Intro to Op-Amps (Operational Amplifiers) | Basic Circuits
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- เผยแพร่เมื่อ 13 พ.ค. 2024
- Operational amplifiers, or op-amps, were very confusing for me at first and in retrospect, it's because I made it too complicated for myself. So, let's keep things simple as we learn about op-amps, some of their distinguishing features, and the two important lessons to remember about them. This is just an intro and we strongly recommend watching the next op-amp videos as they come out for a more in-depth dive into how they work and common applications.
Parts of the video:
0:00 Introduction
0:30 Op-amps are easy
1:00 Basics of an op-amp
3:02 The first big rule
5:38 The second big rule
6:51 Real life op-amp complications (offset voltage, input bias current, slew rate, rail to rail)
13:05 Remember the two rules, and keep it simple
14:46 The toast will never pop up
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Amazing! as a hobbiest, this really is the most clear and understandable tutorial i have come across on youtube!
Amazing! as a electrical engineering student, this really is the most clear and understandable tutorial i have come across on youtube!
I’ve been watching videos on op amps for hours and every video glossed over these fundamentals.
Then I found this video and it now makes sense. The way you repeat the idea a couple of times with slightly different phrasing really helps me solidify the topic in my brain.
So many teachers explain an idea once then move on.
Thank you so much
Even though I'm graduating in just a few months, I love watching these videos to refresh myself on these concepts.
your introduction of concepts into terms that I was confused on in the book is remarkable. Slew rate went from scary to "ah that's just acceleration basically". Thanks mate
Just about to start my electrical engineering degree, this is very helpful! I really appreciate the time you put into your videos!
Thanks!
What a joy to listen to this man! He has a very soothing voice and it's a joy to watch him teach!
Grateful for your descriptive explanations! Thank you so much!
Life hack.
After watching hours, and hours of videos from Bobs R&D Academy
Finding this video makes me want that time back.
So the hack is.....
Just start here.
God Bless.
Never heard a clearer explanation anywhere . Even at college.
Thanks for making this so easy to understand. Excellent channel!
Thanks alot. i think we need more of this in many of our courses
Absolutely!
The art of explaining à complicate thing simply and clairly thank u sir for the video
This is guy is awesome! So much better than any electrical prof I have.
Clear explanation.
Best regards from Indonesia country 🇮🇩
Do you have a video on how to make the gain nonlinear?
Thanks Josh. I want to understand opamps, so I'll be following your series avidly.
Thanks! All but one of the tutorials planned have been filmed, they're just being edited now. I have high hopes that they'll be helpful!
Tricky concept for newbies explained quite nicely!
well explained unlike the rest on here! Thanks!
Very nice explanations! 👏👏👏
incredible video helps a lot for my circuit theory lessons thanks
Excellent class . Ty for explaining for the blissful 😁
Welcome!
thanks for sharing great information
Yes more op amp videos please!
More are coming!
Life saver. Thanks!
Glad it was helpful!
Thank you for this video
Love your channel! I've subscribed :)
Thanks!
Thanks! Quick question: That V+ And V- are above and below ground? (if not, is V- connected to ground in standard originally designed use of an opamp?)
You are correct that they're above and below ground. It makes powering them a little more complex than "normal" circuits but the op-amp output can only be within the range of those inputs. So if it needs to output a negative voltage, it can only do that if V- is hooked up to a negative voltage.
I have an input voltage bias question. I know how to scale. I have an input voltage that swings from 1v to 2v. I want that to swing from 0v to 3v. Do you have a video that demonstrates that?
you are amaizing, thank you
You’re a lovely teacher
Thank you! 😃
Thank you!
thanks. i'm abit confused still. what if, say Vin- is tied to ground and Vin+ is tied to 5v? how does the op amp keep these at the same voltages, without current flow?
If there's no feedback from the output, then they *won't* keep them at the same voltages. That being said, if you do have it setup like that and then also put in feedback, the op-amp will likely melt itself or simply max out. The key here is that, properly configured, the output will try and make the inputs match voltages. But without feedback, the output will simply act like a comparator (check that video out, it may help).
Good show
I love you man so much.🥰
Subscribed!
If V+ and V- have the same voltage, then shouldn't the output voltage equal 0? Since it's V_0=A(V+-V-)
Excellent question! There are two reasons that this wouldn't be the case (maybe more, but two that pop into mind). First, without feedback, even the slightest variation in the two inputs will cause the output to swing wildly. This variation could even be due to internal imperfections in the op-amp itself. The second is, with feedback, the output is forcing the input to match but it usually has some external influences as well. Plus, if the output voltage stopped driving in the input, they would be different again and the output would swing again to bring them back together. So it kind of reaches an equilibrium. I hope this helps!
@@CircuitBread thank you very much, it was very helpful!
@@CircuitBreadSo V_out is actually swinging all the time? Or the voltage gain equation does not apply?
thanks! i just received like 100 OP amps for $4, now i can actually know what im doing lol
th-cam.com/video/IOWBzwuNXaw/w-d-xo.html&pp=ygUJNzQxIHNwbGl0
Thanks 🙏👍💯😊💖👑🌹
Subscribed
I’m taking my first circuits class right now and plzzzz make a video on First and second order differential equations
I'm sorry, I don't think we'll be able to put something together in time to help you but I did recently get a new differential equations textbook so that I could review and get back up to speed on this. I have been considering an engineering focused math course where we go over those concepts that most apply to engineering. I don't think I'd do well with it personally, but Susie is a heck of a lot smarter than I am. She may be interested in tackling it when she's done with her current series.
great
Honestly, best explanation yet!
All I got was an op amp can , or maybe it cant do something, but dont worry about it.
I've been a tech for decades, and am confused. I see why some people change majors from EE to liberal arts.
So far, I'm in the middle of the video, and I'm struggling to force myself to believe that both V- and V+ are supposed to be the same. it does not make sense.
Yep, I really struggled with that idea as well at first. It helps to think that the op-amp is designed so that, with the correct supporting circuitry connecting the output and one of the inputs, the output is trying to drive the voltage on that connected input to match the other input. Sometimes it helps to look at an op-amp in the comparator configuration to see how that works in the simplest manifestation.
👁🔺
Looks like a Dorito
i'm sorry, you have done better in other videos. an OP-amp amplifies, keep it at that and then show how it does it. use an ideal vs a real condition, you lost me with side explanations.
I thought it was great