuit 254
7.3 The Source-Free RL Circuit 259
7.4 Singularity Functions 265
7.5 Step Response of an RC Circuit 273
7.6 Step Response of an RL Circuit 280
7.7 †First-Order Op Amp Circuits 284
7.8 Transient Analysis with PSpice 289
7.9 †Applications 293
7.9.1 Delay Circuits
7.9.2 Photoflash Unit
7.9.3 Relay Circuits
7.9.4 Automobile Ignition Circuit
7.10 Summary 299
Review Questions 300
Problems 301
Comprehensive Problems 311
Chapter 8 Second-Order Circuits 313
8.1 Introduction 314
8.2 Finding Initial and Final Values 314
8.3 The Source-Free Series
RLC Circuit 319
8.4 The Source-Free Parallel
RLC Circuit 326
8.5 Step Response of a Series RLC
Circuit 331
8.6 Step Response of a Parallel RLC
Circuit 336
8.7 General Second-Order Circuits 339
8.8 Second-Order Op Amp Circuits 344
8.9 PSpice Analysis of RLC Circuits 346
8.10 †Duality 350
8.11 †Applications 353
8.11.1 Automobile Ignition System
8.11.2 Smoothing Circuits
8.12 Summary 356
Review Questions 357
Problems 358
Comprehensive Problems 367
PART 2 AC Circuits 368
Chapter 9 Sinusoids and Phasors 369
9.1 Introduction 370
9.2 Sinusoids 371
9.3 Phasors 376
9.4 Phasor Relationships for
Circuit Elements 385
9.5 Impedance and Admittance 387
9.6 †Kirchhoff’s Laws in the Frequency
Domain 389
9.7 Impedance Combinations 390
9.8 †Applications 396
9.8.1 Phase-Shifters
9.8.2 AC Bridges
9.9 Summary 402
Review Questions 403
Problems 403
Comprehensive Problems 411
Chapter 10 Sinusoidal Steady-State
Analysis 413
10.1 Introduction 414
10.2 Nodal Analysis 414
10.3 Mesh Analysis 417
10.4 Superposition Theorem 421
10.5 Source Transformation 424
10.6 Thevenin and Norton
Equivalent Circuits 426
10.7 Op Amp AC Circuits 431
10.8 AC Analysis Using PSpice 433
10.9 †Applications 437
10.9.1 Capacitance Multiplier
10.9.2 Oscillators
10.10 Summary 441
Review Questions 441
Problems 443
Chapter 11 AC Power Analysis 457
11.1 Introduction 458
11.2 Instantaneous and Average
Power 458
11.3 Maximum Average Power
Transfer 464
11.4 Effective or RMS Value 467
11.5 Apparent Power and
Power Factor 470
11.6 Complex Power 473
11.7 †Conservation of AC Power 477
11.8 Power Factor Correction 481
11.9 †Applications 483
11.9.1 Power Measurement
11.9.2 Electricity Consumption Cost
11.10 Summary 488
Review Questions 490
Problems 490
Comprehensive Problems 500
Chapter 12 Three-Phase Circuits 503
12.1 Introduction 504
12.2 Balanced Three-Phase Voltages 505
12.3 Balanced Wye-Wye Connection 509
12.4 Balanced Wye-Delta Connection 512
12.5 Balanced Delta-Delta
Connection 514
12.6 Balanced Delta-Wye Connection 516
12.7 Power in a Balanced System 519
12.8 †Unbalanced Three-Phase
Systems 525
12.9 PSpice for Three-Phase Circuits 529
12.10 †Applications 534
12.10.1 Three-Phase Power Measurement
12.10.2 Residential Wiring
12.11 Summary 543
Review Questions 543
Problems 544
Comprehensive Problems 553
Chapter 13 Magnetically Coupled
Circuits 555
13.1 Introduction 556
13.2 Mutual Inductance 556
13.3 Energy in a Coupled Circuit 564
13.4 Linear Transformers 567
13.5 Ideal Transformers 573
13.6 Ideal Autotransformers 581
13.7 †Three-Phase Transformers 584
13.8 PSpice Analysis of Magnetically
Coupled Circuits 586
13.9 †Applications 591
13.9.1 Transformer as an Isolation Device
13.9.2 Transformer as a Matching Device
13.9.3 Power Distribution
13.10 Summary 597
Review Questions 598
Problems 599
Comprehensive Problems 611
Chapter 14 Frequency Response 613
14.1 Introduction 614
14.2 Transfer Function 614
14.3 †The Decibel Scale 617
14.4 Bode Plots 619
14.5 Series Resonance 629
14.6 Parallel Resonance 634
14.7 Passive Filters 637
14.7.1 Lowpass Filter
14.7.2 Highpass Filter
14.7.3 Bandpass Filter
14.7.4 Bandstop Filter
14.8 Active Filters 642
14.8.1 First-Order Lowpass Filter
14.8.2 First-Order Highpass Filter
14.8.3 Bandpass Filter
14.8.4 Bandreject (or Notch) Filter
14.9 Scaling 648
14.9.1 Magnitude Scaling
14.9.2 Frequency Scaling
14.9.3 Magnitude and Frequency Scaling
14.10 Frequency Response Using
PSpice 652
14.11 Computation Using MATLAB 655
14.12 †Applications 657
14.12.1 Radio Receiver
14.12.2 Touch-Tone Telephone
14.12.3 Crossover Network
14.13 Summary 663
Review Questions 664
Problems 665
Comprehensive Problems 673
PART 3 Advanced Circuit
Analysis 674
Chapter 15 Introduction to the Laplace
Transform 675
15.1 Introduction 676
15.2 Definition of the Laplace Transform 677
15.3 Properties of the Laplace Transform 679
15.4 The Inverse Laplace Transform 690
15.4.1 Simple Poles
15.4.2 Repeated Poles
15.4.3 Complex Poles
15.5 The Convolution Integral 697
15.6 †Application to Integrodifferential
Equations 705
15.7 Summary 708
Review Questions 708
Problems 709
Chapter 16 Applications of the Laplace
Transform 715
16.1 Introduction 716
16.2 Circuit Element Models 716
16.3 Circuit Analysis 722
16.4 Transfer Functions 726
16.5 State Variables 730
16.6 †Applications 737
16.6.1 Network Stability
16.6.2 Network Synthesis
16.7 Summary 745
Review Questions 746
Problems 747
Comprehensive Problems 758
Chapter 17 The Fourier Series 759
17.1 Introduction 760
17.2 Trigonometric Fourier Series 760
17.3 Symmetry Considerations 768
17.3.1 Even Symmetry
17.3.2 Odd Symmetry
17.3.3 Half-Wave Symmetry
17.4 Circuit Applications 778
17.5 Average Power and RMS Values 782
17.6 Exponential Fourier Series 785
17.7 Fourier Analysis with PSpice 791
17.7.1 Discrete Fourier Transform
17.7.2 Fast Fourier Transform
17.8 †Applications 797
17.8.1 Spectrum Analyzers
17.8.2 Filters
17.9 Summary 800
Review Questions 802
Problems 802
Comprehensive Problems 811
Chapter 18 Fourier Transform 813
18.1 Introduction 814
18.2 Definition of the Fourier Transform 814
18.3 Properties of the Fourier
Transform 820
18.4 Circuit Applications 833
18.5 Parseval’s Theorem 836
18.6 Comparing the Fourier and
Laplace Transforms 839
18.7 †Applications 840
18.7.1 Amplitude Modulation
18.7.2 Sampling
18.8 Summary 843
Review Questions 844
Problems 845
Comprehensive Problems 851
Chapter 19 Two-Port Networks 853
19.1 Introduction 854
19.2 Impedance Parameters 854
19.3 Admittance Parameters 859
19.4 Hybrid Parameters 862
19.5 Transmission Parameters 867
19.6 †Relationships Between
Parameters 872
19.7 Interconnection of Networks 875
19.8 Computing Two-Port Parameters
Using PSpice 881
19.9 †Applications 884
19.9.1 Transistor Circuits
19.9.2 Ladder Network Synthesis
19.10 Summary 893
Review Questions 894
Problems 894
Comprehensive Problem 905
Appendix A Simultaneous Equations and Matrix
Inversion A
Appendix B Complex Numbers A-9
Appendix C Mathematical Formulas A-16
Appendix D Answers to Odd-Numbered
Problems A-21
Selected Bibliography B-1
Index I-1