Introduction to Bipolar Junction Transistors (BJT)

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  • เผยแพร่เมื่อ 23 ธ.ค. 2024

ความคิดเห็น • 223

  • @m.raflyyanuar9886
    @m.raflyyanuar9886 3 ปีที่แล้ว +170

    SUMMARY
    1. Invention of transistor.
    - Invented in Dec 1947 by William Shockley, John Bardeen, and Walter Brattain
    - Got a noble prize in 1956
    2. Use of BJT.
    - Amplifier (of weak signals)
    - Switch (for operations)
    3. Types of BJT (npn and pnp transistor).
    4. Emitter, base and collector regions.
    - J1 = Emitter junction (Emitter with base)
    - J2 = Collector junction (base with collector)
    5. Width comparison.
    - C > E > B
    - C is the biggest because it has to collect electrons and thus producing heat
    - The bigger the width, the better the heat dissipation
    6. Doping comparison.
    - E > C > B
    7. Cross-section view of transistor.
    8. Transistor symbol.
    - NPN the arrow is facing E
    - PNP the arrow is facing C
    9. Regions of operation.
    J1 J2 Operation
    FB RB Active -> Amplifier
    FB FB Saturation -> Logical ON/short circuit
    RB FB Cutoff -> Logical OFF/open circuit
    RB RB Inverted -> Rare used

  • @mdnghbrs1283
    @mdnghbrs1283 3 ปีที่แล้ว +47

    Just one like it's not enough to express the admiration for this channel. Simply the amout of knowledge that this channel give us it's unbelieveble. Massive thanks

  • @dayasagarkudva2689
    @dayasagarkudva2689 5 ปีที่แล้ว +131

    I cleared my electronic devices and circuits-1 with good grades because of you...
    Thanks a lot buddy..

    • @yola587
      @yola587 2 ปีที่แล้ว +3

      please suggest some more channels like NESO ACADEMY for MATHS , PHYSICS AND ELECTRONICS

    • @dayasagarkudva2689
      @dayasagarkudva2689 2 ปีที่แล้ว +3

      @@yola587 Hey, you can search for any topic. It's been a while since I graduated. But there will be like tons of videos. I never sticked to any one channel. But i always preferred Indian guys as it was more in detail and also they used classical method of teaching. Thanks

    • @rushabhjain8598
      @rushabhjain8598 ปีที่แล้ว

      @@dayasagarkudva2689 wow bro would like to know what you are doing now

    • @dayasagarkudva2689
      @dayasagarkudva2689 ปีที่แล้ว +1

      @@rushabhjain8598 I am currently working as a system engineer in an MNC bro😊. Thanks for reaching out

    • @rushabhjain8598
      @rushabhjain8598 ปีที่แล้ว +1

      @@dayasagarkudva2689 oh that's great sir feels good talking to someone after 4 year's haha..did you also do btech in electronics andtelecommunications?

  • @azharmalik8244
    @azharmalik8244 5 ปีที่แล้ว +65

    iam studying Electronics engineering . i was so confused to hear the importance of bjt and was so confused that i would be so difficult to understand but after watching this iam feeling blessed. thanku sir u explained beautifully

  • @sandipkumarp6702
    @sandipkumarp6702 7 ปีที่แล้ว +76

    Simply Amazing!!!!
    Best online lecture I have ever seen.

  • @aryandhakad8495
    @aryandhakad8495 4 ปีที่แล้ว +182

    If you have any doubt, you may ask in comments section and I will not give answer 😂😂😂😂

    • @ebrahimkhalid6387
      @ebrahimkhalid6387 3 ปีที่แล้ว +28

      i swear man, this is the only comment on youtube, that made me actually really laugh.

    • @krishneshtamrakar4693
      @krishneshtamrakar4693 หลายเดือนก่อน +1

      Bhai hasna tha kya?

    • @Suryapratap356
      @Suryapratap356 7 วันที่ผ่านมา

      ​@@krishneshtamrakar4693he won't give u an answer for this question

  • @shantanu2625
    @shantanu2625 4 ปีที่แล้ว +5

    Sire, hats off to you....the way you introduce the topics...makes the...complicated topics lika a cake walk..... thank you Sir....

  • @anthonyrojas9989
    @anthonyrojas9989 3 ปีที่แล้ว +6

    This is fantastic review for me before midterm. Great explanation! Thank you, keep them coming.

  • @aaqibrashidle6655
    @aaqibrashidle6655 3 ปีที่แล้ว +2

    Kaash 1 Billion likes ka option bi hota neso academy k liyai woh bi kam hii hai
    Aap.uss sai zayada deserve krtai hooo

  • @vamsiii_3632
    @vamsiii_3632 หลายเดือนก่อน +1

    00:06 BJT is a three terminal doped semiconductor device used for amplification and switching.
    01:50 BJT is a three terminal device used for amplifying weak signals and for switching operations.
    03:34 Bipolar junction transistors have three regions: emitter, base, and collector.
    05:20 Transistor structure and symbol
    06:55 Differentiating between NPN and PNP transistors based on current direction.
    08:18 A bipolar junction transistor is a combination of two diodes connected back to back.
    10:02 BJT transfers a signal from low to high resistance.
    11:35 Transistor operates in different modes based on the biasing of junctions.

  • @badrboutara-s6y
    @badrboutara-s6y หลายเดือนก่อน +1

    bro , it s unbeleavble who how he explains all this knowleadge in such a short time , a real electronic Master

  • @jeetpranav2304
    @jeetpranav2304 5 ปีที่แล้ว +9

    A transistor has 3 regions,2 junctions(hence 2 depletion layers) and made from 2 PN junction diodes
    In both PNP,NPN area and doping parameters remain the same(eg:area of c>e>b)
    Area of collector is more as it has to collect the carriers and heat is generated.
    Generally,mobility of n is more than mobility of hole hence,npn is preffered over pnp.

  • @manaskumar_17
    @manaskumar_17 5 ปีที่แล้ว +3

    You explain with very simplicity. You makes things easier, THAN YOU.

  • @hermannkumbong5955
    @hermannkumbong5955 7 ปีที่แล้ว +3

    Very detailed and concise explanation. Thank you

  • @malavipande6693
    @malavipande6693 3 ปีที่แล้ว +6

    Through the lectures i cleared my *switching theory* doubts also.................thanks a lot sir

  • @umark2707
    @umark2707 7 ปีที่แล้ว +2

    You are great!
    U teaches in a well disiplened manner.

  • @truegrabbers
    @truegrabbers 5 ปีที่แล้ว +2

    u explained it in a very good way TRANSISTOR = TRANSFER & RESISTOR

  • @AnujArya_Curious
    @AnujArya_Curious 8 ปีที่แล้ว +16

    Finally. Bjt. So confusing sometimes.

  • @keshavjindal3294
    @keshavjindal3294 7 หลายเดือนก่อน +1

    1) collector is most wide since it collects the charges which requires efficient heat dissipation
    2) npn is more widely used since the mobility of electrons is greater than holes.

  • @AKJOSHI28
    @AKJOSHI28 4 ปีที่แล้ว +10

    In cross section view of transistor, base is seems like having more surface area than emitter or it's just drawing mistake...... but after all best explanation and best teacher on you tube. Thanks sir.

  • @arfairam4020
    @arfairam4020 4 ปีที่แล้ว +2

    So useful lecture
    Thanks a lot 😇😇😇

  • @aditisharma6728
    @aditisharma6728 4 ปีที่แล้ว

    I can't thank-you in words .....u are god... 🙏🙏🙏🙏. Thank-you sir.....🥺🥺🥺

  • @sampabasu5108
    @sampabasu5108 4 ปีที่แล้ว +10

    Could you please have some lectures on Operational amplifier and sinusoidal oscillators?
    It would be a great help🙂

  • @kannapurampallavi4600
    @kannapurampallavi4600 3 ปีที่แล้ว +2

    Plz apload diploma subjects briefly it will be very helpful for us to listen because ur way of teaching is really good and cleared tq

  • @badrigarignaneshwar9639
    @badrigarignaneshwar9639 8 ปีที่แล้ว +6

    as you explained bipolar means having two charge carrier electrons and holes, similarly we have same charge carrier in p-n junction diode. Is p-n also a bipolar device

    • @suharsh96
      @suharsh96 8 ปีที่แล้ว

      No, bjt is called bipolar because it has two junctions. WHile a n-p diode have just a single junction

    •  8 ปีที่แล้ว +1

      BADRIGARI GNANESHWAR nop diode is not a bipolar device because only electrons take part in its process wheras in case of bjt electrons and holes take part in its process.thats why bjt is called bipolar device even though hole is an imaginary concept

    • @EmManuel-xw4xp
      @EmManuel-xw4xp 7 ปีที่แล้ว +1

      BADRIGARI GNANESHWAR yes pn junction diodes r bipolar devices as u already wrote the correct explanation of why so
      But there r some diodes like schottky diode

    • @sahanasonu7857
      @sahanasonu7857 6 ปีที่แล้ว +2

      No, in BJT corrent is due to both holes and electrons, i.e sum of those currents, but in diode current is either due to electron or holes

  • @sudhirsharma3435
    @sudhirsharma3435 5 ปีที่แล้ว +14

    You are a great teacher. I want to know whats your name and from where you are. Are you teaching any where or doing this part time because of your interest in teaching and helping students.

  • @rishabhkeshri9513
    @rishabhkeshri9513 2 ปีที่แล้ว

    Amazing explanation to understand

  • @praptighosh1111
    @praptighosh1111 6 ปีที่แล้ว

    so brief step by step easy to understand lecture

  • @emrearslan1797
    @emrearslan1797 6 ปีที่แล้ว

    best lecturer ever

  • @raghava8561
    @raghava8561 5 ปีที่แล้ว +1

    Saved my life😊
    Thanks

  • @UECAshutoshKumar
    @UECAshutoshKumar 2 ปีที่แล้ว +1

    Thank you sir ❤️

  • @sohannaimul2427
    @sohannaimul2427 8 ปีที่แล้ว +4

    regions of operation shown are same for both pnp and npn or not?

  • @zebatabassum4813
    @zebatabassum4813 8 ปีที่แล้ว +21

    sir plz upload the lectures for opamp section as well in this analog circuits series

    • @Shoron09
      @Shoron09 7 ปีที่แล้ว

      are the have uploaded?

  • @hareeshr3791
    @hareeshr3791 5 ปีที่แล้ว

    Awesome clear explanation

  • @geethaareti6904
    @geethaareti6904 5 ปีที่แล้ว +2

    How does the case 1 operates as an amplifier .Explain it clearly.

  • @bibeksingh7773
    @bibeksingh7773 8 ปีที่แล้ว

    WoW! every small and important details explained in an easy manner thank u sooo much sir

  • @bibhutibhusansahoo6019
    @bibhutibhusansahoo6019 3 ปีที่แล้ว +1

    Sir
    in
    the last case of the table
    4th case is rarely used but why it is used i means it's purpose???

  • @neemak8417
    @neemak8417 5 ปีที่แล้ว +1

    Sir, can you say one practical example using the 4.th mode means when J1 is rb and J2 is fb???

  • @bison.academy
    @bison.academy 5 ปีที่แล้ว +3

    when j1 is RB and j2 is FB, i,e. in the rarely used mode , what happens to the doping concentration?

    • @AnoNymous-po5sx
      @AnoNymous-po5sx 4 ปีที่แล้ว

      May be when a strong signal is introduced near emitter base junction, we get weak signal at the collector base junction....Correct me if I'm wrong.

  • @reenak.7361
    @reenak.7361 8 ปีที่แล้ว +2

    Good explained

  • @mahmoudaziz7751
    @mahmoudaziz7751 7 ปีที่แล้ว +1

    Thank you for the lesson, sir.
    You're awesome.

  • @AhmedFaragAli
    @AhmedFaragAli 2 ปีที่แล้ว

    amazing explanation, many thanks

  • @Current_GK3
    @Current_GK3 5 ปีที่แล้ว +3

    Great sir...!!! Thank alot...your way of learning is simply amazing

  • @nikhilvarma1636
    @nikhilvarma1636 6 ปีที่แล้ว

    what is meant by beta heat dissipation which you said at 5:32

  • @aritroray2678
    @aritroray2678 6 ปีที่แล้ว +1

    What happens to transistor in on and off mode? How does it act?

  • @shirishakaleru7442
    @shirishakaleru7442 7 ปีที่แล้ว +4

    Sir you said that base region is small but in cross sectional view it's larger than emitterr...

    • @letmehelp5659
      @letmehelp5659 6 ปีที่แล้ว +1

      Bro look at the width of base between emitter and collector that is actual base region

  • @saisumanthnagasuri7741
    @saisumanthnagasuri7741 6 ปีที่แล้ว +1

    Sir if u don't mind will u explain in detail about four regions of transistors..pleasee

  • @mikeyman4000ify
    @mikeyman4000ify 8 ปีที่แล้ว +1

    You are incredible... thank you so much for this.

  • @muhammadfaisalaslam9442
    @muhammadfaisalaslam9442 8 ปีที่แล้ว +1

    what do you actually mean transfer resistors? little bit confusion about this statement. waiting for your response. thanks.

  • @letmehelp5659
    @letmehelp5659 6 ปีที่แล้ว

    Much better than my teachers 👌

  • @poojagarg8433
    @poojagarg8433 7 ปีที่แล้ว

    very NYC ...all the basic points are covered in this ... tnxx 👌😊

  • @Free_Agent_007
    @Free_Agent_007 8 ปีที่แล้ว +2

    explain about last portion of this lecturer regions of the transistor

  • @gehadali3597
    @gehadali3597 8 ปีที่แล้ว +2

    it is very useful thanks a lot

  • @mohamedessam3054
    @mohamedessam3054 6 ปีที่แล้ว

    this is a great channel go ahead sir

  • @ShaeekhShuvro
    @ShaeekhShuvro 7 ปีที่แล้ว +3

    Why they are in active,saturation,inverted etc mode in case of different condition of junction?

    • @RitvikWadhwa
      @RitvikWadhwa 7 ปีที่แล้ว

      chupp

    • @snnwstt
      @snnwstt 6 ปีที่แล้ว

      It depends on the VOLTAGE that you apply to the different terminals. In fact, it depends on the DIFFERENCE of VOLTAGE. If Vc, Vb and Ve are the voltages, and Vcb = Vc-Vb; Vbe = Vb-Ve, ( you can also have Vce = Vc-Ve) you can "see" when a PN junction is reversed biased or forward biased.

  • @souravdhar1943
    @souravdhar1943 7 ปีที่แล้ว +2

    Sir i love ur way of explaining and teaching a lot. Best tutorials provided ever :*

  • @ateshsaini9342
    @ateshsaini9342 3 ปีที่แล้ว

    Very good teacher

  • @teamece1742
    @teamece1742 7 ปีที่แล้ว

    clear explanation.....excellent work

  • @saifalirehman8677
    @saifalirehman8677 8 ปีที่แล้ว +4

    how can we regard bjt as 2 diodes connected back to back..

    • @saifalirehman8677
      @saifalirehman8677 8 ปีที่แล้ว

      Neso Academy how..??acc to google we cannot..electronics.stackexchange.com/questions/78366/why-cant-two-series-connected-diodes-act-as-a-bjt

    • @saifalirehman8677
      @saifalirehman8677 8 ปีที่แล้ว +1

      Neso Academy thanks😊

    • @ajayreddy6532
      @ajayreddy6532 5 ปีที่แล้ว

      Ebers moll model

  • @baherualemu7129
    @baherualemu7129 5 ปีที่แล้ว

    Thanks sir !!! for you give as this brief lecture.

  • @jomelsagsagat4020
    @jomelsagsagat4020 7 ปีที่แล้ว

    Why does electron goes from n-->p ? and Isn't "conventional" current flows p-->n ?

  • @a_69surajbothara39
    @a_69surajbothara39 3 ปีที่แล้ว

    in the reverse bias condition of collector and base junction how a current can flow, because on increasing current, depletion layer increases as a result current due to majority charge carriers decreases and then their exist a current only due to minority charge carrier so how the current passes from base to collector... If it flows then can we say that at every single time when transistor is on it crosses the breakdown voltage.

  • @sujathagangireddy4781
    @sujathagangireddy4781 6 ปีที่แล้ว

    In the 9:50 J1 FB the Low resistance; J2 RB the High resistance; How can i say low resistance and High resistance respectively?

    • @hamadshah1438
      @hamadshah1438 5 ปีที่แล้ว

      Forward biased means positive terminal of battery connected with positive side of a pn juntion,and vice versa,now electrons from supply will push electrons in n region,depletion layer will reduce so low resistance in fb.

  • @bios546
    @bios546 6 ปีที่แล้ว

    Why does it look like the width of emmiter is larger than that of base in the cross sectional view?

  • @SAISRIVIDYA66
    @SAISRIVIDYA66 7 ปีที่แล้ว +4

    Sir. I have one doubt u r saying that transistor transfers low to high resistance when weak signal at input is given and an amplified version was taken at out put. But amplification name itself suggest that current is amplified then how come d higher resistance comes as earlier ur told. Plz tell me sir

  • @Nick_saluja
    @Nick_saluja 6 ปีที่แล้ว

    In the symbol of transistor...does the circle has a special meaning..?

  • @tulsiram-h3o
    @tulsiram-h3o 10 หลายเดือนก่อน

    sir by doping point of view . emitter is highly doped then base then collector

  • @sonalishinde1100
    @sonalishinde1100 3 ปีที่แล้ว

    Sir electron or holes kaha use kiya jata hai pnp and npn me

  • @charanreddy935
    @charanreddy935 7 ปีที่แล้ว

    sir u said width collector>emitter>base but in the cross section diagram u have shown it as collector>base>emitter can you please explain? rest of the part i understood very very clearly

  • @tpsicmin
    @tpsicmin 2 ปีที่แล้ว +1

    Thanks Sir

  • @sumanthbandaram9801
    @sumanthbandaram9801 6 ปีที่แล้ว +1

    Sir you said cutoff region is off,saturation region is on
    can u explain it why??

  • @shamilatif6298
    @shamilatif6298 7 ปีที่แล้ว +1

    what do transfering of signals mean?

  • @masterhind2036
    @masterhind2036 6 ปีที่แล้ว

    If the base's width is the smallest, why does it look wider in the cross sectional view?

  • @TheSalman70
    @TheSalman70 8 ปีที่แล้ว +1

    thanks good explanation

  • @dineshbabu1492
    @dineshbabu1492 6 ปีที่แล้ว

    Nice lecturing bro...keep on

  • @souravkumar-ue8uj
    @souravkumar-ue8uj 6 ปีที่แล้ว

    if the transistor has two things for current flow : holes and electrons and for that reason it is called bipolar then similarly , diode also has current flow due to both of the above things and so shouldn't be the diode be also called bipolar diode ?

  • @gramesh2109
    @gramesh2109 5 ปีที่แล้ว

    Very good Sir u covered all important points

  • @tarunsaiveer2467
    @tarunsaiveer2467 8 ปีที่แล้ว +10

    sir we want lecture on power amplifiers

  • @freddyxavier09
    @freddyxavier09 6 ปีที่แล้ว

    please explain region of operation ? what do you mean by that ?

  • @quoteStorm8
    @quoteStorm8 6 ปีที่แล้ว

    what makes to decide active ,cutoff,on off region..........just there were cases like both are forward,both are reverse...etc but how?
    actually is decided?

  • @monojitsadhukhan4905
    @monojitsadhukhan4905 6 ปีที่แล้ว

    can you tell me what is the difference between capital NPN transistor and small npn transistor?

  • @vinaychindam880
    @vinaychindam880 3 ปีที่แล้ว

    crystal clear

  • @vidyaranisk8669
    @vidyaranisk8669 5 ปีที่แล้ว +1

    How we get to know it is forward biased or reverse biased

  • @pranavshukla9151
    @pranavshukla9151 6 ปีที่แล้ว

    sir, in what rare cases is inverted mode of operation of a transistor used?

  • @AmitRaj-pr1el
    @AmitRaj-pr1el 7 ปีที่แล้ว +1

    helpful lecture sir

  • @shubhnandasharma8215
    @shubhnandasharma8215 4 ปีที่แล้ว

    Plz add oapamp portion as well

  • @jeebansecretairy9234
    @jeebansecretairy9234 2 ปีที่แล้ว

    WHAT DO WE MEAN BY FORWARD BIAS AND REVERSE BIAS?

  • @RohitSharma-ws2oq
    @RohitSharma-ws2oq 4 ปีที่แล้ว

    Nice video sir....but sir the all video which have you uploaded for BJT are sufficient for b tech first year

  • @boopathysuntharanr1880
    @boopathysuntharanr1880 6 ปีที่แล้ว

    sir is there any detailed explanation for the regions of operation table?

  • @SuryaPrakash-kb3tq
    @SuryaPrakash-kb3tq 7 ปีที่แล้ว

    simply awesome.....................

  • @JawadAli-up2cd
    @JawadAli-up2cd 4 ปีที่แล้ว

    Sir
    what is voltage and current gain in transistor tell me ?

  • @ec036venkateshr9
    @ec036venkateshr9 2 ปีที่แล้ว

    I talk about npn transistor,the electron move to emitter to base then current flow base to emitter how ,electron direction same as current direction

  • @neeeraj9
    @neeeraj9 7 ปีที่แล้ว +1

    plz provide materal related to ujt also.

  • @burhaankhursheed6583
    @burhaankhursheed6583 8 ปีที่แล้ว +1

    plz can u explain op amp as comperator

  • @praveshbarthwal2279
    @praveshbarthwal2279 6 ปีที่แล้ว

    What happens to the transistor action if collector of a transistor is highly doped.

  • @argyapratapsingh9491
    @argyapratapsingh9491 2 ปีที่แล้ว

    sir please provide us a notes ..
    it's humble request from all the students..
    am really your big fan...sir..
    thanks a lot

  • @avinashbarik1293
    @avinashbarik1293 6 ปีที่แล้ว

    Thanks a lot sir

  • @RaviShankar-db5jc
    @RaviShankar-db5jc 7 ปีที่แล้ว

    Sir there is a question about the table which you made at the end.is it applicable only to non transistor or both ?

  • @sjd1998
    @sjd1998 8 ปีที่แล้ว +3

    its very helpfull tnks sir

  • @MuneerShaikRiyadh
    @MuneerShaikRiyadh 6 ปีที่แล้ว

    Sir why are u saying EMITTER-BASE juntn. As EMITTER junctn..?