All Questions
Tagged with semiconductors transistors
12
questions with no upvoted or accepted answers
2
votes
0
answers
192
views
MOSFET gate substrate voltage
In a MOSFET the channel is formed between gate and the body it would sense to use gate body voltage to form the channel. Why is gate source voltage used to form the channel?
2
votes
0
answers
116
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How does a MOSFET conduct in saturation region?
It is a simple question but I could not find a straightforward answer.
When a MOSFET enters saturation region, the channel length starts to decrease, and the channel width is the smallest near the ...
1
vote
0
answers
200
views
Effect of semiconductor doping on threshold voltage
After reading online, I have modeled this as an relation between the threshold voltage and the doping concentration:
For a N-channel MOSFET on a P-type substrate:
$$
V_{T,N} \propto \sqrt{N_{A}}
$$
...
- 31
1
vote
0
answers
111
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When does the transistor reach the stable status when I add resistor to the emitter
simulate this circuit – Schematic created using CircuitLab
If I add resistor R3, which is an emiter resistor, can it change the value of the base voltage? I've learned that the emmiter voltage ...
- 183
1
vote
0
answers
469
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Can you buy Aluminum Nitride transistors?
We all know wide bandgap semiconductors, currently galium nitride and silicon carbide are the superstars becose many companies make them at relatively reasonable price. They aren't just mere lab ...
- 651
0
votes
0
answers
57
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Power dissipation vs. heat dissipation for transistors and diodes
Are these two concept the same or different for semiconductors? Some power MOSFETS have power ratings in the hundreds of watts, and that's way too high for heat loss.
I try to understand 'power ...
- 749
0
votes
1
answer
44
views
Node Technology in Modern Transistors
i was reading about the new 2nm chip IBM created and through some reading i learned that the "nm" part does not refer to the actual gate length like it did many years ago. Can anyone tell me ...
- 9
0
votes
0
answers
67
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How temperature difference does not affect transistors in CPUs?
Recently I learned about semi-conductors and some devices.
Today I watched a video on youtube about a guy overclocking a cpu to 7.0 ghz, while cooling it with liquid nitrogen to -192 celsius degrees. ...
0
votes
1
answer
110
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Qualitative explaination of Output Characteristic of Transistor (BJT) using Depletion layer between Collector and Base
From my understanding,
The diffusion layer at a p-n junction is an equilibrium of two opposing forces on charge carriers due to 2 forces - Concentration Gradient and Electric Field caused by Bias and ...
0
votes
0
answers
991
views
BJT Active Region - Biasing of BE and BC junction
I am having trouble understanding why the BC junction is considered to be reversed biased in these two models. The way I see it, the base looks to be in a higher potential than the collector junction ...
user263783
0
votes
0
answers
307
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Why do electrons and holes in the base have to recombine in order to create the base current
Khan academy link
In the video above, it is said, that in order for the base current to appear, electrons have to recombine with the holes in the base region.
Why can't they simply go to the base ...
- 111
0
votes
1
answer
108
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Semiconductor common emitter configuration
Please could anybody explain the CE configuration, the graphs of \$I_b\$ vs. \$V_{be}\$ and \$I_c\$ vs. \$V_{ce}\$. I can't understand which current remains fixed and how can one regulate \$V_{ce}\$ ...
- 103