
A transistor is a three-layer semiconductor device, which may consist of a thin
P-type layer sandwiched between two layers of N-type (as in the NPN
transistor), or a thin layer of N-type material between two layers of P-type
(as in the PNP transistor). It is used in circuits to amplify electrical
signals or to perform as a switch to provide digital functions.
Below are some of the transistors that we have:
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Last Update on Feb 3 2010.