Semiconductors and Diodes

AC Power

CHAPTER

9

Figure 9.1,2,3,4

Electrical Conduction in Semiconductor Devices

Figure 9.5

9-1

A pn junctionFigure 9.5

Figure 9.6

9-2

Drift and diffusion currents in a pn junctionFigure 9.6

Figure 9.7

9-3

Forward- and reverse-biased pn junctionsFigure 9.7

Figure 9.8, 9.9

9-4

Semiconductor diode i-v characteristicFigure 9.8

Figure 9.9Semiconductor diode circuit symbol

Figure 9.10

9-5

The i-v characteristic of the semiconductor diodeFigure 9.10

Figure 9.11

9-6

Large-signal on/off diode modelFigure 9.11

Figure 9.12, 9.13, 9.14

9-7

Circuit containing ideal diode

Figure 9.12

Circuit of Figure 9.12, assuming that the ideal diode conducts

Figure 9.13

Circuit of Figure 9.12, assuming that the ideal diode does not conduct

Figure 9.14

Figure 9.15, 9.16, 9.17

9-8

Figure 9.17

Figure 9.15 Figure 9.16

Figure 9.20, 9.21

9-9

Figure 9.20 Ideal diode rectifier input and output voltagesFigure 9.21

Figure,24,26

9.22

Offset Diode Model

Figure 9.34

9-10

Superposition of load line and diode i-v curve

Figure 9.35, 9.37

9-11

Piecewise linear diode modelFigure 9.35

Figure 9.37

Figure 9.39

9-12

Full-wave rectifierFigure 9.39

Full-wave bridge rectifier

Figure 9.42

9-13

Operation of bridge rectifierFigure 9.42

Bridge rectifier with filter circuit

Figure 9.45

9-14

DC power supplyFigure 9.45

Complete model for Zener diode

Figure 9.49

9-15

(a) A Zener diode voltage regulator; (b) simplified circuit for Zener regulatorFigure 9.49

Figure 9.54, 9.55

9-16

Two-sided diode clipperFigure 9.54

Circuit model for the diode clipperFigure 9.55

Figure 9.56, 9.57

9-17

Equivalent circuit for the one-sided limiter (diode on)

Figure 9.56

Equivalent circuit for the one-sided limiter (diode off)

Figure 9.57

Two-sided (ideal diode) clipper input and output voltages

Figure 9.58

9-18

Voltages for the diode clipper (piecewise linear diode model)

Figure 9.60

Circuit model for the diode clipper (piecewise linear diode model)

Figure 9.59

The Diode Clamp

Figure 9.61, 9.62

Biased Diode Clamp

Diode Peak Detector

Figure 9.70

9-19

Photodiode i-v curvesFigure 9.70

Photodiodes

Photodiode circuit symbol Light-emitting diode circuit symbol

Light-emitting diode (LED)

Analysis of Light-Emitting Diode

Figure 9.74

Optocoupler or Optoisolator