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amr mohamed
amr mohamed

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Date of Birth : 1994-09-29
Join Date : 2010-11-12
Age : 25

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PostSubject: Transistor's History    Transistor's History I_icon_minitimeWed 16 Mar 2011, 9:53 pm

transistor's History

 Transistor's History Transi14

Picture of the first appearance of a transistor which was invented by
Bell Labs Bell Labs in 1947
This was the name of the transistor
point contact transistor

The story of the invention of the transistor

Before the existence of the transistor
There have been radio valves
, invented by Sir Fleming
Marconi, who helped in his early experiments.
Fuse has been produced first in 1904, when it was discovered that if he had a vacuum tube
Baktabin one hot and one cold, it is possible to detect radio waves. In
1906 in Vienna, said Robert von built shoulder on the issue of signs, telephone pole III
It was found that would make it stronger and weak signals are much higher.

On the other hand, the transistor works all what you do for radio valves, but it is more
Reliable and solid and does not need only the smallest part of what is required for the valves of electricity. Have shown
First transistors for the first time by William Shockley, John Bardeen and Walter Bratin in
Bell Telephone Laboratories in the United States of America in General
It has been estimated to the American Lee De Forest improved.

 Transistor's History Shockl11

Sitting William Shockley, John Bardeen on the left and the inventor of
Walter Brattain transistor on the right are three Nobel Prize
Nobel 1956
These inventors discovered that materials such as silicon and germanium do not conduct electricity
Kmquaomat it does not work.
And the truth, it (half the buses). Valselkon is a common presence in the world, where there is
In materials such as sand, granite and quartz.
Shockley has been discovered that by adding small amounts of other material to silicon can be shown
How is the silicon on the passage of electricity through it.

This discovery has led to the development of micro-electric circuits of all modern.

 Transistor's History Transi15

The evolution of the form of transistor

 Transistor's History Tube-t11

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