Animated BJT – How a Bipolar Junction Transistor works | Intermediate Electronics

Animated BJT – How a Bipolar Junction Transistor works | Intermediate Electronics

CircuitBread

4 года назад

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Bipolar Junction Transistors, or BJT's, have been around for decades and are a fundamental portion of modern electronics and computing. For something as simple as two back-to-back PN junctions, these can be difficult to understand how they actually work at the semiconductor level. After laying the foundation for how they're built, we use some basic animations to demo how the electrons and holes move within the BJT to hopefully give you a more intuitive feel for what's going on when you apply a voltage at the different nodes. If this doesn't make sense - go check out our other intermediate electronics tutorials about semiconductors and PN junctions. I also highly recommend reading JB's written tutorial here for more in-depth information: https://www.circuitbread.com/tutorials/bipolar-junction-transistor-bjt-basic-structure-and-operation

Table of Contents:
0:00 Introduction
0:23 Introduction to the bipolar junction transistor
0:41 The different physical regions of a bipolar junction transistor
0:54 The two junctions that are created in NPN and PNP interfaces
1:29 How a BJT is configured to be an amplifier
1:57 Simplified animated demonstration of how the electrons flow through the different portions of an NPN BJT
3:13 Verbal overview of how a PNP compares to the animated example of the NPN version

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Тэги:

#bipolar_junction_transistor #bipolar_junction_transistor_tutorial #bipolar_junction #npn_transistor_tutorial #npn_transistor #npn_vs_pnp_transistor #bjt_transistor #how_bjt_works #npn_bjt #bjt_amplifier #bjt_electrons #bjt_theory #bjt_demonstration #bjt_animation #animated_bjt #uses_of_bjt #uses_of_bjt_transistor #what_is_bjt #transistor_as_amplifier #npn_type_transistor #pnp_type_transistor #simply_electronics_BJT #bjt_transistor_tutorial #bjt_electrons_explained
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Комментарии:

wjjohns04able
wjjohns04able - 06.09.2023 17:39

Delivered at the speed of light 😂

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TahmidIslam Tasen
TahmidIslam Tasen - 01.09.2023 22:02

Nice explanation. A video on exactly how the current is amplified in bjt amplifier?

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please waste your time on my 4 videos#
please waste your time on my 4 videos# - 25.04.2023 18:09

I was confused how collector base junction flow current in reverse bias , cleared my doubt now

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Jose Manuel Huichao
Jose Manuel Huichao - 08.04.2023 21:05

esta ingles la wea

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marre2907
marre2907 - 05.02.2023 00:51

Absolutely wonderful explanation. Thank you.

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John დამალულიქალი
John დამალულიქალი - 07.09.2022 08:32

I was very much stuck on this concept, especially why only a small amount of the electrons actually make it through the base. I now get it! Thanks for the high quality explanation and visuals.

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Ramya Sri
Ramya Sri - 29.03.2022 17:50

Sir can you explain about CE configuration

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Black Imp
Black Imp - 24.12.2021 23:39

I appreciate some others of your videos but threating such interesting and complex subjects in a few seconds without showing what you say step by step with images and formulas it risks to be a useless effort both for advanced viewers who need to refresh some concepts and for intermediate ones which are invested by tons of concepts in a small amount ot time without learning anything.

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Victor Maxwell Peters
Victor Maxwell Peters - 30.11.2021 05:14

How does a free electron which has recombine with hole of base reagion causes a base current as it is in valence band and not conduction band.

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Mehmet Ziya Hoşbaş
Mehmet Ziya Hoşbaş - 29.11.2021 23:12

Thanks

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Ding Bop
Ding Bop - 31.10.2021 11:27

Thanks man. Infinitely more helpful than a university professor!!!

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Sandy Mehta
Sandy Mehta - 26.10.2021 14:48

i have watched several of your tutorials. They are excellent. My one and only suggestion - please don't speak at the speed of the electrons or holes. Allow a short moment for comprehension of the reader. Please bring more such tutorials. Outstanding stuff.

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naftilos76
naftilos76 - 12.07.2021 21:41

I just love the sound clarity, your accent is just so comfortable to follow. Animations make things so much easier to comprehend. Excellent work. Thanks.

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CHANDAN KUMAR
CHANDAN KUMAR - 07.07.2021 21:28

We want like this types of explaination ,,with animation's very better as compare to our coaching and collage professor's ,,we want like this kind of deep knowledge.thankyou very much sir.

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Mansi Joshi
Mansi Joshi - 21.06.2021 17:33

Your every video is such a masterpiece .

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lsxlsx911
lsxlsx911 - 13.06.2021 07:24

Josh, I would have liked to also see the PNP mode of operation discussed in detail - I felt that the 30 second blurb at the end to say that 'everything is reversed compared to the npn' did not do it justice. There's something to be said for actually seeing the electron/hole movement - any chance you could include this as an addendum or in the text ?

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Jason L
Jason L - 10.06.2021 05:49

Great information!

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Steve
Steve - 03.06.2021 08:06

FET are best

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Amro Elkhodrai
Amro Elkhodrai - 09.05.2021 01:45

Dude, you're a genius.

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Dennis Litwin
Dennis Litwin - 01.05.2021 11:33

This really helps, but I don't understand why if the base-collector junction is reverse-biased in the NPN, free electrons from emitter to base would cross the reverse-biased base-collector junction and return to the emitter, since reverse-bias does not allow electron flow. Does it have to do somehow with the relative doping density of base, emitter and collector? Please elaborate on that.

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Muhammad Nada
Muhammad Nada - 25.04.2021 13:27

I heard some terms like drift current and diffusion current in relation to BJT , is the current in the collector considered diffusion or drift ?

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Credible Human
Credible Human - 02.04.2021 19:34

This was incredibly helpful. Thank you so much.

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MD
MD - 15.03.2021 22:41

Why did I have to scroll so much to find such a good video. Curse the algorithm

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멀티팬단
멀티팬단 - 02.02.2021 13:09

Thanks for teaching me what my profs can't lol

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Abhishek Khanna
Abhishek Khanna - 01.02.2021 10:21

I love your videos😄
They are always on point!

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Vivek
Vivek - 05.01.2021 10:02

An underrated channel 👍

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Darakhshan Rashid
Darakhshan Rashid - 12.12.2020 12:18

you said that valence electron move to wire from base but as i know that the valence electrons are attached to its nucleus and didnot move ?corrent me if i am wrong ?

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Darakhshan Rashid
Darakhshan Rashid - 01.12.2020 20:27

But at PN junction, you taught us that when free electrons diffuse across the depletion layer, they lose their energy in overcoming the depression layer, so when they enter the P region, they become valence electrons. But here you said that free electrons pass through the depletion layer easily and they remain free electrons?

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Brandon Eickert
Brandon Eickert - 11.10.2020 23:12

Slowing down just a little bit would help a lot! Other than that these are great!

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Raza Khan
Raza Khan - 10.10.2020 13:01

But what happens inside a BJT when we increase base current in linear region and the collector current increases ok but why the collector emitter voltage starts to be decreasing and after a time both junctions would be forward biased.what happens inside a transistor when it happens?

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Cynthia Sandra
Cynthia Sandra - 02.09.2020 21:24

amazinggg

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God killer
God killer - 15.08.2020 19:06

Plz explain for pnp I know it is opposite to npn but still don't understand.

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PY 18
PY 18 - 16.05.2020 17:55

Thank you for these lectures! Really helpful, looking forward to seeing more content from you guys :)

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Teresa Fernandes
Teresa Fernandes - 14.05.2020 20:09

This channel has been really useful to my subject of Electronic Fundamentals, thanks a lot!!

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Subbalakshmi P.R.
Subbalakshmi P.R. - 24.02.2020 19:56

Loved the delivery of concepts. Although, I'd love (so would other people watching these videos), if they were delivered a little slower. I felt like there was no time for me to think. Loved it. Kudos!

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