Electronics - Field Effect Transistors (FET) - Discussion
Discussion Forum : Field Effect Transistors (FET) - General Questions (Q.No. 7)
7.
In the constant-current region, how will the IDS change in an n-channel JFET?
Discussion:
13 comments Page 1 of 2.
Viswajith said:
1 decade ago
Yes as VGS decreases ID decreases but also when VGS increases ID remains constant so I think option D is also correct.
Abdul said:
1 decade ago
The correct option is D. Because constant current region means saturation region, so as Vgs increases Id remains constant.
AR ABHINAV said:
1 decade ago
This is simple explanation that depends on the depletion region, as Vgs increases, it tend to increase the depletion region. As the depletion region decreases it tends to allow less electrons flow through the channel, as the number of electrons flowing through the channel decreases then current also decreases.
Raviteja S said:
1 decade ago
When Vgs increases like 0v, 1v, 2v... Id also increases. According to the graph that we plot Id vs Vds as a function of Vgs.
Sainath said:
1 decade ago
As Vgs (reverse bias voltage gate to source) increases Id decreases because increase in Vgs causes to increase the depletion region and reduce the effective width of the channel so Id will decreases. And if we made Vgs positive Id will remain constant for n channel JFET.
Ramesh ren said:
1 decade ago
As the drain to source voltage is increased this depletion region also widens narrowing down the channel at point both the regions touch pinching off the channel, the drain current increases linearly at first but after pinch off voltage it becomes constant.
Aarth said:
1 decade ago
Both A and D are correct as for me. Because in constant region Ids remains constant till breakdown region occurs.
Abu Sayeed said:
1 decade ago
Answer is 1.
As channel depends on Vgs and Ids depends on channel. So we can say Ids is proportional to Vgs.
As channel depends on Vgs and Ids depends on channel. So we can say Ids is proportional to Vgs.
Vardaman said:
9 years ago
In n channel vgs is negative if vgs increase in more -ve I'd decrease. But vgs decrease I'd automatically increase.
Pankky said:
8 years ago
Answer is correct because characteristic plot between Id and Vds so that according to this if Vds increases then id remains constant.
But here if we want to decrease the current Id then Vgs will be decreased.
But here if we want to decrease the current Id then Vgs will be decreased.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers