Asalam O Alaikum!
In the 21st century. We see the technology like never before. The world's technology before 1950s was quite limited. There was no internet, only few places could afford landline telephone and also there was no fast computers. but after 20 years in 1970s we see a lot of change in the technology.
Figure 1
Figure 2
In the above two picture there is a huge difference in the computers of 1950s and 1970s respectively. The figure1 represents the common computer of 1950s which as big as a room while the figure2 represents the computer of 1970s. With in just 20 years the computer were made not just smaller but compact as well. These 1970s computer were well efficient and fast as compared to the 1950s.
Also this is not it. Within 80 years of timespan humans have made marvelous inventions and invocations in the field of electrical, electronics and computer science technologies . Nowadays computers small enough to fit in the palm of your hand as shown in figure 3.
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| Figure 3 |
The scope or mind blowing fact does not end just here. But nowadays the world is using the fastest internet on the planet ie. 5G. which is estimated to be 100 times faster than 4G technology.
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| Figure 4 |
The Question arises. How is this even possible in just short period of time. ? OR How the technology can grow so fast?
The answer to this simply looking tough question is TRANSISTOR.
Transistor:
Transistor is the invention which brought revolution in almost all fields of technology. like Medicine, Engineering, Computers, Space Technology and much more.
This simple three terminal device have revolutionized the world in such a way that most of the todays technology is depended on the transistor.. Figure 5 shows the transistor.
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| Figure 5 |
Transistor is three terminal semiconductor device used to switch or amplify the electrical signal or power.
The word transistor is a combination of transfer and resistance. This is because it transfers the resistance from one end of the device to the other end or we can say, transfer of resistance. Hence, the name transistor. Transistors have very high input resistance and very low output resistance.
The transistor was successfully demonstrated on December 23, 1947 at Bell Laboratories in Murray Hill, New Jersey. Bell Labs is the research arm of American Telephone and Telegraph (AT&T). The three individuals credited with the invention of the transistor were William Shockley, John Bardeen and Walter Brattain.
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