Transistor working in tamil
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- Опубліковано 14 жов 2024
- Transistor working Principle of Operation.
There are different types of transistor available in the market, but for sake of understanding, we will consider a common emitter mode of NPN transistor. For this let us recall the basic structural features of npn bipolar junction transistor. Its emitter region is heavily doped and wider hence the number of free electrons (majority carriers) is large here.
The collector region is also wider but it is moderately doped hence the number of free electrons is not as much as the emitter region. The base region is diffused in between the wider emitter and collector region but the base region is quite thin compared to the outer emitter and collector region and also it is very lightly doped so the number of holes (majority carriers) is quite small here.
Now, we connect one battery in between emitter and collector.
The emitter terminal of the transistor is connected to the negative terminal of the battery. Hence the emitter-base junction becomes forward biased, and base-collector junction becomes reverse biased.
In this condition, no current will flow through the device. Before going to the actual operation of the device let us recall the constructional and doping details of an NPN transistor. Here the emitter region is wider and very heavily doped. Hence the concentration of majority carriers (free electrons) in this region of the transistor is very high.
The base region, on the other hand, is very thin it is in the range of few micrometers whereas emitter and collector region are in the range of millimeter. The doping of the middle p-type layer is very low, and as a result, there is a very tiny number of holes present in this region. The collector region is wider as we already told and doping here is a moderate and hence moderate number of free electrons present in this region.
The entire voltage applied between emitter and collector is dropped at two places. One is at the forward barrier potential across the emitter-base junction and this is about 0.7 volt in case of silicon made transistors. The rest portion of the applied voltage is dropped as a reverse barrier across the base-collector junction.
Whatever may be the voltage across the device the forward barrier potential across emitter-base junction always remains 0.7 volts and the rest of the source voltage is dropped across the base-collector junction as reverse barrier potential.
That means none of the collector voltage can overcome the forward barrier potential. Hence ideally none of the free electrons in the emitter region can cross the forward barrier potential and can come to the base region. As a result of the transistor will behave as an off switch.
Thank You for watching
டிரான்சிஸ்டர் எப்படி வேலை செய்கிறது என்பதை இவ்வளவு தெளிவாக இதுவரை யாரும் சொல்லி நான் கேட்டது இல்லை. மிக மிக தெளிவான விளக்கம். தமிழ் மாணவர்களும் எளிதாக எலக்ட்ரானிக்ஸ் கற்று கொள்ள உதவும் உங்கள் பணி சிறக்க வாழ்த்துகள் ஐயா.நீங்கள் நீடுடி வாழ்க பல்லாண்டு.
Sir enga irukinga.... Cha neengalam deivam.... Idhan da transistor... Avlodhan.... Ungaluku salute you are the general Commander.. 🤠🤠🤠
Great explanation sir... If I was able to get a teacher like you in my past college days, I could have reached greater heights sir... But it's ok.. Better late than never... keep up this good work sir ❤
P
ஆசானுக்கு வணக்கம் நல்ல விளக்கத்திற்கு நன்றி ஐயா
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அற்புதமான விளக்கம் குருவே..
நெஞ்சை நக்கி பதிவு
ஆக சிறந்த முற்றிலும் புரிந்து கொள்ள கூடிய விளக்கம் ஐயா, , well explained about that positive and negative sign, and how related with forward and reverse bios , arumai arumai
இன்னொரு முறை பிறந்தால் உங்கள் மாணவனாய் இருக்க ஆசை
அனைத்தும் அருமை. தாங்கள் கரும்பலகையில் எழுதுவதை கொஞ்சம் நெருக்கமாக காண்பித்தால் இன்னும் அழகாக தெரியும் , புரியும்.ஆசிரியருக்கு நன்றி.
What is the purpose of transformers
@@sadasivampachamuthu632there are many types of transformer.centre tapped transformer,step up(to increase the voltage it is used in power plant),step down (to decrease the voltage.for example:mobilecharger) and so on
@arumugav😅😅ellaksmananan9095
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Glad that I found this video. Helped a lot. Thank you so much sir❤
Dear sir.
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sir lectures very good theory completely useful for gate preparation
Warm Greetings Sir !
I wish to thank you for this video clip about NPN & PNP transistor. I had watched many videos about NPN & PNP transistor but I could not understand the proper functions and symbol of these transistors hence I am Art student. Your explanation made me to understand the different between the PNP & NPN and its functions.
Thank you
KEEP GOOD WORK
மிக அருமையான விளக்கம் ஐயா
Neengala engaluku oadikkum pothu illathatha nenacha i feel so bad.. U r d best...
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Thank you soo much sir....very helpful for my sem exam🙏🙏🙏
super sir, crystal clear explanation, keep educating our tamil students to reach their goals in life, not all colleges teach like thi simple and logically as easy to understand to any mind.
sirantha vilakkam .from sri lanka
Your teaching is very useful
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I end the vedio with whole heartly
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Your really super hero Sir for eee,ece and ame
sir thank you so much , but the emitter is reverse biased in your explanation.. it is correct
Excellent sir.You r explaining nicely sir
Extraordinary explanation sir
Thank you so much sir. Very clearly iam understand , thanks 🙏🙏🙏.
Please can you explain more about current direction, is electron and current direction are same with respect to battery positive terminal?
Great Explanation.. If I would have got a teacher like you, I would have entered into electronics field for sure. Now I am in computer field. After 30 yrs of my ECE graduation, first time seeing a very good teacher (YOU) giving clear explanation.. Thanks a ton. Keep up the good work!!
Very good explanation sir🎉🎉🎉🎉🎉🎉
Good teaching sir
Very easy to understand the topic
Sir but last diagram la veb and vcb both are in reverse bias sir but you told veb must in forward bias sir can you pls explain me sir
How r u methagu arumainathan sir i'am ur old student sir, now working Saudi ur blessing.
Are we have this concept in Ece or not
Sir if I am not wrong , current goes from collector to emitter in NPN right? To my understanding, Electrons travels from emitter to collector ?
Great teaching sir.
What a explanation sir 👌 really it easyli understand....great job sir🙏
Good teaching sir! thankyou ❤️ keep going and post more video.
very nice and super sir epdi sir nega kathukitiga yagalu ku ugala la engg na ena nu purujuruku
Excellent explanation of active devices better than American and British lecturers. Kudos
Sir, In voltage and current video, you explained that point with higher potential(more electrons) is considered '+' and with lower potential(lesser electrons) is considered '-' and electrons flows from positive to negative. But here in forward bias, electrons flows from emitter negative to base positive.. How? Am i getting it wrong? Thanks for making this video! Gives a lot of excitement in understanding these concepts.
electrons will always flow from negative to postive. since negative terminal contains more electrons. athigama irukkura eddathulla irunthu kammiya irukkura eduthukku pogum. Conventional current ( reality appdi illa - we refer current as flow of elctrons) will flow from positive to negative. so positive terminal ah high potential num, then negative terminal ah low potential num solluvanga. same charges repel each other so in negative terminal electrons are pushed away (due to repulsion - same charge), in postive terminal they are attracted. Hope it helps :)
Sir your explanation is good and simple,but small doubt, we can trigger a npn transistor just by applying positive voltage to base, why all people generally apply a negative voltage too in diagram for reverse bias. Even without Giving negative to base the transistor works in reality can you explain the difference in comments please.... This point confuses us...
Can you please clear this doubt in a video or in a comment section please...
really nice explain
great explantion sir
Awesome sir... Big Respect
i feel like physics topper thank you soooooooooo much sir
Sir collector and base thana sir reverse voltage apply pannanum aana collector and emitter kku reverse voltage kudukkuringa ithu epdi sir ?
All the best sir 🎉❤
Excellent explain sir ....👍👍👍👍
Sir positive la irunthu thane sir electrons poogum nu sonni ga...then y.emitter is connected to negative
Love you sir. Solla vaarthaikal illai
Tq for ur explanation sir
Thank you so much sir 🎉💯👌
Very nice sir
Sir at (18:14) collector base or collector diode yapdi sir reverse base ?
And emmiter base or emmiter diode yapdi sir forward bias?
it should be like this one right CB=Forward bias and EB = reverse bias tane????? Pls answer me it's completely confusing me!!!!
it's totally worng according to your teaching in the initial stage of THIS VIDEO!
Good explanation I like it 😌✨
IGBT topic podunga pls
17:35 please clarify that switch closing concept are mentioned NPN ? if NPN means +ve how you supply to emitter in NPN method ?
Good explanation sir. thank u
Sir, Can you show me the saturated voltage of a transistor practically?
Sir pleas take more videos this subject 😫🙏🙏💓😫🙏🙏💓😫🙏🙏💓.
Super explanation sir
Bipolar junction it is the answer for that??
Nandri ayya
Good explanation sir
Sir...Output chara of CE Config is between Ic and Vce, not Vcb. Right??
Super class sir
But schematic diagram la common emitter circuit potrukiga sir, top la common base potrukiga sir
Arumai
What is happening inside the transistor ? Just movement of electrons and holes ?...
Thank you sir ❤❤
Transistor bias resistor calculation please thank you sir ❤️❤️❤️❤️❤️
Sir 11 physics video poduga sir
@@kamatchisubramani4843 only related to eee thaan sir post pannuvaaru!
Good teaching and your pronunciation was super but only problem is your writing style is very small ...am not able understand the words ....other wise you are genius in teaching....valthukal sir,
Sir, could you explain elaborately how triple voltage multiplier circuit works ? This circuit is used in mosquito bats.
How RPM control works? Please explain with clear diagram sir
Negative side la errunthu current poguma. Make clear he mark like that
Thank you very much sir
Here, is
knee voltage - forward bias
Breakdown voltage - revers bias
Sir, I want more maths videos
Really super sir
Sir oru yemergency light bord thayarakana video cheyumo swantham ayi padipikumo
Thanks sir 🙏🙏🙏🙏
16:40 How Emitter is positive sir?...kindly clarify my doubt sir
Super sir
Sir basic electronics part 5 enna topic sir nanu neraya thedi pathutae antha vedio mattu illa ... Sir electronics la part one la irunthu step step ah podunga ethu enga iruku nae theriyala ungaloda vedio la tha exam ku padikurae so aduthu aduthu iruntha padika help ah irukum pls sir
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Tq
Thanku
nice
sir ECE 2nd semester lessons lam upload pannunga sir please.....onnume puriyamatakku sir
Current flowa maari eluthi viddeeerkal
Good...
Thanks sir 💙
நன்றி
Sir CT/ PT difference