The name transistor is one that is given to an electromechanical device used to enhance and amplify the power of any electrical object or mail, especially those that we use in our daily lives as appliances, automobiles, watches, appliances related to health, etc. It goes without saying that each of these elements need and work best with a specific type of transistor that is specially designed for the need of energy of the object in question. In this sense, it will not be equal, for example, the transistor a wristwatch that of a washing machine because each must fulfill different functions.
The transistor is a fairly modern element since it was created in the late 1940s, specifically in 1947, by scientists John Bardeen, William Bradford and Walter Houser Brattain, the three Americans (and later Nobel Prize in Physics 1956). These physical sought to create an element that would enhance and increase the energy that could generate an electric object so that it could well meet more and better features without overheating or without overexposure. The main function of the transistor is graduated energy as required, ie, increase if necessary also decrease to prevent overheating.
This graduation of energy is achieved from driving it through the transistor terminals, responsible for change and adapt to what is desired. Thus, a transistor is much easier for example to receive a given electric charge and strengthen it or after it passes through the terminals and injected into the object in question amplify.
Today, the transistor is crucial in making the operation of almost all the technological elements that we use because it allows them to fulfill their functions in the best way possible. Thus, from the emergence of increasingly evolved and perfect transistors, the technology also could gradually improved and constructed objects then increasingly detailed and small or gigantic whose energy is properly adequate.