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Current flows into the Drain (D), through the channel, and out of the Source (S)

In the normal operation of an n-channel device, the Drain (D) is positive with respect to the Source (S).

Major structure is n-type material (channel) between embedded p-type materialto form 2 p-n junction.

FET is unipolar – uses only one type of current carrier.

BJT is bipolar – conduction both hole and electron.

Can be fabricated with fewer processing.

High input impedance (M)(Linear AC amplifier system).

What is the difference between JFET and MOSFET?.

JFET (junction field-effect transistor).

MOSFET (metal-oxide-semiconductor field-effect transistor).Also used as amplifier and logic switches.Field-effect transistor (FET) are important devices such as BJTs.

CHAPTER 4 :JFET Junction Field Effect Transistor