Voltage Divider Bias Circuit

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This electronics video tutorial explains how to solve the voltage divider bias circuit. It explains how to use a formula to quickly calculate the base current of the NPN transistor and how to calculate the emitter and collector currents as well as calculating the emitter and collector voltages Ve, Vc, as well as Vb and Vce.
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Опубликовано:

25 июл 2024

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Комментарии : 97

@TheOrganicChemistryTutor 6 месяцев назад

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

@sweetmendoza3425 4 года назад

I just wanted to say thank you so much for these videos I know personally they are helping me immensely and I just want to thank you for sharing it with everyone out there and for all of your time to explain and to break it down and it's just it's a blessing I appreciate it

@PunmasterSTP 2 года назад

Perhaps I'm biased, but I think these videos are some of the best on RU-vid. Keep up the amazing work!

@ayrtoncassar7300 2 года назад

nice pun this should have way more likes

@PunmasterSTP 2 года назад

@@ayrtoncassar7300 That is quite kind of you to say, and usually my puns are pretty terrible. Incidentally, in case you'd be interested... ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KHDBT4IWldg.html

@chumambiko4026 Год назад

Biased😂

@PunmasterSTP Год назад

@@chumambiko4026 I'm just glad anytime someone gets a charge from one of my puns.

@trendswithjotham Год назад

😂

@trelligan42 4 года назад

Just a comment to feed the YT algorithm. Excellent review for those of us who used to work on this stuff.

@seandempsey4507 3 года назад

I've gotta say you have carried me through school and now university so thankyou!!

@arindambala6079 2 года назад

All your videos about electrical and electronics are the best videos for learning the basics... Its not an animation its just a study in a retro style.. watching your videos and use my own note book like old school learning. Thank you so much Sir.

@dennisgonya4500 3 года назад

This is a great piece showing Thevenin's equivalent and the biasing of a transistor. I am taking Cleveland Institute of Electronics Advanced Engineering Course and will add this to the transistor books. I will teach this is Asia. I was a staff engineer/scientist at IBM with patents and recognize the great work that you have shown here. Great job.

@billyd1045 2 года назад

Very good explanation. +1 after beta was always omitted when I did this 40 odd years ago at college due to it being negligable. Well done!

@kumargoldking5185 3 года назад

Thank you!!! In every tutorial finally give an explain application of that circuits, that is very useful for students and circuit builders, most of college or institutes not teaching and not telling wherever we can practically use, so i am asking... thank you once again.... for you great tutor

@sagharzahedi7414 4 года назад

U literally the only tutoring RU-vidr that i can understand

@realmccoy813 Год назад

😆😆

@tobyflenderson6972 Год назад

Yeah, most of them have such strong paccents

@alohahoward1 3 года назад

Your videos are invaluable. Thanks so much.

@AJ-et3vf 3 года назад

Amazing tutorial! Thank you!

@rishiladdha Год назад

Thank you so much. PS: Would love it if you could organise your content in topic wise playlists. That'll amplify how useful they are :)

@maxhardin6469 Год назад

‏‪4:08‬‏ ‏‪

@avishka-don 3 года назад

You are amazing! I actually understand this now!

@jayeannetionetteabugan7162 2 года назад

IF ONLY I COULD TREAT THIS MAN AS A SIGN OF GRATITUDE. THANK YOU FOR YOUR VIDS MAN!

@corruptofficial7794 Год назад

Hi there, it's perfect explanation how to calculate parameters in a transistor circuit. Thank you.

@Yanga_Thami 3 года назад

thank you i passed my Tutorials through this Video

@menachemporter5367 4 года назад

Your videos are the best. Can you please add signal voltage and current gain calculations?

@user-ru9sp5jp3d 3 года назад

why Vb is not the voltage divider between r1 and r2 ?

@BumbleCore 3 года назад

Life-saver equation!!!

@wileyreeves791 3 года назад

Fantastic video

@eervay 3 года назад

Excellent toutor

@re.liable 4 года назад

I've been trying to solve this without find the Thevenin equivalent as was done in the video. Using KVL in the "finding the I_B" stage, I initially used: V_CC = I_1R_1 + V_BE + I_ER_E and from that have gotten as far as: I_B = (V_CC(R_2/(R_1 + R_2)) - V_BE) / ((β + 1) R_E) It's basically the same as the one that was used in the video, however I am missing a term in the denominator which is the equivalent parallel resistance between R_1 and R_2. Can someone try to point out how I could fit that in this equation? I feel like I should have included it in the initial KVL equation I used, but I don't know where (and how) it should go. EDIT: After searching a bit, I realize that the equation should've been: V_CC = I_1R_1 + I_BR_B + V_BE + I_ER_E R_B is the parallel resistance I'm missing. However, I'm still struggling to intuitively think of the *existence* of R_B along that path.

@Ceyhus 3 года назад

Big thanks great master! )

@learn_with_md Год назад

Thank you very much sir ❤

@myintnaing2470 Год назад

Great. Explaination.

@namename8986 Год назад

great video thanks a lot

@abdoelkady9974 3 года назад

Firstly thank you for the great tutorial secondly if we calculated the half of Ic saturation it won't equal Ic of this circuit so does that mean it ain't a midpoint biased circuit or is it that my calculations are wrong or is there some other thing i don't know ?

@maurice_mores 12 дней назад

I cannot thank you enough!!

@asitha2965 11 месяцев назад

thank you sir

@harismasoom6634 3 года назад

Thanks...sir...🧡

@coltr1 11 месяцев назад

This shit made no sense on my FE practice exam, thank you for the explanation.

@Tanya-eg8cd 4 года назад

Hello. are your playlist organized? like the first video is lesson 1 and the next video is lesson 2 like that

@lolamsonam2315 3 года назад

Good

@danieldomo2441 3 года назад

I'm looking for your video about FET

@robertlinder6414 6 месяцев назад

Flashback to high school electronics , I took 3 years of electronics with certification.

@bae4993 4 года назад

Hello, thank you for all the videos. Can you do a video on neighbouring group participation (NGP) in organic chemistry or send me a link if you have, can't find it thank you!!!!!

@nifwanarbinugroho8898 3 года назад

0:19 epic rap moment

@scottbender7354 3 года назад

Going the route of solving for VB with thevenin, then solving for VE using difference between base and emitter voltage, then using the drop over the emitter resistor to solve for emitter current, then finally solving for IB and IC using beta relations will get you a vastly different answer. Why is that?

@scottbender7354 3 года назад

I believe transistors are actually non-linear devices, so thevenin's theorem would not be applicable here.

@jomarescobido9314 3 года назад

Sir can you explain, when to use 0.6 or 0.7 when assuming value of Vbe. Thanks

@kvothe1404 3 года назад

It depends on the transistor that you used

@santo213a 3 года назад

Does anyone know what to do if you don't have the value for R2?

@almoglavi8737 3 года назад

but how do i found the Ic(max) here? for example in circuit with 1 Rb, Ic(max) = Vcc / Rc. can anyone help?

Год назад

How can I calc the resistor values??? Thx

@lucky-zt8nm 2 года назад

How can you apply Voltage division rule if the exists a base current Please reply 🙏

@eggxecution 10 месяцев назад

Personal notes: in voltage divider bias circuit Ve = Ie*Re Ie = Ic if Rth < (1+B)Re if it is not, use Ie = Ib + Ic also learned where Vb, Vc, Ve are positioned

@rodonte434 4 года назад

I need help. Can you solve when R1 is 180k, R2 is 60k, Rc is 14k and Re is 7k while HFE is 194

@landerclaridad3713 Год назад

Hello , how can i find my beta value in a BC547 Transistor?? i mean what is the value of beta if the transistor i used is BC547? Thankyou!!!

@MohannedHOS 2 месяца назад

If we have VCC on top and VEE bottom what will Vth be?

@Mrpaul1975 5 месяцев назад

Can we able to drive a 7812 ic from a 200 volt DC supply using voltage divider rule?

@delivahit160 Год назад

Helal olsun KRALLL KING

@CMINOR27 6 месяцев назад

i dedicate my engineering degree to you Sir Organic Chemistry tutor

@victord3867 3 года назад

Something i never got. How do you derive the product over sum rule? Like, why can you only use 2 resistors for that?

@PunmasterSTP 2 года назад

Think about what happens at the nodes where two transistors are in parallel. How are the currents and voltages related? Try to use Ohm's law and Kirchhoff's current law to find the total current across both resistors, and then the equivalent resistance would be R_equivalent = V/I_total.

@Humble_Karaguy 2 года назад

Please what is Rb and how it's calculated

@joshuaflores8648 2 года назад

is beta just the current through the IB resistor? 19 min

@elemvill 4 года назад

Idol. Pa shout po sa next upload mo.

@victimovtalent6036 Год назад

My headdd🤯

@edwardbatista7920 Год назад

is Vth and Vb the same voltage? and if not, what is the difference?

@Joeblowesixnine Год назад

How do you find the collector current if you're not given the beta value?

@brandonfd789 11 месяцев назад

Either find the beta of the transistor with a data sheet or calculate it, I cannot remember the specific formula for that.

@xXxserenityxXx 3 года назад

You beautiful human. :D

@oakspines7171 5 месяцев назад

So, in the vase VE= 0, ib = 0 then ?

@judeoludunmade837 Год назад

I got a minus value for Ib when i used the formula

@larryjamescairo3138 3 года назад

How to compute it?

@PunmasterSTP 2 года назад

How to compute what?

@drogo2673 4 месяца назад

At 3:48 for the (B+1) should it not be 200+1 rather than (20+1)?

@janta-8f2fp7 3 месяца назад

It is good man

@landonny 4 года назад

🙏

@Festus2022 6 месяцев назад

I'm not sure that the Base Voltage of 3.7 V is correct here, because it lacks the voltage input from the V-source/voltage divider. It seems that the BASE VOLTAGE is the Thevenin Equivalent voltage of 4.9V. It can't be both, and 4.9V satisfies the KVL loop for the Base-Emitter loop and represents the first entry into the big equation for Base current. The Thevenin equivalent voltage is the voltage produced by the source voltage and the voltage divider. The 3.7V value did not affect the other calculations, so I think this is a minor error. Any other input on this welcome.

@user-ub5su9vj6d 6 месяцев назад

😇😇😇👍👍👍🙏🙏🙏 The Best!!!!!!!!

@collinsmwangi707 Год назад

What if we are not given the values of R1,R2,..and we have the values of B=100,VBE=0.7v,VC=8v,VE=2v and Ic=1mA...then you are asked to determine the values of R1 R2 R3 R4...how can we tackle the Question

@BM-dq3bv 3 года назад

why does my book have completely different equations

@lawofselfcontrol 3 года назад

❤

@MrBonez208 2 года назад

Say I have a 10v source R1 is 1k ohm R2 is 100 ohms RC is 10k ohm RE is 100 ohms IC is 10ma Beta is 100 What’s the base voltage?

@weisun5461 Год назад

It seems that we assume B=200 holds for the circuits. Does anyone know why we can confidently use B=200? Or in other words, how do i know that the circuit is running in the active zone before i start solving it?

@brandonfd789 11 месяцев назад

The beta is determined by the specific transistor that you use, you will have to research the part number to find it on the data sheet or calculate the value yourself.

@weisun5461 11 месяцев назад

@@brandonfd789 Thanks, Brandon! I understand that is the value specified in the data sheet. My question is more about how to determine that the transistor is working in the linear active region, so the B is perfectly 200? Why is the transistor NOT in the saturation region? Or cutoff region ?

@Dhruv-Kumar 7 месяцев назад

@@weisun5461 this question makes sense only for active mode transistor.

@abdelfattahadel4175 Год назад

All peace from the Middle East

@ifesinachiekeneme1304 10 месяцев назад

Pls what do you mean by thevenin resistor???

@deandreswiftszn6588 4 года назад

first!

@boff2014 2 года назад

You have complicated not simplified this one.

@thelionheartelelectronical9295 2 года назад

😟😟😟 hi man I don't understand this calculation you are making here you plug a number and then you are leave a question mark 20900+30000=50.900+BITA+1= FROM IB 9.954*10 MA so you block this number alone but never see the account creation😠😠😠😠you confuse more people

@pantelisdj1 3 года назад

why dont you buy something like a 40 dollar mic, it will increase your production quality immensely since audio is the most important part of the videos. Not saying you sound bad, but even a razer headset has a better microphone. Thank you for your tutoring

@alohahoward1 3 года назад

He sounds great to me, perfectly clear and no distortion so I don't know what u are complaining about.