Determine the working of n- channel JFET, Physics

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Determine the working of N- Channel JFET

In N-channel JFET, two p regions are connected with each other (internally or externally) and are called gate (G). Ohmic contacts are made at the two ends of N type semiconductor  bar.   One  terminal  known  as  source  (S)  through  which  majority carriers (electrons in this case) enter the bar. Other terminal as the drain (D) through which these majority carriers leave the bar. However in MOSFET, over left side of the channel, a thin layer of metal oxide (usually silicon dioxide) is deposited. A metallic Gate is deposited over silicon dioxide .Gate is insulated from the semiconductor since  silicon  dioxide  is  an  insulator.  That  is  why  MOSFET  is  also  called Insulated Gate FET. Like JFET, ohmic contacts are made at the two ends (Drain and Source) of the N-type semiconductor bar.

 


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