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==Basic information==
[[File:Basic JFET.png|thumb|Simplified structure of a JFET]]
[[File:Actual JFET.png|thumb|Actual structure of A JFET a)dual-gated , b)single-gated]]
The FETs are majority charge cayrrier devices.The device consists of active channel through which majority charge carriers,electrons or holes ,flow from the source to the drain.The source and drain are connected to semiconductor through ohmic contacts.The condutivity of channel is a function of potetial applied to the gate.
<ref>http://commons.wikimedia.org/wiki/File:Basic_JFET.png</ref>
<ref>http://commons.wikimedia.org/wiki/File:Actual_JFET.png</ref>
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