All Questions
12
questions
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1
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66
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What is a precise definiton of "cut-in" voltage as applied to diodes?
What is the "cut-in" voltage or knee voltage of a diode or transistor?
In a lot of books I read that the cut-in or knee voltage of a diode (or transistor) is when the diode starts conducting ...
- 1
0
votes
1
answer
54
views
What does the interface between lead(s) and the silicon chip look like inside a semiconductor package?
For a leaded semiconductor, like a diode or a transistor, one of the leads is usually the same piece of metal as the copper pad/heat spreader on the back, which is also shorted to one of the junctions ...
- 749
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
2
answers
120
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Transistor: Getting “incorrect” graph for input voltage to output voltage
I tried drawing the graph of \$v_o\$ vs \$v_i\$ for a bipolar junction transistor. I used the below setup (common emitter:)
By design of how the base is a small part compared to others, \$I_b <<...
0
votes
2
answers
175
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PN Junction paradox or something else? [duplicate]
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1
vote
2
answers
534
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Intuitive way to think of transistor saturation current?
I am having a hard time understanding what saturation current (denoted Is in my textbook) actually means for a transistor.
For a diode, it makes perfect sense, it's the approximate maximum reverse ...
- 199
0
votes
2
answers
1k
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Why can't a combination of two diodes connected back to back act like transistor? [duplicate]
I saw an explanation of the transistor working here by Bill Beaty. I absolutely loved it. But I'm not entirely sure why the action cannot be achieved by two diodes connected back to back by a metal ...
- 157
-2
votes
5
answers
609
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Does transistors and other semiconductors always require printed circuit boards (green ones) and soldering to connect
Do the devices like transistors and other semiconductors always require to be connected in the printed circuit boards the green strips and do they always require to be soldered into the board , cant ...
- 11
1
vote
4
answers
493
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Is forward biasing or reverse biasing an inherent property of a diode?
I read a tutorial about transistors and I reached the following sentence.
"The Bipolar Junction Transistor (BJT) is a three layer device constructed form two semiconductor diode junctions joined ...
- 803
3
votes
2
answers
115
views
Does the N material need to be directly touching the P material?
I know a diode works like:
anode wire --[ P ][ N ]-- cathode wire
Would it also work like so?
...
- 185
12
votes
4
answers
18k
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Why can current flow through the reverse biased base-collector junction (N-P junction) in a BJT with a forward biased base-emitter junction?
If the base-emitter junction of a BJT is forward biased, then current can flow through the reverse biased base-collector junction (N-P junction). This disagrees with my understanding of the PN ...
- 1,655
0
votes
2
answers
390
views
How is the PN junction formed?
I am confused about a couple of points:
When the electrons diffuse from N side to P side, and holes diffuse from P side to N side, negative charged region is formed at the junction in P type and ...
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