How to calculate BJT electron flow

Click For Summary

Discussion Overview

The discussion revolves around calculating the number of electrons flowing through a bipolar junction transistor (BJT) when a voltage is applied. Participants explore the theoretical and practical aspects of this calculation, including terminology and relevant resources.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about how to calculate the number of electrons passing through a BJT when a voltage is applied.
  • Another participant points out that the correct terminology is "Base" instead of "Gate" and suggests a Wikipedia article that may provide relevant information.
  • A different participant questions whether the calculation should consider the time over which the electrons flow, suggesting the need for a rate (number of electrons per second).
  • One participant expresses a specific interest in counting the number of electrons that can flow at forward bias in a BJT.
  • A later reply references a book on semiconductor device modeling as a potential resource for finding the answer to the original question.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the calculation method or terminology, and multiple viewpoints regarding the question remain unresolved.

Contextual Notes

There are limitations regarding the assumptions made about the conditions under which the electrons flow, such as the time factor and the specific context of forward bias in BJTs.

RITESHH KAKKAR
Messages
16
Reaction score
0
Hello
How should i calculate number of electrons passing through it
when we apply some gate voltage across it
 

Attachments

  • NPN_BJT_Basic_Operation_(Active).svg.png
    NPN_BJT_Basic_Operation_(Active).svg.png
    9 KB · Views: 494
  • NPN_BJT_Basic_Operation_(Active).svg.png
    NPN_BJT_Basic_Operation_(Active).svg.png
    9.1 KB · Views: 502
Engineering news on Phys.org
Is this the article from which you got that image ?
https://en.wikipedia.org/wiki/Bipolar_junction_transistor

Section "Theory and modelling" addresses your question.

in BJT's we call it "Base" not "Gate".

That article should get you started.

Train your search engine. It wants to help you.

old jim
 
Last edited:
  • Like
Likes   Reactions: berkeman
RITESHH KAKKAR said:
...number of electrons passing through it...
Wouldn't you need the amount of time over which the electrons are flowing? Maybe you mean "number of electrons/second"?
 
  • Like
Likes   Reactions: jim hardy
Hello
I want to count the number of electron that can flow from it at forward bias of bjt
 

Similar threads

Electron Current/movement in P-N junction under forward bias
  • · Replies 3 ·
Replies
3
Views
2K
Faraday disc voltage increase
  • · Replies 3 ·
Replies
3
Views
2K
Understanding the base emitter voltage in a common emitter NPN BJT
  • · Replies 16 ·
Replies
16
Views
11K
What explains the current flow in a LC circuit?
  • · Replies 4 ·
Replies
4
Views
2K
Conductor with high electron mobility (mean free path)
  • · Replies 1 ·
Replies
1
Views
687
Analyzing pushbutton switch ADC circuit edge cases
  • · Replies 4 ·
Replies
4
Views
2K
How BJT transistor works (with conventional current notation perspective)
  • · Replies 19 ·
Replies
19
Views
7K
Why does a transistor in saturation act like a short circuit?
  • · Replies 5 ·
Replies
5
Views
4K
Semiconductor -- Conduction and Valence bands
  • · Replies 1 ·
Replies
1
Views
2K
Earth grounded, where does the current flow?
  • · Replies 19 ·
Replies
19
Views
6K