When impurities of V A group like arsenic or phosphorus are doped in the semiconductor material, it becomes an n-type semiconductor (n-for the negatively charged electrons). The development of transistor revolutionized the world of electronics.Ī transistor is made of a semiconductor such as silicon or germanium with certain amount of impurities doped in them. These three won the Nobel Prize for physics in 1956. Transistor was first developed in 1948 by three American Physicists, John Bardeen, William Shockley and Walter Brattain. They consume less electricity and produce less heat than vacuum tubes. Transistors are smaller, weightless, last longer and are, less expensive than vacuum tubes. Transistors are now used in place of vacuum tubes in many electronic circuits.
A transistor is a tiny solid state device used to control and amplify an electric signal.
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