All Questions
Tagged with semiconductors transistors
118
questions
0
votes
2
answers
1k
views
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
1
answer
104
views
Can really small transistors be modeled as in undergrad textbooks?
Most undergrad textbooks on microelectronics (those covering semiconductors, diodes, BJT's, FET's, etc.) that I have laid my hands on discuss semiconductor concepts such as charge carries, drift, ...
- 155
4
votes
1
answer
260
views
Large SiGe ASICs for digital logic
I am trying to understand if digital ASICs with tens of millions of silicon-germanium gates exist. A comment in another post states (emphasis mine) "SiGe can hit 5 GHz pretty easily even with half a ...
- 11.1k
0
votes
1
answer
115
views
on-state voltage
I am trying to study an ever-on IGBT. in other words, IGBT is tried to be on in a long time. To this purpose, a +15V constant dc voltage is applied to the gate-emitter. But, when connecting a +2V ...
- 49
3
votes
2
answers
2k
views
What does the second code on transistors mean?
I have several transistors, I understand that the last digits on the first line define what the transistor is.
There's a second code as well. I've added some photos.
What does this code mean?
- 333
0
votes
1
answer
203
views
Identifying the logic function of this specific MOS layout
I am not sure about the functionality of the following MOS layout. I came up with the logic function AND(NOT(AB),C).
Can anyone confirm or correct me ?
PS: The steps I made are attached
- 3
2
votes
2
answers
1k
views
Identifying parts of a transistor die
In books, I have studied that in a Transistor, the Base is the layer sandwiched in between Collector an Emitter. Wikipedia also mentions that
"The base is physically located between the emitter ...
- 346
1
vote
0
answers
469
views
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
5
votes
1
answer
2k
views
Some questions on NPN transistor [closed]
The beauty of transistor structure lies in its different areas of each of the layers. Also, the base layer is kept between collector and emitter. We can say that the base acts just like a ‘door’ for ...
- 163
1
vote
2
answers
812
views
UJT Negative Resistance and Ohm's Law
A Unijunction Transistor has a negative resistance region where voltage drops with an increase in current. This was explained to me as a situation where "Ohm's Law is broken". This doesn't sit well ...
- 11
-2
votes
5
answers
609
views
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
-2
votes
1
answer
982
views
How is this circuit working? This is Flashing LED oscillator, I guess. [closed]
this is the video from where I got the idea to make it --
https://youtu.be/1c-fMErO2E4
When one LED turns on, other turns off. Then the other one turns on. This proces is repeated. Now, I'm not sure ...
1
vote
3
answers
336
views
Connecting only emitter to collector-BJT
I started studying the BJT Configurations and how they operate in active mode, saturation mode, and cutoff. And that every two neighboring junctions have either forward or reverse bias, But I wonder ...
- 21
16
votes
3
answers
8k
views
Can a thyristor be built from two transistors?
Supposedly, an SCR/thyristor is just a simple, four layer PNPN semiconductor.
If that's the case..
When a circuit calls for a SCR/thyristor, and there isn't one available, can it be substituted by (...
- 1,089
1
vote
3
answers
418
views
Discerning between transistor types
How do you tell different semiconductors (mainly transistors, sometimes even voltage regulator ICs, etc.) apart?
Do they all basically look the same or are there visual clues to indicate a certain ...
- 1,089