![]() ![]() These junctions construct two P-N diodes or gates and the place located in the center of the gates is called a channel. Then, two P-type junctions are diffused on opposite sides in the middle part of the N bar (figure a). For devising an N channel JFET, first, a narrow bar of N-type semiconductor material (usual silicon) is taken. If the arrow sign is towards the gate, it is N channel JFET and if its direction is outward, it is P channel JFET (figure 5.9) Figure 5.9Ī JFET(Junction Field Effect Transistor) is fabricated alongside an N channel or P channel (although an N channel is normally preferred). There is an arrow sign on its electrodes’ gate. ![]() Its input resistance is very high and reverse bias is supplied on its gate. In other words, a transistor with two PN junctions on opposite sides of its channels is called JFET. This is the first form of FET which is simply known as JFET(Junction Field Effect Transistor). When Vgs Value is Zero and Vds Value is Increased from ZeroĪ FET with a PN junction between its gate and channel is called junction FET(Field Effect Transistor).Control of Id by Changing the Values of Vg.Junction Field Effect Transistor (JFET). ![]()
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