All Questions
Tagged with semiconductors diodes
14
questions with no upvoted or accepted answers
3
votes
1
answer
101
views
Why is diffusion current due to p side in a diode inversely proportional to doping concentration of p side in the case of forward bias?
In a diode at equilibrium, there are Pn holes on the n side of the junction. These are maintained by the dynamic equilibrium of diffusion due to holes = drift due to holes. When a forward bias is ...
2
votes
0
answers
57
views
How does the stored charge gets decayed when going from forward bias to zero bias?
In a pn junction diode when forward biased, excess electrons and holes get stored in p and n regions respectively.
If we short the diode by connecting p,n terminals with a wire,
how do these stored ...
- 1,150
2
votes
0
answers
76
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How much of a surface mount PIN diode is semiconductor?
The problem: manufacturers provide a lot of information on the operation and characteristics of the devices, but not on what's inside.
I'm trying to incorporate the effects of a surface mount PIN ...
- 21
1
vote
1
answer
219
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Formula for efficiency of half wave rectifier
I came across this formula for rectification efficiency of half wave rectifier:
η= (40.6 *resistance of load resistor )/ (resistance of load resistor+ resistance of secondary of transformer + ...
1
vote
0
answers
50
views
Diodes when voltage is applied
Does the hole injection take place from p semiconductor to n semiconductor in a pn junction diode? Or it takes place only in the case of a transistor?
1
vote
1
answer
92
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In this semi-ideal photodiode, what would be the physical interpretation of this current?
A real photodiode can be expressed as a circuit made of several ideal components, it looks something like this:
simulate this circuit – Schematic created using CircuitLab
I copied it from here ...
0
votes
1
answer
106
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Contribution of hole diffusion current and electron diffusion current in a pn junction
I have recently got to learn that the hole diffusion current and electron diffusion current both point towards the N side in a PN junction? And the diffusion current is hence towards the N side.
And ...
- 23
0
votes
1
answer
71
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Diodes in parallel reduce current compared to single measurement
I have a photonics integrated circuit with two quantum well diodes. (exact description below)
If I measure the IV curve for each individual diode I get pretty much the same curve for both. but if I ...
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
0
answers
115
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MOSFET diode configuration expression for dynamic bias
I'm trying to think of an elegant way of analytically expressing the gate voltage as a function of time \$V_g(t)\$ (= \$V_d(t)\$) for the diode configured MOSFET below.
The sources VDD and V1 are ...
- 1
0
votes
0
answers
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
0
votes
0
answers
267
views
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 ...
- 1
0
votes
0
answers
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
0
votes
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