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Thursday, 22 January 2015

Transistors

Transistors.


Transistor is an electronic semiconductor device for amplifying, converting and generating electrical signals. All types of transistors perform its primary task by the current control high power using low power current. Hence, the two key functions of the device in an electric circuit - a switch and an amplifier.

Bipolar transistor

An electronic semiconductor device, one of the types of transistors, for amplifying, converting and generating electrical signals. Bipolar transistor called because in the device simultaneously involved two types of charge carriers - electrons and holes. This is different from a uni polar (field) of the transistor, in which involved only one type of charge carriers.

FET control PN-transition JFET
FET control PN-transition JFET

Field-effect transistor with insulated-gate MOSFET


A field effect transistor with insulated gate - a transistor whose gate is electrically insulated from the conductive channel of the semiconductor layer dielectric. Due to this, in the transistor very high input impedance (for some models it reaches 1017 ohms).