transistors tutorials ... The maximum input impedance one can expect from an emitter follower, is limited by the finite gains of individual transistors (~ 50 to ~ 350). However, there is a way to

Generally transistors fall into the category of bipolar transistor, either the more common NPN bipolar transistors or the less common PNP transistor types. ... History of Transistors

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In electronics, a transistor is a semiconductor device commonly used to amplify or switch electronic signals. A transistor is made of a solid piece of a semiconductor material, with at least three terminals for connection to an external circuit. A voltage or current applied...

The transistor, which permitted the first wave of electronic miniaturization, was invented by William Shockley, John Bardeen, and Walter Brattain in 1947. ... 1947: Invention of the Transistor

The Electronics Club ... Transistors amplify current, for example they can be used to amplify the small output current from a logic IC so that it can operate a lamp, relay or other high current device.

Transistors - Definition, How They are Made & Work ... Prior to transistors, digital circuits used vacuum tubes which had many disadvantages, they were larger, used more energy, and created more heat.

Transistors are composed of three parts – a base, a collector, and an emitter. The base is the gate controller device for the larger electrical supply.

Since a single microprocessor may hold near 5 million transistors, the advantage to 5 million vacuum tubes is obvious.

Bipolar Junction Transistors ... Field-Effect Transistors ... Power Transistors