Lecture - 10 Transistors

[@khalidmotors]

I never seen this type of excellent lecture on Transistor anywhere. I salute Mr. T.S.Natarajan for this marvellous effort. This is very help full for me to understand the Transistor behaviour and operation. May God live you long with happiness and health.

[@xiangyangliyong1659]

So far, this is the best lecture I have seen on this topic. Thanks a lot.

[@SuperMechtronics]

I appreciate Prof.T.S Natarajan for explanation in great professional way.With this kind explation we can use this knowledge for our practical applications.

[@rimbocha1]

really I'm proud to be an indian proud of our iits and iisc and truly grateful to their efforts no other institution has taken such effort

[@sixstringmania]

after years ive finaly understanded the basics of transistors the correct way.Theres no comparison to the way we did it in schools here in greece.It was only blaaablablabla and a bunch of math.. You are a honorouble person for doing this for free (as knowledge should be all over the world)

[@hospitalbedpan1]

I'm so glad I watched this specific lecture. I always understood how to "solve" amplifier problems, but I never really understood the whole concept of "N" and "P" with the forward bias concepts until I watched this video. Good job :-) After watching all these lectures, I'll be ready for my certification early next year. And by the way, I'm writing this message from Miami, Florida.

[@PranavAshok]

This is just great! I never knew transistors could be made this simple and interesting. Thanks a lot Prof. Natarajan!

[@chamod1995]

you guys are making India famous for education !!!

[@theoriginalanomaly]

Awesome video. By far the best on this subject I have came across. Not so much math that it gets in the way, not so much history and semiconductor talk to get in the way. Just a clear focus on transistors!

[@sinsagoodmansbrother]

This is an excellent presentation. Thank you for posting this. I will be using this lecture to train a small group of technicians about transistor theory. Very well explained!... Thank You Professor....

[@Vishwarion]

I am a year1 Elec-Eng student and to me, this was an amazing learning experience. Ty Prof. Natarajah.

[@manthrikan]

Excellent..Excellent... Excellent... Excellent... Excellent... If this was the way the subjects were taught in colleges, we'd all be scientists !!

[@sujitshahriar]

Thank you very much for the lecture Mr Natarajan...I've been up all night for understanding transistor, you just made my life easier...Thanks again...

[@BoredonOccasion]

Thanks to Professor Natarajan. This was a great help to me in my undergraduate studies.

[@binance2018]

thanks for uploading this video. he spokes very clearly unlike the other professors and lecturers who presented a topic....

[@sgtborup]

This man knows his stuff, keep up the good work !

[@ericbataller7348]

You are educator and communicator, sir...! thank you for this lecture.

[@hospitalbedpan1]

Good video. And here I thought I understood the basics of transistors :-) Never realized how stupid I was on the direction of electron flow in transistors. Now I truly understand how the collector "pulls in" the electrons and creates a path to the load (speaker) for amplification. Two years of walking around stupid!!! Finally, I feel enlightened. No wonder India is creating so many engineers. With teachers like this I"m surprised they aren't leading the world right now.

[@manthrikan]

Excellent..Excellent... Excellent... Excellent... Excellent... If this was the way the subjects were taught in colleges, we'd all be scientists !! Only Indians will give things like this free ;-)

[@vigneshkumaraj]

AWESOME !!!! Way of explaining and language is superb !!! Hats off!!

[@tomyproconsul]

in the Darlington circuit BEFORE he connects the base and the emitter with his hands the resistance is actually infinite because there is no wire there, so he actually decreased the resistance to a finite number when he used himself as a resistor :) hope this helps

[@vaidhyanathanc682]

Thanks, still helpful even after 11 years.

[@komal10492]

That is indeed very nice of you sir, to share your knowledge and help many who are befuddled with the subject. i have a query: how does connecting a resistor across the collector and the base ensure that the base emitter junction is forward biased?

[@balakumaran6088]

I have clearly understand about the torlington concept very well in this lecture and the demonstration is so good sir

[@VinitKhandelwal_Alpha]

love the lecture professor. Very good job by the production team

[@coolbro187]

that guy is a good teacher he explains shit really well and its not his first language. what a beast

[@mankenavenkatesh]

this lecture is really useful sir.thank u so much for ur benevolance in presenting this kind of lecture series

[@aresrosu]

Thank you very much for the lecture! It has been extremely helpful. My only wish is for the video to have a better image quality...I can't always understand what has been written on the screen.

[@payalhebsur1401]

Sir and NPTELHRD, thank you so much..

[@mumbimumba2247]

IT IS TRUE A TRANSITOR IS ONE OF AN ACTIVE DEVICE BY NOW THANKS FOR THE LESSON,GO DEEPER

[@xxxslickslayerxxx]

awsome video, very informative. I'm using this for studying.

[@azkeyz]

Transistors accomplish the amplification by using another power source more accurately we should refure to a transistor as a switch first , amplifire second.

[@Flashanimator10]

@youngdones yeah but those from your pc are microscopic .not that big

[@ChrisYangDOC]

this helped me a immensly!!thank u so much sir finally transistors makes sense!!

[@AxelTiger]

Ive been into electronics for years now and im still tryign to get my head around exactly how a transistor works ha ha!

[@hospitalbedpan1]

And the amplification at the collector side is for VOLTAGE, not current. That's where I was getting confused.

[@hyperloke]

very very good lecture. helped a lot! from Georgia Tech

[@priyankarajasree1216]

thanks Natarajan sir....

[@vidividivicious]

nobody explained me why they're named like they are. Thanks, Prof.N

[@agnivadasgupta]

the base region is very very thin . . .so it has very few depletion electrons to oppose the incoming ones from emitter. . .Again the biasing favours the electrons to go further to the collector. . . Some of the electrons do go down the Vcb supply. . . .but again as this region is very thin. . most electrons simply go across the collector region

[@villian1987]

Thanks allot sir for your contribution on free online education mr to bhagat ho gya aapka

[@styno2010]

Thanks Prof... You are the best!!!

[@padmanabhunin.7519]

excellent no more words mera bharath mahan

[@jaiprakashbhatt2361]

Thanks alot Sir...for elabrote so preciesly...

[@KoreaRwkz]

Do most of the electrons move into the collector region because the voltage is higher over there than at base terminal, hence the attractive force is stronger at the collector region? How come electrons can move across junction BC? Don't the negative charges at the base side of the depletion region repel the electrons and prevent them from doing so? How come electrons leaving the Vcb supply don't get attracted to the positive voltage of the Vbe supply?

[@navneet2986]

It's best to go through chapter-14 of the NCERT XIIth textbook to know the answer.... the explanation is well suited for the curious minds... if still not, do get back & i'll do the digging for u..

[@ROSSIRAVA]

A diode is an active device ( Active device - can amplify and/or rectify).

[@KrishnaSharma007]

no

[@alokchaudhari28]

Thanks a lot NPTEL

[@SreenivasSPaiSreekesh]

Very Good Lecture.. Thank U Sir

[@nangbutinang]

Thanks a bunch 4 posting all these!!

[@shankotte]

thanks for the person uploading this video i will downloading in my pc thanks for aprofasor

[@samratsagardeepghosh4212]

sir in case of current amplification if we remove resistor R and shot circuit the connection what will happen???

[@PwrElec]

Superior lecture as always...

[@binance2018]

Do you have lecture about PLC and PLC programming(programmable logic controller)? Thanks in advance!!!!!

[@mdesm2005]

Interesting. Thanks. Although, I would recommend an update to the pronunciation of the word "circuit" if it's going to be mentioned often. Try something more like "sir - kit" instead of "cir - cute". Thanks again for sharing.

[@MultanAzadariClips]

Which software is he using for demonstration from 48 min? if anyone knows plz tell.............!!

[@susendramadallapalli7957]

why there is a change in slope of input characteristics curve due to change in Vce

[@sudhanwapanse]

very very nice concept clarification

[@mrjagan1]

you are great prof i think you should come here in italy to teach our prof :))

[@anantk0334]

this lecture vrey helpful for our study ....explanation is very simple ......i understood easily....

[@Chr0nalis]

this makes me like indians :) His accent is fine and it's explained thorougly without exaggeration . Thank you Mr natarajan

[@shashwat1330]

singh wtf bhai why so angry???

[@KoreaRwkz]

Can someone explain some questions to me? It's been a really long time and I still don't get how transistors work. He says that since the BC junction is of high resistance and a large current is flowing through it, voltage across BC is high. Does that mean voltage across BC is not a constant? Or is the voltage across BC still dependent on Vcb? How come base current constitutes only the electrons recombined with holes in the base region? Why can't other electrons leave via base terminal?

[@victorious4real1]

Thank you Very Much Sir, Best Teacher Ever, Thanx A mill. :)

[@Allabouthelicopter]

There is some magic in the base....a doubt for me...it's understandable that fwd emitter base lowers pd and electron enter base and through base to posituve termnal of batt but how the hell they get in to the collector ? Coz there already electron present to repel them???

[@ledc131]

Thank a lot, really helps me out.

[@Kaludjer12]

the greatest success that ive ever had was with the Gregs Electro Blog (just google it) definately the most incredible course i've tried.

[@kyokushinfighter78]

Fuck! Learning this is much more useful than staying in my class for one god damn semester !! Thanks Prof Natarajan!

[@mortalrahu]

r ,i have few doubt.1)current and voltage are proportional to each other .....so how can voltage alone increrase or current.....2)in voltage amplification u hve used npn transistor in which output current is towards emitter den how did the lamp behind collector glow.................3)in darlington config if we provide low base current it gets amplified into high emitter current which inturn is connected to base of t2.............so there should be a drop there............!!!!!hoping quick reply...plz clear my confusion

[@supriyar3570]

clear cut explanation. thank you sir

[@casperika]

thanks so much for posting this useful lecture

[@XE1GXG]

Interesting and useful.

[@snoobeagle]

I'm having trouble seeing why electrons emitted into the Base from the Emitter aren't a 1:1 ratio with electrons flowing out of V(be) into the emitter. Anyone have an idea?

[@lazyfar]

awsum job prof....

[@gautamgehlot5081]

it clear my basics and dou'bt about transister>>>>>>...

[@Santoshkmr0611]

HOW COME THAT RESISTANCE IS TO BE INSERTED AT BASE FOR SURE IF I DONT PUT A RESISTANCE THERE WILL THE BULB GLOW AND MENTIONED TRANSISTOR IS PNP OR NPN WOULD SOMEONE PLEASE ANSWER?

[@anothershakey]

@constcon define "clear" ...

[@kurmaeshwarsaisrinivas7730]

A transistor is a three terminal device. One terminal is called emitter, one collector and in between them is base. Now, during biasing the junction between emitter and base is made forward biased and the junction between collector and base is made reverse biased. My question is that if one of the junction of a transistor is reverse biased, how does the transistor allow current to flow through it because the reverse biased junction (diode) doesn't allow the current to flow through it? Plz... Answer My Question Sir I hav a doubt in it..

[@ellipticality]

Eshwar Sai Srinivas You are right, it needs to be forward biased from base to emitter and also forward biased from collector to emitter. Otherwise it will not work.

[@kurmaeshwarsaisrinivas7730]

+ellipticality Thnks For Your Response..!! :)

[@kurmaeshwarsaisrinivas7730]

+tarun purohit Thnk Q For Your Answer.. Mr. Tarun Purohit :)

[@LtShifty]

@constcon You mean Scotland? Scotland isn't part of England, it is part of Great Britain. :)

[@ajaykolkol3072]

Mine blowing lecture

[@kabandajamilu9036]

So nice sir

[@thanasisathanasi4965]

I had to skip to 48:44 for the interesting part

[@masanganisetafadzwajohn4344]

How can i download the videos?

[@vigneshkumaraj]

There is no such thing as the "right accent". Different people pronounce words differently depending on their region and they find other people's pronunciation different and little difficult to understand the first time. So lets just focus on the subject.

[@emanuelebrunelli2360]

Molto bello! grazie professore! Thank you so much

[@amythehacker]

you can use keepvid.com also if you don't have youtube downloader...

[@tajiknomi]

hay guys...I have NPN transistor TO-92 package.... How can i find the maximum Voltage to operate it on Collector & base..??if some1 knows....plzz reply me...........max Operating voltage & current..>>???

[@gagandeep426]

it is realy very good

[@smile0dont0cry]

thank you very much Pro. very clear ^_^

[@KoreaRwkz]

I'm getting frustrated. I'm ashamed to say it's already been 1 month (although I don't study every single day of the month) since I've been attempting to understand transistors. Are the answers to my queries obvious? Because I seem to be the only one asking these same questions in the youtube tutorial videos on transistors like this one. So far I haven't gotten answers yet. So anyone who can answer my questions, please do so. I thank you in advance. My semester is starting and I'm worried.

[@noureldinmohamed5395]

well think interm of car reveres, forward another way it's Gate functioning OR NOT And

[@harshanaatapattu6239]

great sir....

[@bipeshmandal8576]

it is clear that, by using zener diode we can bound for a fixed voltage.but there are a great problem while using zener that is .when voltage cross the zoner voltage then great amount of current flow through zener diode which can't be use thus it reduce efficiency of machine.can anyone solve my problem.

[@tehpwnereryeah]

i can't understand what he's saying, majority of electrons and majority of "holes"? are these free electrons, i don't understand

[@cortexedge]

@AxelTiger the same here ;]]

[@girirajpathak7252]

kyon voltage amplification ho gya

[@LiahQuinAfrican_Espresso]

thank you so much :)

[@Newbpwng]

good lecture

[@videoviewerviewer4107]

Thank You Sir

[@rockmelody9945]

thanks a lot sir

[@112jhony]

Very very nice thanks