Razavi Electronics 1, Lec 42, Op Amp Circuits 1

Рет қаралды 117,461

Behzad Razavi (Long Kong)

Күн бұрын

Op Amp Circuits I (for next series, search for Razavi Electronics 2 or longkong)

Пікірлер: 67

@zizo-ve8ib 3 жыл бұрын

I have to admit when my friends told about this playlist in my first semester as an electronics engineering student I was a bit skeptical since I didn't put much thought to it and the time of each lecture was about an hour, but now that I've seen this video ,and it REALLY gave me knowledge when I didn't have a clue about op amps, I'm thinking of revisiting the whole playlist in my semester vacation, sincere thanks from Egypt professor

@mohitupadhyay4866 4 жыл бұрын

such a good effort to spread knowledge and that also free of cost. Real knowledge make people good inside-out. thanks from INDIA

@Upgradezz 4 жыл бұрын

Indeed buddy

@inspectormag 3 жыл бұрын

As an Iranian engineer, I am so proud of you! Professor Razavi! I found your name in a reference and searched you then and found you are a great Iranian-American professor and you have many lectures here. I am not electronic engineer but being an electronic engineer was my dream from a long time ago when I was a teen and used to make some electronic boards or repair some stuffs and now I am very interested to learn and study by myself. Thanks for your great work to students! stay healthy!

@karamany9870 3 жыл бұрын

Iranian EE are great. Check out Ali Hajmiri

@Aman-xi7eo 2 жыл бұрын

@@karamany9870 can you please tell us about more good lectures in the domain of digital circuits, communication signals

@1973jdmc 4 жыл бұрын

You sir deserve a medal. Heart felt THANK YOU for an OUTSTANDING LECTURE- I salute you.

@aamirm 2 жыл бұрын

As a teenager, I played with electronics, built simple transistor amplifiers, used to draw PCBs on paper and simplify to understand better, repaired CFL ballasts. Despite my interest in electronics, I couldn't enroll into electronics degree course. But watching your lectures, my interest in electronics have rekindled. Have watched 40 lectures of your course 1. You have simplified concepts and calculation to the extent I couldn't imagine. Thank You Dr Razavi for your awesome lectures! May Allah SWT bless you in every respect for imparting invaluable knowledge and experience you have

@maximecholvy2813 5 жыл бұрын

Great explanations, once again. You care about leaving nothing that could be misunderstood. That's very appreciable.

@imankian 8 жыл бұрын

This is great! We're waiting for the next series!!!!!!

@suryamohan8678 5 жыл бұрын

you are the god of electronics.i have never seen anyone who has this much clarity about analog circuits.thank you so much sir.

@jeroenxie9047 5 жыл бұрын

Professor, you are my savior!

@khuongtranminh4104 2 жыл бұрын

What an incredible explanation! Thank you, sir!

@SudhanshuChoudhary1 8 жыл бұрын

Excellent! Thanks! Please load more series from the Master.

@manishsolanki3497 4 жыл бұрын

Best Analog electronics lectures I have seen

@rajivdey3103 5 жыл бұрын

Respected sir, you are great I think I have not seen anybody in this world who teaches like you hates off

@arjunp7527 2 жыл бұрын

Thank You Prof Razavi for the wonderful lecture

@Millers1231 7 жыл бұрын

Razavi is the one true saviour

@Halowajan 6 жыл бұрын

Sir your teaching is awesome...I m enjoying it.. thanks..

@user-tw7dx9lv4l 2 жыл бұрын

Helped a lot, thank you professor

@psrikrishnareddy1081 8 жыл бұрын

excellent work sir... Waiting for more videos on Analog circuits

@AmrBinAas 2 ай бұрын

Thanks Razavi Sir ✨

@behzadjabbari6627 7 жыл бұрын

Excellent.

@karenwood1037 4 жыл бұрын

Just a BIG thanks....😀😄😄😁👍

@habtamusium8646 2 жыл бұрын

nice presentation ! quit understandable thanks!

@akshatavdaggi2350 6 жыл бұрын

Excellent ..Thanks sir

@gevorggeghamyan1718 5 жыл бұрын

You're the best

@abhinavsingh5873 6 жыл бұрын

sir, i am eagerly waiting for next series, please make it sir.

@Upgradezz 4 жыл бұрын

Ma Foi! Excellante!

@MrVasugupta 7 жыл бұрын

When is the next series of videos coming?

@sushmanv8052 3 жыл бұрын

Super lecturer 🙏

@youcefaitamrane4074 3 жыл бұрын

Dear Mr Razavi. I'm very greatful to you for the lectures you are providing on KZfaq. Excellent pedagogy ! Do you give lectures on Communication ? Kind Regards Youcef

@4everlovedan90 6 жыл бұрын

so cool

@ndilipkumar4159 6 жыл бұрын

sir please please do more video on feedback concept and circuit teory

@user-hf2xm7hz6m 7 жыл бұрын

The last equation of inverting op with A0 not very large, the voltage gain = -1/(R1/R2+(R1+R2)/A0*R2), is that right?

@vprakash2471 4 жыл бұрын

Yeah bro that's what i too got

@Peter_1986 3 жыл бұрын

Yes. However, I personally prefer to write that equation as "voltage gain = -A0*R2 / (A0*R1 + R1 + R2).

@anupammathur17 3 ай бұрын

yes you're correct!

@nomqn1861 Жыл бұрын

at 52:28, the gain of this CS stage is directly used to derive the open-loop gain, but isn't the gain of CS stage only valid with a small signal? with this Vout swinging, it is more close to determining the quiescent operating point of the CS stage in my mind. So why shouldn't we concerned about the validaty of using this small-signal gain in "big" signal analysis?

@nikhilzawar2746 Жыл бұрын

at 28:57 seconds - why did you put a positive sign at the ground terminal in the op amp and a negetive sign on the other input terminal of the op amp?????

@toddmoore112 Жыл бұрын

why doesnt current through R2 enter opamp because output impedance of opamp is 0 ?

@zihadislam8694 7 жыл бұрын

how does the equation of the non inverting op amp when the gain is not high form? Vout/Vin= Ao/(1+R2/R1+R2* Ao). anyone can explain where from do it come/

@kramer3d 7 жыл бұрын

Use Vout = Ao (V+ - V-). V+ = Vin. V- = Vout *R2/(R1+R2) (from voltage divider at node X). Then just solve for Vout/Vin

@zihadislam8694 7 жыл бұрын

kramer3d thank u so much

@divyanshuvadehra3779 5 жыл бұрын

Why didnt that op amp given in the quiz not saturate despite being connected in positive feedback?

@souravsen2981 2 жыл бұрын

It didnt saturate because the output of the CS amplifier is itself negative so that makes the system a negative feedback system, however if the output had been connected with the -ve terminal of the opamp, the negative signal from the CS coming as a feedback would again change its polarity to positive and that's what my friend! would make the system unstable.

@zizo-ve8ib 3 жыл бұрын

Question : when we worked on case 2 of the inverting op amp why did we say the current only goes across R2 even though Ao isn't infinite, did we assume Rin is still infinite ?

@souravsen2981 2 жыл бұрын

Yes, generally for any practical opamps also the argument of Rin being very large holds good.

@adityatripathi02 Жыл бұрын

The inverting and non inverting input terminals of the opamp are generally MOSFET gates which have an infinite impedance which is why all the current from R1 can only pass through R2. This should hold true regardless of Ao being infinite or not.