Operational Amplifier: Inverting Op Amp and The Concept of Virtual Ground in Op Amp

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In this video, the inverting Op-Amp configuration and the concept of virtual ground in Op-Amp has been discussed.
Why do we require feedback in Op-Amp?
Op-Amp is a very high gain differential amplifier. So, in open loop configuration, even a small differential input (in micro volts) is applied between the two terminal of the Op-amp, then also the output will be get saturated. And we can not use it as an amplifier.
Because in the amplifier the relation between and the output is linear.
So, to control the gain of the op-amp and to use it as an amplifier, negative feedback is required in op-amp.
Inverting Op-Amp configuration:
In this configuration, the input is applied at the inverting end of the opamp and the output voltage is 180 degrees out of phase with the input. that is why it is known as the Inverting Op amp configuration.
What is virtual Ground (Virtual Short)?
This concept is applicable during the negative feedback only.
Because of a very high gain of Op-amp, the differential input voltage signal used to be very small and almost negligible.
So, the voltage difference between the inverting and non-inverting input terminal will be approximately equal to zero.
Or we can say that both the terminals are at the same potential.
It means that there is virtual short between the two terminals.
So, if one terminal is at ground potential then another terminal will appear to be at ground potential, (Although physically it is not grounded).
This concept is known as the virtual Ground Concept.
Time stamps for the different topics covered in the video:
0:34 Why do we need the feedback in Op-Amp (Negative Feedback)
3:08 Inverting Op-Amp configuration
3:47 Concept of Virtual Ground in Op-Amp (What is virtual Short)
6:38 Derivation of Inverting Op-Amp Configuration
This video will be helpful to all students of science and engineering in understanding the Inverting Op-Amp Configuration and the concept of virtual ground in Operational Amplifier.
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Опубликовано:

24 июл 2024

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Комментарии : 536

@ALLABOUTELECTRONICS 6 лет назад

Time stamps for the different topics covered in the video: 0:34 Why do we need the feedback in Op-Amp (Negative Feedback) 3:08 Inverting Op-Amp configuration 3:47 Concept of Virtual Ground in Op-Amp (What is virtual Short) 6:38 Derivation of Inverting Op-Amp Configuration

@mr.amp0076 6 лет назад

Next video kab ayega?? Vi... Jaldi lana...

@ALLABOUTELECTRONICS 6 лет назад

very soon.

@irock2382 5 лет назад

Bohot mast Sir!!

@symbionictitan4074 4 года назад

Thank you sir I finally understood 👍

@tomc642 4 года назад

Like all your excellent videos. I have seen this explanation of virtual ground many times, but it is always lacking something. Here the opamp is drawn with a feedback loop, but the huge gain of the open loop opamp is used to explain that the inputs are at virtual ground. Then it turns out that the gain of the opamp with feedback is by several factors smaller than the open loop gain. This would then mean that the inputs are not at virtual ground? Am I missing something in this explanaton. I like to look at it as a differential amplifier with equal bias currents in each branch, so that both inputs have the same voltage.

@goyaldeekshant 3 года назад

Too good. I will refer it to all my classmates.

@aanikethghosh2343 2 года назад

DON'T!!! Keep it to yu and surprise them 😉

@kushagraacharya4629 Год назад

Hehe....you had probably lost trust in most of your friends for keeping this channel as a secret to themselves😂....

@MatheusSilva-dragon 4 года назад

Wow, now THIS is teaching! You presented all of this so crystal clear! My teacher could learn a thing or two (or three) with you!

@garnett657 4 года назад

This vid helped me out a million but lol why you guys always speaking down on the Professors tho….the learning experience is always different went learning at your own pace and time.. Like watching youtube tutorials in the comfort of Your home Versus some huge lecture room with a lecture session that cant be paused or rewind.

@asamoah-danquahstanislaw2002 3 года назад

yea, my teacher really needs to see this video

@vprashamshi6705 Год назад

My teacher learns from this and teaches 🤣. He himself told about that

@primevigilante7259 3 года назад

this man right here is saving lives with these videos.

@akkahshhagarwaal2056 6 лет назад

Explained in a very lucid and interesting manner. Thank you very much sir! You have uplifted the desire of learning electronics in me.

@siddhantv1 Год назад

I can't see how college professors with so many degrees can't explain the same concept as easily as you do

@ayush7800 Год назад

It's because we don't listen to the professors during class, but are very attentive while watching on yt ( as most of us are here just before exams ).

@AnjaneyaParashar Год назад

@@ayush7800 ++

@rupeshr936 Год назад

@@ayush7800 spot on reply👌

@RiddhiGupta-bc3mv 10 месяцев назад

Sahi hai

@leadnitrate2194 10 месяцев назад

@@ayush7800as someone who listens to the prof, I can confirm this guy teaches better

@himanshushekhardas1730 5 лет назад

I can't find words to say how good your lectures are sir !!!

@priyanshigupta1117 4 года назад

Sir u explained the concept pretty well in brief period of time. In my college we had lecture of 45 min on this which u made me understood in 10 min

@anjalisinghchauhan5360 Год назад

you had a lecture.*crying in corner*

@strangerguy7248 Год назад

@@anjalisinghchauhan5360 You had a feminist attitude *crying in side*

@anjalisinghchauhan5360 Год назад

@@strangerguy7248 dude try to understand... I'm saying we were never taught this topic in class at least they had a lecture... *crying in paris*

@srivatsaa.r.9936 6 лет назад

yr video on OP_AMPLIFYER Is WELL thought and executed. the person delivering the lecture/teaching performance Is praise worthy. very clear. s.vatsa

@ramamurthy7937 6 лет назад

Tq very much sir please make more videos like this and help more students to have clear concept and get succeed in life tq so much

@NerdyCatCoffeeee 2 года назад

Found my Indian guy from youtube. Thank you, dude. A lot of detail is always awesome to see

@srivatsaa.r.9936 6 лет назад

sir yr video on INVERTING OP_AMP IS EXCELLENT AND CLEAR. Yr special aptitude in teaching Is praise worthy. In life many will try to teach but only very few will succeed and you are no.1 amongst them. thanks s.vatsa

@tqaquotes9379 2 года назад

03:47 I was watching this video for the virtual ground concept, and I must say this part is especially good.

@Rahul_Raju 5 лет назад

the best tutorial on op amps ,presented in a lucid and down to earth manner.loved it. at my age of 61, i have learnt the basics in just one lesson.KEEP it up.

@footballinshorts2711 2 года назад

Pardon me if I sound rude ,but why did you wanna learn this at 61 years of age?

@gena8414 4 года назад

I really understood it pretty well. Though you shouldn't have used the word "feedback" before defining it. Thanks!

@amruthas6974 5 лет назад

I see that the concepts are explained in the description too.. thank u so much sir.. i am a btech student graduating in 2020.. i am preparing for campus placements from your video. Plz do more videos .. hats off👌

@circuitsanalytica4348 4 года назад

Hello Amrutha, he had explained this topic in an excellent way....

@sharvilb2420 3 года назад

3yrs ago video, helping me and my bois 3days bfore the exam!🙏 Hope you were our online class lecturer!👀😶❤️

@mayankmathur4667 3 года назад

bro i am repeating the same feat as urs let's see how it goes

@upadyaruwanpura2 2 года назад

Sir, You are a life-saver.😍 I don't know why my lecturers can't explain like this.😣

@ramlenka7063 4 года назад

Life-saving channel, Thanks a lot

@hasanxnv 4 года назад

you have an amazing gift of explanation. I love that

@bahaatamer1245 5 лет назад

SIMPLY AMAZING! - Please keep up the amazing work!

@vanhoangtran8783 Год назад

Thank you very much, it helps me many things. I learned this at school ( and I forgot this) but thanks to your videos, I can understand this better.

@happytulip1451 3 года назад

The way of your explanation is too good sir.....thank you so much....

@Vaijuuuuu 3 года назад

Thank you so much sir... it's really amazing...I will refer it to my classmates too..we are really lucky to have you

@asamoah-danquahstanislaw2002 3 года назад

thank you soo soo much you are really becoming one of my favorite youtube teachers.

@amulyasuryateja9701 3 года назад

Very much much much better than my college lectures💯💯💯 Thank you so much❤

@kingjibaieaieaie2279 4 года назад

I love you so much for explain this like a profesional !

@gkspeednetinternet9160 6 лет назад

my all doubts are gone away......excellent sir...thanku so much...

@psrisaiteja5047 5 лет назад

Thanks for giving clarity on inverting amplifier

@mabdulla3105 Год назад

Thank you Sir, I just started in Electronic lab assistant job. It is very informative

@haritharamachandran2961 3 года назад

This was really helpful. I understood the concept clearly.

@md.mamunurrashid466 3 года назад

Innovative video. It is very much helpful to understand the op-amp.

@user-ll1ze8sh2p 3 года назад

Very good RU-vid. You are much better than my professor. You make me understand the electronic, my professor just confuses me, maybe it is his job to confuse me

@gondukarteek1714 4 года назад

Superb way of teaching.. I just loved it ❤❤

@melvinsaji2805 3 года назад

SUCH A CLEAR EXPLANATION THANK YOU VERY MUCH SIR GOD BLESS 🙏 YOU

@sais.here.5869 4 года назад

god bless u brother for providing free lectures

@saikatsRhythmicRiffs 6 лет назад

My concept is now totally clear. Thank you sir. Please release more video .

@ronjoybhowmik9535 6 лет назад

SAIKAT DAS hope you dont get a backlog

@rahulranjan7899 5 лет назад

@@ronjoybhowmik9535 haha

@RAMezzone Год назад

Thanks for this very well presented & explained analysis.

@saswatapatra5919 5 лет назад

BEAUTIFUL!!! AAH maza aa gaya bhaisaab.. now how often do you see people making such types of comments on study related videos?

@pratiksingh5022 3 года назад

Amazingly explained sir...... thankyou 🙏🏻...keep making such videos for us

@eshaghazali2482 5 лет назад

Amazing video tho! Helped me a lot. Thankyou so much for this. 💪

@priyankag4065 11 месяцев назад

No boring,easy understanding 👍👍👍

@phucnguyenhuu804 6 лет назад

thank you very much..the video helped me understand the theory better

@yashwantkumar1951 2 года назад

Very well explained... And presentation is also really good. Keep the good work continue 🤘

@ashjaahmedkhan3254 5 лет назад

Bhai badiya batata he yr tu meko bhi tere jesa banna he ek no.👌✋

@debabratarouth1235 6 месяцев назад

Amazingly explained sir, so helpful. Thank u so much.

@akshayaraja1180 6 месяцев назад

Answered all my doubts without asking .tqsm …tat too one day before exam😃

@rohithss7738 5 лет назад

U were teaching excellently sir😍

@Pr3kashSingh 4 года назад

No video can be better than yours.. 😘

@adrishbhattacharya508 2 года назад

Great lecture. Understood the concepts well

@anupamchatterjee1820 5 лет назад

kya bat sir....dhansu padhate ho app....maza a gaya

@itsak4235 3 года назад

Awesome.... crystal clear explanation

@blatogh1277 6 лет назад

Gosh that really helps a lot for my class!

@kychemclass5850 2 года назад

My Op-amp fog is lifting. Thank you so much!!!!!

@sumathiuppari7178 3 года назад

Simply amazing explanation....the total concept is in simply easy way .thank you so much.....but bhaiah "I request you to explain a little bit slow"...

@yaminabatool3793 6 лет назад

Really helpful description.. Thanks 👍

@shreeyashrasal8574 4 года назад

Awsm explanation sir👌👌 Crystal clear concept

@bharammr5130 4 года назад

Awesome explanation sir thaks a lot.

@mayankgautam6527 2 года назад

Very well Explained. Topic become simple and interesting .

@rohitht8720 5 лет назад

Thank u sir Ur teaching is superb

@yadugirin2564 3 года назад

this is so dman good it fells like some iit teacher has taught this

@acandmishra Год назад

Excellent explanation , really very helpful

@Hiyori___ 2 года назад

Thank you so much. so well structured explanation

@monicaarputharaj59 3 года назад

Suprb explanation sir...thank you👏👏

@abuanas8569 4 года назад

Very fine explanation.Thank you so much

@rajshukla5663 2 года назад

You teach better than my profs here at iit

@Brutishh 6 лет назад

I ‘ve seen ur 2 basic videos of Operational amplifier ..They r really good and I request you to explain by taking some problems asked in competitive exams...Plz

@ALLABOUTELECTRONICS 6 лет назад

Yes, if you have seen my last videos on op-amp (Integrator and Differentiator), I have taken some examples. And anyway I am going to make a dedicated video on problems based on the op-amp. But before I make that video, I will cover few topics like the gain-bandwidth product, slew rate, CMRR and offset voltages in Op-amp. So, that I can cover a variety of questions based on the op-amp.

@ashishrout5265 2 года назад

awesome video , good explanation and very helpfull.thank you

@akshatchoudhary895 3 месяца назад

Tomorrow is my ec end semester exam and i learn so much from this video

@bravomarco2419 4 года назад

인도아저씨 덕분에 공부잘하다가요.

@hasnainali7897 3 года назад

Excellent vedio with concepts please write the theory in background what you are speaking 🗣️ it will help alot to make notes

@damithaliyanage8226 2 года назад

Thank god u saved me! Great content!

@arjuno195 2 года назад

Make more videos learning never stops🙏

@yassinet.benchekroun5087 5 лет назад

Thank you so much!! Very clear!

@dheerupayasi 3 года назад

Thanks so much

@amitsubhash1586 2 года назад

Thank you for the consice and clear answers, it helped me so i hope this comment helps you in the algorithm game)

@ananyathakarey8416 5 лет назад

Thank you sir. The videos are awesome

@tpsicmin 2 года назад

Thanks Sir Amazing Explanation

@kushagrapunia 3 года назад

Amazingly explained

@nishantpancholi8768 4 года назад

Very good job sir..!

@rajapudasaini1599 3 года назад

Truly Masterpiece :)

@dinushachathuranga7657 Год назад

amazing explanation. Thanks a lot.❤

@bhavishnagubandi328 3 года назад

I have a question, For proving the virtual ground concept we consider gain very high e.g 10^6. But by choosing different values of Ri and Rf we got gain as 2. Will this not contradict our virtual ground concept?? Please explain!!!!!!!!!!!!!!!!!!!!

@SreenikethanI Год назад

same doubt!!

@tusharnitharwal 4 года назад

What would happen if i interchange the positive and negative terminals in the inverting op amp?

@tomc642 4 года назад

Like all your videos. I have seen this explanation of virtual ground many times, but it is always lacking something. Here the opamp is drawn with a feedback loop, but the huge gain of the open loop opamp is used to explain that the inputs are at virtual ground. Then it turns out that the gain of the opamp with feedback is by several factors smaller than the open loop gain. This would then mean that the inputs are not at virtual ground? Probably a good explanation that would include a differential amplifier with matching, and equal branch currents is too advanced.

@SreenikethanI Год назад

same doubt!!

@muneerghure2933 6 лет назад

That's a nice video ☺

@jessicaclarke-beattie9804 2 года назад

I finally understand, thank you!

@samarpreetsingh5318 4 года назад

Excellent video!👌

@nped5054 4 года назад

Is the virtual ground a phenomenon that is built from the summing point constraint? Because there should not be any form of a voltage that is flowing into the op-amp itself?

@tonylee9055 4 года назад

HI sir, so which mean for the inverting amplifier the output value should be negative with a "-"sign?

@ramilawijesuriya7259 2 года назад

Great video. Thanks a lot !!

@ayushjha4611 3 года назад

Video is very good all concept are clear but which software are you using for this..

@nikshepbangera5416 3 года назад

amazing stuff bu ti have a doubt.. at 4:28 .. u use the the open loop gain equation Vout = Av*Vd to prove that virtual ground is in feedback ..so it is confusing because that equation is for open loop without feedback

@mayurshah9131 6 лет назад

Just Superb!!

@Abhisheksharma-lk4ll 4 года назад

Bhaiya mazza aa Gaya aap sae padh kae

@ashhary81 4 года назад

Thank you very much. It helps

@Dr-UmarFarooq 4 года назад

Very effective lectures dear......Can you please guide me which software did you use to make the slides? Secondly how are you writing on the slides with a pointer? I shall be very thankful to you

@vishnu7245 5 лет назад

good explanation💜

@abunaser4522 4 года назад

I think being 180 degree out of phase and being negative is really different thing. The effect of 180 degree phase shift is the same as negative signal only for sinusidal and some symmetric signals. not all of them.

@ALLABOUTELECTRONICS 4 года назад

Yes, that's true.