Friday 19 July 2013

Transistors - Introduction

So today marks the start of my transistor listings and there are quite a few to go, nothing exotic, just a lot of audio, rf and switching transistors to come over the next couple of weeks.

In the unlikely event that you don't know what a transistor is, here's what Wikipedia has to say about them:

A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of 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 through another pair of terminals. Because the controlled (output) power can be higher 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.
The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. Following its development in the early 1950s, the transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things.


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