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Lesson 1

Lesson 1: Intrinsic and Doped Semiconductors, the p-n Junction and Transistors

Lesson parts

1.1 Conductors, insulators and semiconductorsConductors, insulators and semiconductors1.1

1.2 The silicon crystalThe silicon crystal1.2

1.3 Free electrons and holesFree electrons and holes1.3

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1.4 Motion of holesMotion of holes1.4

1.5 Conduction in a semiconductor compared with a metalConduction in a semiconductor compared with a metal1.5

1.6 Sensitivity of semiconductorsSensitivity of semiconductors1.6

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1.7 Worked examples (Lesson 1)Worked examples (Lesson 1)1.7

1.8 Why dope?Why dope?1.8

1.9 n-type semiconductor (donor impurities)n-type semiconductor (donor impurities)1.9

1.10 p-type semiconductor (acceptor impurities)p-type semiconductor (acceptor impurities)1.10

1.11 The law of mass actionThe law of mass action1.11

1.12 Summary comparisonSummary comparison1.12

1.13 Worked examples (Lesson 2)Worked examples (Lesson 2)1.13

1.14 Formation of the junctionFormation of the junction1.14

1.15 Biasing the junctionBiasing the junction1.15

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1.16 The diode as a switch and as a rectifierThe diode as a switch and as a rectifier1.16

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1.17 Electronic tuning (the varactor)Electronic tuning (the varactor)1.17

1.18 Worked examples (Lesson 3)Worked examples (Lesson 3)1.18

1.19 StructureStructure1.19

1.20 Operation (n-p-n, common base)Operation (n-p-n, common base)1.20

1.21 Current ratiosCurrent ratios1.21

1.22 The transistor as an amplifierThe transistor as an amplifier1.22

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1.23 The transistor as a switch (and inverter)The transistor as a switch (and inverter)1.23

1.24 Worked examples (Lesson 4)Worked examples (Lesson 4)1.24