Bipolar Junction Transistors - Common Emitter Amplifier

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This electronics video tutorial provides a basic introduction into the common emitter amplifier which uses a NPN bipolar junction transistor. This video explains how to calculate the voltage gain, current gain, and power gain of the CE amplifier circuit.
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30 мар 2020

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Комментарии : 222

@TheOrganicChemistryTutor 5 месяцев назад

Final Exams and Video Playlists: www.video-tutor.net/

@vbacz 5 месяцев назад

Nice ma goat

@butchness6980 Год назад

it is actually crazy how well he can explain things compared to my EE professors.

@TraaaaaasshBooooaaaatttt Год назад

professors tend to assume your understanding is on par with theirs

@gracenownby Год назад

@@TraaaaaasshBooooaaaatttt it's just hard for people to understand what you're struggling with sometimes. Once you understand a subject in EE it's generally not so hard I think. But yeah I find that's a common sentiment among people, especially at university, they are trying to explain their understanding of something. Which is often way above my head hahaha

@eren_yeager9927 7 месяцев назад

@@tajalemark8256 ???

@mackb996yt3 7 месяцев назад

@@tajalemark8256no I am studying eee which includes electrical (80℅) and electronics (20%) I still identify as electrical engineering but extra knowledge.

@oskarjennische2490 6 месяцев назад

@@tajalemark8256obviously much of it is same shit. Even industrial economy does a basics course in EE on my university

@elaindickson3400 4 года назад

You are one of the best teachers that I have come across Sir. Your clarity and delivery is phenomenal on every level. As an Electrician, I have learnt a lot more about electronic components and their calculation. I am not contented being an Electrician but an Instrument Technician as well. Many thanks to you Sir. You have helped me alone this journey. Keep up the good work you are doing. May God continue to bless you and keep you safe always.

@deepitpatil 4 года назад

Please never stop making videos. Your videos have helped solo many people including me. They are to the point and perfect!

@Kent-vq5qb 4 года назад

Man, you are the best teacher in the world. Your Calculus and Physics videos saved my college life. I do not even go to lessons. Because you teach better than my prosfessors. Thank you very much sir.

@mattkan3275 3 года назад

amazing

@PunmasterSTP 2 года назад

How’d the rest of college go, or are you still studying?

@allinoner 3 года назад

Thank you so much. I’ve been looking for a video explaining how class A/B/AB audio amplifiers work and every video just tells you you have a transistor, you have a cap, you have some resistors and that’s it. I’ve been looking for someone to explain to me what happens to the electricity exactly from the input to the output. What every component does to it and I finally found you. Thank you sir.

@maleenh1738 3 года назад

Greatest tutor ever ...Loved your work always...helped me a lot since AL to now on my Higher studies as well as..Thank you so much sir

@gasperh.9800 3 года назад

you taught me as much as my teacher in 4 months of online school

@kelloginc1 3 года назад

Same

@yuvrajstylesssthunderbolt1882 2 года назад

Extremely true ✨️👍🏻

@sketchmusic9434 Год назад

😂😂😂😂

@kanayamaharaj1446 4 года назад

You are legit the only reason i pass math and thanks to you i can help my friends.

@strotter5795 Месяц назад

I want to say "thank you" for this video. I've been trying to learn some of this stuff as a hobby, but I've gotten nowhere because most people posting content assume that anyone watching these vids must be in possession of a baseline knowledge of electronics that I don't have. I've found the search for said knowledge is curiously difficult. It's been frustrating. This video was knowledgeable and informative. So many 'aha!' moments.

@smportis 2 года назад

Though I was a computer engineer major in college, and am currently studying for a ham radio exam, circuits are still a mystery to me. This has helped get a glimpse into all the very high level ham radio circuit theory where we are just essentially memorizing a little theory and a lot of answers to questions that will be asked verbatim on the exam (50 questions from a pool of 600). I still marvel at the fact that people have discovered putting capacitors at C1 and C2 will filter out DC signal, and that Re controls the E voltage... (and all else about circuits). Thanks for this work. Much appreciated

@PunmasterSTP 2 года назад

I felt the exact same way, and I also took the first two ham radio tests a long time ago. I definitely remember the theory and memorization!

@smportis 2 года назад

@@PunmasterSTP passed the General and extra exams yesterday!

@PunmasterSTP 2 года назад

@@smportis That's awesome; congrats!

@smportis 2 года назад

@@PunmasterSTP thanks man.

@RexxSchneider 2 года назад

Unfortunately, Re doesn't control the emitter voltage. That's simply around 0.65V below the base voltage, which is controlled by the base bias resistors.

@flapajawea Год назад

This guy does everything, thank you so much 🙏

@sangeetasang9437 Год назад

You are one of the best teacher. Thank you for educating lakhs like me. God bless you with more knowledge.

@chasingfairies67 4 года назад

you are a legend!!!! literally saved me from failing😭 your explanations are so clear and easy to understand💛 my professer just does not make sense at all and made everything sounds suPER complicated. THANK YOUUUUUU!!!

@marccowan3585 4 года назад

What are you talking about, this guy doesn't teach you anything, any real exam would expect you to solve for the output voltage and current, not just give it to you

@z3nkin 3 года назад

@@marccowan3585 hi teach!

@kieranstorrie9361 3 года назад

@@marccowan3585 You're a mug mate haha

@PunmasterSTP 2 года назад

@@marccowan3585 At the end of the day it’s free content. And if someone just watches videos, doesn’t think critically about things, and doesn’t try solving problems or building circuits on their own, then I think it’s more on them. Personally I find his videos very interesting and enlightening.

@mohammadurgur953 4 года назад

I watched MANY tutorials, you are GOOD.

@virajgoyanka5150 3 года назад

GOD*

@indigenousone8020 4 года назад

This is very helpful thank you

@PunmasterSTP 2 года назад

NPN? More like “On you I can depend!”, because these videos are amazing. Thanks so much for making and sharing them!

@thething6936 2 года назад

never seen a pun be forced this much lol

@PunmasterSTP 2 года назад

@@thething6936 I would imagine so, and I find trying to force them kind of fun! Btw, if you're up for more: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KHDBT4IWldg.html

@mattkan3275 3 года назад

You teach very well, thank you

@tefomaleke2879 2 года назад

Thank you so Much Sir......please never stop making videos. They're beneficial to Many of us

@steveo44 2 месяца назад

Amazing explanation. Your a stellar teacher

@lavenderbex 4 года назад

I’m watching is video not even knowing what any of this stuff is just bc I like the sound of your voice😁

@shahadat_955 3 года назад

Ha, ha

@s.sradon9782 3 года назад

Imagine the things you could be doing in that time.

@Yanga_Thami 3 года назад

🤣🤣🤣🤣🤣🤣🤣

@angelyn6277 3 года назад

Lol i like the sound of his voice too

@s.sradon9782 3 года назад

@@angelyn6277 so am I the only one who actually needs this for day to day life?

@markseidel19 3 года назад

A nice and simple short video explaining more than a lecture.......

@taliahpillay6362 3 года назад

Bro you're a life saver

@TheEtbetween 8 месяцев назад

Wow!! You Explain that Really Good! Excellent Job!

@iwishifiwasaneconomicsnerd9648 4 года назад

hope you are having a great day

@asteroid626 3 года назад

I have enjoyed the lesson. Thanks very much sir

@yourboichlorine 3 года назад

there is no way all of his content are things that I am taking this semester

@helan311 2 года назад

literally

@caimccray7 Год назад

You mean every semester for the rest of your college experience? This guy knows everything 😂

@tamarabarnett9869 Год назад

Great tutorial .Thanks.

@diagorasofmel0s 3 года назад

so i took a whole designing course in my 3rd semester and didn't learn this much as i did in these 11 minutes

@mrpedrobraga 3 года назад

I'm currently in my class, what i did was join in and mute it to watch this

@PunmasterSTP 2 года назад

I feel like the educational value of a resource is inversely proportional to its size a lot of times…

@videobyandrew Год назад

Man I forgot about this channel. ORGANIC CHEM TUTOR FTW

@trapmusicnation7471 4 года назад

Thank you so much

@Bianchi77 Год назад

Nice video, thank you for sharing :)

@hamad9218 3 года назад

Thank you very helpful

@robertlinder6414 7 месяцев назад

Flashback to High school electronics shop.

@helloworld252 3 года назад

Nice sir it is easy to understand

@kshitiz41 4 месяца назад

As I am an electrical student not electronics, so very well explained thank u🤞

@prabodhagamage6787 3 года назад

Thank you so much sir ✨🥺❤️

@akhilarya7517 3 года назад

Good Video Mr Tutor :)

@sexybeastvloger4925 Год назад

If only if RU-vid already exist during my college day i may not failed multiple time on this course, RU-vid is a better teacher for a slow learner like me.

@Masterlewger 3 года назад

Thank you!!!! Tomorrow I have a test on these, and they still havent send us the books. You just saved me, thank you !!

@PunmasterSTP 2 года назад

How did the test go?

@imSurajsingh24 2 года назад

Good explanation 👍

@kabandajamir9844 2 года назад

The world's best teacher

@alexandrachiritescu5352 26 дней назад

If only my electronics professor explained everything like this...

@kelvinbyabato 4 месяца назад

easy to swallow! good work!

@anjelyjoseph3865 3 года назад

You are awesome man!greatest teacher of all times I give ya that.you have all my respect

@melissarainchild 4 года назад

Yikes! Where were you when I was into electronics (at the age of twelve)...I would have grasped it! Thanks for awakening an old passion of mine

@PunmasterSTP 2 года назад

I feel exactly the same way.

@AGUCHIBUEZE-dp3id 7 месяцев назад

I am not yet an electrical Engineering student. I'm still about to enter university and yet I understand electronics. Thanks to this channel

@justinetheewordgiver1197 3 года назад

I love your tutorials I have crammed your hand writing

@utopiatube2882 2 года назад

I love it bro u are smart enogh!

@cheesepie4ever 4 года назад

Thank you for these videos it is very useful for my Electronic engineering course

@PunmasterSTP 2 года назад

How did the course go?

@cheesepie4ever 2 года назад

@@PunmasterSTP I'm just going into my third year now it's going well so far

@PunmasterSTP 2 года назад

@@cheesepie4ever Awesome, I am glad to hear it! I did biomedical engineering, but with a concentration that was basically EE. Have you encountered microcontrollers yet?

@cheesepie4ever 2 года назад

@@PunmasterSTP yeahh absolutely, microcontroller stuff is some of my favourite

@PunmasterSTP 2 года назад

@@cheesepie4ever I'm glad to hear it! I can't quite recall if this is the same microcontroller I used in college, but based on my college's site, I think it was the Texas Instruments TM4C123. What do you use?

@jaretw4293 4 года назад

How are you following my electrical engineering courses exactly with these new videos! We just learned CE BJT Amp this week, thank you!!!

@jaretw4293 4 года назад

More of these videos please!

@PunmasterSTP 2 года назад

@@jaretw4293 AMPsolutely!

@videosofeverything3876 2 года назад

You are great

@aqeelshah5801 4 года назад

Hi man Love You 💕 From Pakistan 🇵🇰🇵🇰

@echimadrian2007 2 года назад

Awesome video. Thank you! How can we calculate resistors, and maybe the caps, based on input and output V / I and transistor specs? I am thinking to do one for my headphones, to amplify from phone.

@demetriusdemarcusbartholom8063 2 года назад

Thanks

@nyakabb2472 3 месяца назад

Wish l could have an option of liking this like a hundred times 🎉

@user-ys5qj6xr2j 10 месяцев назад

我年輕時可沒有人這樣講解。

@yavuz6X 7 месяцев назад

You just watch the whole video for say that ?

@gdogg4002 4 года назад

Where were you when I needed you!?

@avrillindo5830 4 года назад

Sir how to bias class ab transistor amplifier?and the loadline of it

@josephburton92 2 года назад

Easy way I remember how to decipher them. NPN (Never points N) PNP (Points N Permanently)

@MezGaming-zp5ei 4 месяца назад

I can feel this will come in my exam.....

@Ojackbauer0 3 года назад

To represent the 180 degree phase shift of the outputting signal the gain should be negative.

@doyoarero5599 4 года назад

God save you! Sir

@abinashpal1151 3 года назад

How find the value of r1 r2 re and cc ce for a given gain and beta value

@zhylerliebesleid9771 3 года назад

In voltage divider bias. with npn transistor. what will happen to the value of voltage gain when there is collector resistor? Can anyone care to teach me?

@fatimaalbaghdadi9225 3 года назад

كفوووووو منكككككككككك 🤚🏿😭😂♥️♥️♥️

@DeadlockNeo 2 года назад

Is it possible to make a bandpass filter using this circuit?

@Kevin_F92 2 месяца назад

Can anyone explain how the capacitors allow the a.c input signal while blocking the d.c power supply at the same time? I dont understand that

@Combat4Life 4 года назад

Do a relative displacement video (math)!!!!!

@firdauspuzi1145 3 года назад

i love you

@adreq3.05 Год назад

All depends to individual parametres of transistors types. But how to solve the value resistance of dimmers? It should to add that collector voltage is equall to supply voltage, circa about the half Vcc

@youtuuba 2 года назад

Good video as far as it went, but it included nothing about the logical questions a student might well ask, such as 'why is that resistor divider there on the input, and what are the functions of the collector and emitter resistors'? Some mention could have been made about selecting resistors to place the transistor's response in the middle of its most linear gain curve, etc. A bit of dialog about the actual way the transistor in this circuit is modulating the output voltage, since the output signal does not pass through the transistor. Things like that......

@AndrewKiethBoggs 10 месяцев назад

Hi Youtuuba! Check out his other video on voltage divider biasing. Essentially, there are many ways to bias amplifier circuits and one of them is using a voltage divider. This helps with changes in Beta due to things like temperature effects. He does a great job explaining in that video, it is just for DC analysis and stability.

@kelvinmogaka5978 2 года назад

Representing EGERTON UNIVERSITY 🇰🇪

@chibuikeokwuosa2955 2 года назад

Can we get a video on FET please

@eggxecution 10 месяцев назад

Note: if common emitter amplifier doesn't have bypass capacitor: Av = vout/vin whereas if it has a bypass capacitor its formula is Av = Rc / re where re = Vt/Ie . The common constant threshold voltage value used for Vt = 25mV at 300kelvin

@nutskok5394 8 месяцев назад

This is very important I don’t know why he didn’t mention it

@kjmtanta6769 3 года назад

Appreciate your gift sir, you lecture well. However, I have a question. If the circuit is designed in such a way that DC is blocked from both the input and the output, then why include it in the first place? In other words, why is the transistor circuit subjected to both AC and DC?

@PunmasterSTP 2 года назад

I think part of the reason is that the transistor has to be biased (with DC) appropriately.

@GogiRegion 2 года назад

@@PunmasterSTP Correct. You use the DC in order to compensate for the bias so that small AC signals are able to get past the bias. If output is “O = beta * AC - B” you add a DC voltage to compensate for B so that the output is “O = beta * AC” and the output will be more accurate to a perfectly amplified AC signal.

@PunmasterSTP 2 года назад

@@GogiRegion Thank you for providing that insight!

@ainmiky4620 3 года назад

I'm confused why there are capacitors and AC input in this circuit. Do we have to have them for us to make a Common Emitter Amplifier?? I learned about Capacitors and AC inputs but I want to dive a little bit deeper as to why they are used here because I don't understand it.

@PunmasterSTP 2 года назад

I think the capacitors are there because we want to block out DC signals and just amplify AC (or changing) signals. Also, the transistor still needs to be (DC) biased appropriately, which also requires the use of the capacitors.

@matthiaslivai606 Год назад

im an mechanical engineering student but need to learn about this as well smh

@lagunacorona Год назад

How can I find a vcc from rc and re?

@harunichambo4658 4 месяца назад

💥💥💥

@Muthu__Kumar Год назад

How to calculate R1,R2,RC,Re,cc,ce to design an audio amplifier

@aswathik4709 2 года назад

when you draw the symbol of transistors, the two terminals of collector and emitter shouldn't intersect at the base terminal. There should be some space in between them. Otherwise it would mean there are only 2 regions.

@Yusukess 2 года назад

that is only for MOSFET's the little gap is in between the gate and the drain/source

@georgezayer2934 10 месяцев назад

Definitely there is a small gap but unfortunately he could have increased the gap...It is just draft and it is a good draft ...love it ...The fact it is not connected.. Well done..

@gemsthkchm5356 4 года назад

Dear Sir, please make video separately focussing on indian books(cbse). There are millions of people every year preparing for NEET and JEE.i think you will get lot of views particularly from india. Your teaching are so constructive unlike other, i use to note down every word you speak which is very helpful to me. I really appreciate your teaching and it's all because of you now that I'm ready for NEET exam which is to be held in the month of May. I have watched all your video's of chemistry and physics. Thank you so much. May God give you showers of blessing 😊.

@aqeelshah5801 4 года назад

Yes you are right bro. I am from Pakistan but I loves indian NEET and JEE. Preparing these competitive tests are really helpful for understanding physics , Mathes and chemistry deeply.

@gemsthkchm5356 4 года назад

Who it will be other than Our Lord Jesus Christ.

@oc3fathimanuha555 3 года назад

Gems thkchm did u pass yr neet?

@rayanjaved6264 7 месяцев назад

did you clear NEET?

@ma5tv393 2 года назад

How to calculate resister and capacitor value

@ShennyChosenOne Месяц назад

Isn’t P equal to U times I^2?

@modex20 Год назад

The assignment of V input as 10 mV is fine. But the arbitrary assignment of one milliamp input is confusing. How does one determine the value in a real world application?

@user-wq8ke7rv5d 4 года назад

: Function F=(10/(sinx.cosx+z²))¼ Point P=(1,2,3) direction a=i+3j+2k

@PunmasterSTP 2 года назад

Where did that come from?

@markmusicman Год назад

Wouldn't the input power by 10uW , I got confused at this point. 10mV x 1mA = 10uW Am I missing something?

@eyalovadya2562 Год назад

10uW = 0.01mW

@donakilasadhanjana8885 3 года назад

is Beta is a constant or it can be vairy?

@PunmasterSTP 2 года назад

I think it’s mostly constant for any given type of transistor, however it can change with temperature and perhaps other things.

@RexxSchneider 2 года назад

It does change somewhat with temperature, but changes most with collector current. For any given transistor type, there will be a collector current where it is a maximum. Below and above that current, it can drop, sometimes by a factor of as much as 3. The best way to get familiar with this is to search for transistor datasheets for different transistor types and look at the figures provided for current gain. Perhaps look at 2N2222, 2N3904, BC547C and 2N3055 to get an idea of the range of beta you may encounter.

@Acesushii 3 года назад

I am hearing abacus O.o You're using abacus as calcu ???

@lambsauces 3 года назад

yeah

@Bethsy644 2 года назад

What would happen if Cb were shorted?

@SheikhN-bible-syndrome Год назад

What I don't understand is how can a transistor pull 5 or more amps of power with a resister on every leg and I know these resisters can't handle 5a of power

@yosht6110 3 месяца назад

me at 4:36 - ah that's simple, I think I got this me at 4:37 - wha-

@kumarshresth7511 2 года назад

U all we will be surprised to know that Transistor as an amplifier is taught in high school in India

@Recylops 3 года назад

what actually determines beta? is it something external to the transistor or is it some inherent quality of the transistor itself?

@PunmasterSTP 2 года назад

I thought it was inherent. I think he has mentioned several times that beta values range from around 100 to 200 (IIRC) for a bipolar junction transistor (BJT).

@RexxSchneider 2 года назад

The beta of a transistor is determined by the way the transistor is manufactured and is completely inherent in the transistor type. A modern small-signal transistor might have a beta as high as 800, while an older transistor. or a power transistor might have a beta as low as 20. It also will vary somewhat with the collector current that is being used, so you should check on the datasheet for the transistor you are using for its possible range. For example, if you search for "2N2222 datasheet", you'll find a section labelled "DC Current Gain", you'll see that its minimum guaranteed beta is 35 at Ic=0.1mA; 100 at Ic=150mA; and 40 at Ic=500mA. You'd normally be using it as an amplifier with a collector current of a few mA and would probably design for a worst-case beta of 50.

@alihasafdar8256 2 года назад

Is Vce=vbe ???

@grzesiek1x 2 года назад

7:25 how is this possible that it is only 1 mV ? Is this an average or what ? If it is AC it is 1 mV and - 1mV so I don't get what you wrote there :/

@RexxSchneider 2 года назад

You are quite right to query this. When you see an ac voltage stated as "1mV", you have to guess what is meant, because it can be ambiguous. It almost certainly should mean an _amplitude_ of 1mV (i.e. a sine wave varying from +1mV to -1mV), but it might be a voltage of 1mV root-mean-square (rms), which varies from +1.41mV to -1.41mV. The writer might even have intended it to mean 1mV peak-to-peak (p-p or pk-pk), which varies from +0.5mV to -0.5mV. My advice is to assume the first if you have to make a guess, and to always make sure you add "rms" or "pk-pk" if you are working with voltages measured in that way.