100 Inventors Who Made History

Page 52

Transistor

The COMPACT COMPONENT that made modern electronics possible it changed w o Tr

ansistors made electronic equipment smaller and more re Without them, the galiable. dget we use every day s wouldn’t exist.

rl

d

H

Brattain once said, “The only regret I have about the transistor is its use for rock and roll.”

Vacuum tubes

the wo

T the he thr tra ee l e n sta sistor ads a r t elec , or to st llow tric incr op, al c eas urr e ent .

Transistors are used in electronic equipment to switch or amplify electric signals. Before transistors, these jobs were done by vacuum tubes, which looked like light bulbs and were unreliable and bulky. American physicists William Shockley, Walter Brattain, and John Bardeen began developing ideas to rePlace them in the 1950s.

Transistors take over The trio’s small but revolutionary solution, called the transistor, could control electric current just like vacuum tubes did, but was an enormous improvement. The Shockley worked for the transistor used far less power, hardly ever US military during failed, and was so tiny that it made it possible World War II. to have smaller electronic equipment. In 1956, Brattain, Bardeen, and Shockley were jointly awarded the nobel Prize for Bardeen went on to win Physics for their work on transistors.

Circuitry

50

a second Nobel Prize for Physics in 1972.

Early transistors were about the length of the palm of your hand, but improvements to their design led them to become smaller. At first, they were connected to other electronic components on circuit boards, and used in hearing aids, radios, and computers. Now, transistors are mostly found in computer chips—hundreds of millions of transistors can fit on a single chip.


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Acknowledgments

10min
page 130

Index

2min
page 129

Glossary

3min
page 128

Fantastic future

5min
pages 126-127

Total turkeys

5min
pages 124-125

Micro machines

2min
pages 122-123

Bionic body parts

2min
pages 120-121

Vaccination

2min
pages 118-119

Defibrillator

0
page 117

Aspirin

1min
page 116

Diagnostic devices

2min
pages 114-115

Laser

0
page 113

Microscope

1min
page 112

Antibiotics

2min
pages 110-111

Antiseptics

1min
page 109

Chocolate

2min
pages 104-107

Anesthetics

1min
page 108

Fireworks

2min
pages 102-103

Movies

2min
pages 100-101

Personal stereo

1min
page 99

Musical instruments

2min
pages 96-97

Video games

1min
page 98

Sports shoes

1min
page 95

Desk buddies

1min
pages 92-93

Blue jeans

1min
page 94

Robot

2min
pages 90-91

Material world

2min
pages 88-89

Dynamite

1min
page 87

Crane

1min
page 86

Plow

2min
pages 84-85

Keeping it together

2min
pages 78-81

Battery

2min
pages 76-77

Bar code

1min
page 83

Plastic

2min
pages 74-75

Money

1min
page 82

Refrigerator

2min
pages 72-73

Home helpers

1min
pages 70-71

Light bulb

2min
pages 68-69

Internet

1min
page 60

Pendulum clock

2min
pages 66-67

World Wide Web

3min
pages 61-63

Telescope

2min
pages 58-59

Flush toilet

2min
pages 64-65

Satellite

2min
pages 56-57

Computer

2min
pages 54-55

Microprocessor

1min
page 53

Braille

1min
page 41

Transistor

1min
page 52

Radio

2min
pages 46-47

Picture this

2min
pages 48-49

Television

2min
pages 50-51

Phonograph

2min
pages 42-43

Telephone

2min
pages 44-45

Telegraph

1min
page 40

Rocket

2min
pages 30-31

Printing press

2min
pages 38-39

Nuclear energy

2min
pages 32-35

Helicopter

2min
pages 28-29

Paper

2min
pages 36-37

Airplane

2min
pages 26-27

Car

2min
pages 24-25

Bicycle

2min
pages 20-21

Navigational novelties

2min
pages 14-15

Steam engine

1min
page 16

Electric motor

2min
pages 18-19

Caravel

1min
page 12

Submarine

1min
page 13

The wheel

2min
pages 10-11

Steam locomotive

1min
page 17
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