Electronic Signal Amplify Transistor Semiconductor Coffee Mug

A transistor is a semiconductor device used to amplify and switch electronic signals. It is composed of a semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits. Image reproduction rights can be found in the link near the bottom of this description. All Rights Reserved; without: prejudice, recourse or notice (U.C.C. 1-308) Image Reproduction Rights: http://commons.wikimedia.org/wiki/File:Transistor_description_en.svg http://en.wikipedia.org/wiki/File:Transistor_as_switch.svg http://commons.wikimedia.org/wiki/File:NPN_common_emitter_AC.svg