All Questions
Tagged with semiconductors diodes
136
questions
0
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3
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744
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Explanation for drift current
My question is why the concept of drift current or movement of minority charges is necessary while the pn-junction is formed. So drift current was explained to me in more or less this way
As the ...
- 23
3
votes
3
answers
501
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Inability to forward bias diode in a simple circuit
I am struggling with forward biasing a diode in the circuit in the attached.
All the wires are attached properly, as there is continuity. The diode drops only 0.400V with a 9 V battery connected, the ...
- 197
-1
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1
answer
199
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What happens when an LED burns out? [duplicate]
When an LED is burned out, specifically which part is burned out?
Is it the semiconductor or the wires?
Can we use a burned out LED to generate electricity?
5
votes
2
answers
227
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Current-voltage characteristics of silicon carbide luminescence
I am currently studying the textbook Light-Emitting Diodes (3rd Edition) by E. Fred Schubert. Chapter 1.2 Henry Round's demonstration of the first LED says the following:
The mechanism of light ...
- 1,281
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0
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80
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Why will electrons move from hole to hole in the p type at forward bias, but not from hole to n type at reverse bias?
This question is about a diode with a p type and an n type. At the forward bias the electrons from the n type to the p type and from hole to hole in the p type. My questions are these:
At the forward ...
- 299
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2
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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 <<...
4
votes
2
answers
1k
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Is the current in reverse biased PN junction due to drift or diffusion?
Wikipedia says
The saturation current (or scale current), more accurately the reverse saturation current, is that part of the reverse current in a semiconductor diode caused by diffusion of minority ...
- 167
-2
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2
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If leakage current for a diode is 20μA at 20 degrees celsius, what is its value at 40 degrees celsius?
These are the only values provided so I'm not sure how to go about this question. Any help would be greatly appreciated
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267
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Simulating circuit TINA TI
For my assignment I got to run a transient analysis for the duration of 5 periods of sinusoidal input voltage and display the input voltage (ac + dc) and the output voltage on the RL component.
Used ...
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0
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0
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537
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TINA TI Zener diode scheme
I've encountered some problems while trying to get this scheme.
I don't think graph should look like this.
What I am trying is to draw a diagram to record the static characteristic of the Zener diode ...
- 1
1
vote
1
answer
342
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How drift current is independent of bias voltage in semiconductors?
According to my textbook:
The drift current is relatively insensitive to the height of the potential barrier. The reason for this anomaly is the fact that the drift current s limited not by how fast ...
- 113
4
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2
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2k
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Two diodes connected in opposed way show different results (simulation vs physical circuit vs simulation)
I am confused about this circuit found in Electronic Devices and Circuit Theory By Robert Boylestad 10th Ed.
1.
I don't understand why D1 (left diode) has a Vd1 = 0v in equivalent circuit:
When I ...
- 41
0
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0
answers
520
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What exactly does a conduction angle mean in semiconductor electronics?
I read a question about conduction angle at How to calculate the conduction angle of a CVD diode? . However, I am confused as to what is the "exact definition" of conduction angle. There are ...
- 101
1
vote
1
answer
67
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I can't determine the value of diode zener
I can't determine the value of this Zener diode. The marking is KD H2.
1
vote
1
answer
210
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Blocking voltage of diodes
What exactly is blocking voltage in relation with Metal-semiconductor junction diodes? Is it related to breakdown voltage?
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