Electronics - Field Effect Transistors (FET) - Discussion
Discussion Forum : Field Effect Transistors (FET) - General Questions (Q.No. 1)
1.
Junction Field Effect Transistors (JFET) contain how many diodes?
Discussion:
26 comments Page 1 of 3.
Bhagatsingh said:
2 decades ago
How can be verified that a JFET contains one diode?.
Shivam Pandey said:
1 decade ago
A diode is basically --- two doped segment of semiconductor fused together. Thus, there forms a POTENTIAL BARRIER.
According to this aspect, JFET should have 2 diode which formed due to 2 side GATES with the channel.
According to this aspect, JFET should have 2 diode which formed due to 2 side GATES with the channel.
Daljit Bajwa said:
1 decade ago
An N-channel JFET consists of a N-type silicon bar and also consists of two p type semicondutors on both sides. These form two pn junctions or we can say two diodes. So the answer to this question will be two diodes.
Pavan kumar.N said:
1 decade ago
Yeah physically it has two diodes but since during the operation we short the substrate to source the effect of the second diode cannot be seen hence the answer is one diode.
Myca said:
1 decade ago
An NPN transistor looks like two diodes with the anodes connected together.The point where the anodes connect is called the base, one cathode is called the collector, and the other cathode is called the emitter.
Similarly the PNP transistor looks like two diodes with the cathodes connected together.
Answer C: 2 diodes
Similarly the PNP transistor looks like two diodes with the cathodes connected together.
Answer C: 2 diodes
Vinay kumar singh said:
1 decade ago
A FET should be consist of two diode two gates and a single channel.
Nagendra pal said:
1 decade ago
Since FET consist one layer of N and two layer of P which are internally connected to each other so it form a single diode.
Abhinav said:
1 decade ago
FET surely contains one layer of n and two layers of p but during its operation the second layer of p or the substrate is shorted. Therefore it is not counted a/c to me. During the working of fet only one layer of p and n act as a single diode.
Pushpendra kumar chaurasiya said:
1 decade ago
Answer of pavan kumar and was right.
If you know the characteristics of JFET at pinch off condition, then potential barrier takes place at only between drain and source, not in between gate and source because both are at same potential.
If you know the characteristics of JFET at pinch off condition, then potential barrier takes place at only between drain and source, not in between gate and source because both are at same potential.
Vivek said:
1 decade ago
Its a two diode structure, two well of same material with one substrate in between them.
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