![]() ![]() ![]() For their achievements in physics, all three shared the 1956 Nobel Prize. American physicists John Bardeen and Walter Brattain built The first working device was a point-contact transistor invented in 1947 while working under William Shockley at Bell Labs. Julius Edgar Lilienfeld an Austro-Hungarian physicist proposed the concept of a field-effect transistor in 1926, but it was not possible to actually construct a working device at that time. Nowadays, many more transistors are found embedded in integrated circuits but some transistors are packaged individually. Because the controlling (input) power can be lower than the controlled (output) power, a transistor can amplify a signal. One pair of the transistor's terminals to whom a voltage or current applied to controls the current through another pair of terminals. A semiconductor Transistor is composed of material usually whose least three terminals are connected to an external circuit. A semiconductor device is a transistor used to amplify or switch electrical power and electronic signals. ![]()
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