电路基础（英文版第6版·精编版）

　　本书前5版获得了极大的成功，第6版更新了所涉及领域的一些内容和较新的研究进展，按照国内高校电类专业“电路分析基础”“电路理论基础”课程的本科教学基本要求对原版进行了删减，以便更有针对性。适合用做双语授课或英文授课的教材。全书分为直流电路、交流电路，还囊括了学生需要掌握的所有常用数学公式和物理基本原理。利用六步解题法。求解和解决电路问题的六步法贯穿全书，以帮助学生建立一个求解问题的系统方法，更好地理解理论并减少计算错误。结合工程实际应用。适合用做双语授课或英文授课的教材。还新增和修订了大量章后习题，为学生提供了充分的练习，同时帮助学生掌握关键概念。

　　CharlesK.Alexander分别于1967年和1971年获得俄亥俄大学的电气工程学硕士学位和博士学位，目前为美国克利夫兰州立大学Fenn工学院电气与计算机工程系教授以及电子学与航空航天技术研究中心（CREATE）的主任。他是IEEE的会士，曾任IEEE主席和CEO。他于1984年获得IEEE百年纪念奖章，还先后荣获英国工程委员会颁发的杰出工程教育成就奖和杰出工程教育领导奖。MatthewN.O.Sadiku博士，美国PrairieViewA＆M大学教授，兼任IEEETransacfionsonEducation杂志副主编。他曾在朗讯、波音等公司从事研发工作，发表过百余篇学术论文，出版过20余部著作。

Contents
Prefaceiv
AbouttheAuthorsx
PART1DCCircuits1
Chapter1BasicConcepts3
1.1Introduction4
1.2SystemsofUnits5
1.3ChargeandCurrent6
1.4Voltage9
1.5PowerandEnergy10
1.6CircuitElements14
1.7ProblemSolving16
Problems20
Chapter2BasicLaws23
2.1Introduction24
2.2Ohm’sLaw24
2.3Nodes,Branches,andLoops29
2.4Kirchhoff’sLaws31
2.5SeriesResistorsandVoltageDivision37
2.6ParallelResistorsandCurrentDivision38
2.7Wye-DeltaTransformations45
2.7.1DeltatoWyeConversion
2.7.2WyetoDeltaConversionProblems51
Chapter3MethodsofAnalysis59
3.1Introduction60
3.2NodalAnalysis60
3.3NodalAnalysiswithVoltageSources66
3.4MeshAnalysis71
3.5MeshAnalysiswithCurrentSources76
Problems78
Chapter4CircuitTheorems89
4.1Introduction90
4.2LinearityProperty90
4.3Superposition93
4.4SourceTransformation97
4.5Thevenin’sTheorem101
4.6Norton’sTheorem107
4.7MaximumPowerTransfer111
Problems113
Chapter5OperationalAmplifiers121
5.1Introduction122
5.2OperationalAmplifiers122
5.3IdealOpAmp126
5.4InvertingAmplifier127
5.5NoninvertingAmplifier129
5.6SummingAmplifier131
5.7DifferenceAmplifier133
5.8CascadedOpAmpCircuits137
Problems140
Chapter6CapacitorsandInductors151
6.1Introduction152
6.2Capacitors152
6.3SeriesandParallelCapacitors158
6.4Inductors162
6.5SeriesandParallelInductors166
Problems170
Chapter7First-OrderCircuits179
7.1Introduction180
7.2TheSource-FreeRCCircuit181
7.3TheSource-FreeRLCircuit185
7.4SingularityFunctions191
7.5StepResponseofanRCCircuit199
7.6StepResponseofanRLCircuit206
Problems210
Chapter8Second-OrderCircuits219
8.1Introduction220
8.2FindingInitialandFinalValues221
8.3TheSource-FreeSeriesRLCCircuit225
8.4TheSource-FreeParallelRLCCircuit232
8.5StepResponseofaSeriesRLCCircuit237
8.6StepResponseofaParallelRLCCircuit242
Problems245
PART2ACCircuits253
Chapter9SinusoidsandPhasors255
9.1Introduction256
9.2Sinusoids257
9.3Phasors262
9.4PhasorRelationshipsforCircuitElements271
9.5ImpedanceandAdmittance273
9.6Kirchhoff’sLawsintheFrequencyDomain275
9.7ImpedanceCombinations276
Problems282
Chapter10SinusoidalSteady-StateAnalysis289
10.1Introduction290
10.2NodalAnalysis290
10.3MeshAnalysis293
10.4SuperpositionTheorem297
10.5SourceTransformation300
10.6TheveninandNortonEquivalentCircuits302
Chapter11ACPowerAnalysis317
11.1Introduction318
11.2InstantaneousandAveragePower318
11.3MaximumAveragePowerTransfer324
11.4EffectiveorRMSValue327
11.5ApparentPowerandPowerFactor330
11.6ComplexPower333
Problems337
Chapter12Three-PhaseCircuits345
12.1Introduction346
12.2BalancedThree-PhaseVoltages347
12.3BalancedWye-WyeConnection351
12.4BalancedWye-DeltaConnection354
12.5BalancedDelta-DeltaConnection356
12.6BalancedDelta-WyeConnection358
12.7PowerinaBalancedSystem361
Problems367
Chapter13MagneticallyCoupledCircuits373
13.1Introduction374
13.2MutualInductance375
13.3EnergyinaCoupledCircuit382
13.4LinearTransformers385
13.5IdealTransformers391
13.6IdealAutotransformers399
Problems402
Chapter14FrequencyResponse413
14.1Introduction414
14.2TransferFunction414
14.3TheDecibelScale417
14.4BodePlots419
14.5SeriesResonance429
14.6ParallelResonance434
14.7PassiveFilters437
14.7.1Low-PassFilter
14.7.2High-PassFilter
14.7.3Band-PassFilter
14.7.4Band-StopFilter
14.8ActiveFilters442
14.8.1First-OrderLow-PassFilter
14.8.2First-OrderHigh-PassFilter
14.8.3Band-PassFilter
14.8.4Band-Reject(orNotch)Filter
Problems449
AppendixAAnswerstoOdd-NumberedProblemsA-1