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transistor
Last modified: Wednesday, September 29, 2004 

 
A device composed of semiconductor material that amplifies a signal or opens or closes a circuit. Invented in 1947 at Bell Labs, transistors have become the key ingredient of all digital circuits, including computers. Today's microprocessors contains tens of millions of microscopic transistors.

Prior to the invention of transistors, digital circuits were composed of vacuum tubes, which had many disadvantages. They were much larger, required more energy, dissipated more heat, and were more prone to failures. It's safe to say that without the invention of transistors, computing as we know it today would not be possible.

  Related Links

Mister Transistor
Hosted by a collector of transistors, this site offers historical information, collector information, an image gallery, and links to electronics and transistor related sites.

Yahoo!'s transistor manufacturers page
Yahoo!'s directory of transistor manufacturers.

Microprocessor Comparison Chart
A cut-to-the-chase guide that compares and contrasts popular processing chips.

Related Categories

Integrated Circuits (ICs)

Microprocessors

Related Terms

capacitor

chip

diode

fab

fabless

inductor

integrated circuit

Moore's Law

MOSFET

nanotube

NMOS

rectifier

resistor

semiconductor

silicon

SOI

wafer

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