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
Among several insightful intro vids about opamps, this is the best! My favorite part is how elegantly you explain the "Virtual Short circuit" principle at 3:07. When I was in college, my professor simply asked us to remember but no explanation on why.
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
I want to congratulate you on your teaching skills. You are clear and concise in your explanations. You are a reference in simplifying a subject to its core. Continue te good work. I am also looking for your next video.
In September will be taking Op- Amps and last year the people who took the class 3/4 of the class failed . So l’m preparing myself for next term . Thanks for the video very informative
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.
So even if we apply differential inputs the op amp will try to match them both? Because i read that the op amp uses the difference and amplifies that and I also read that the common mode input gain is relatively less than the differential gain. Can anyone help with this?
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).
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.
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!
I don't get it, how can amp inputs have 0 current as you say? Then according to the Ohm's law input resistance is 0, which is not practically possible.
That’s an immediate stumbling block at the beginning. Keep in mind that despite your measurement of voltages, an op-amp is dealing with current. Put a pin in that. It will be very helpful as you learn more.
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.
you have to tell your brain to make a special exception to this case your brain is trying to apply old knolwedge of how circuit boards work to a component that isnt completely illustrated as it really is.
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.
يا عم إنت زعلان لية دا بواب والله بواب أساسا متعود إنه لازم يكون له سيد.... فاكر مورتادا كان بيعامل ويكلمة ويتكلم علية إزاي وكان راكنة ع الرف وامير كان بيعاملة علي إنه خيشة..
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.
Not sure if this is a question or statement, however, after explaining what op-amps are, we created a few videos that give the examples. They can be found in this playlist: th-cam.com/play/PLfYdTiQCV_p6tWY5Wwjgefa7AX2YiDRQ4.html
Amazing! as a hobbiest, this really is the most clear and understandable tutorial i have come across on youtube!
arabic! :)
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
Among several insightful intro vids about opamps, this is the best! My favorite part is how elegantly you explain the "Virtual Short circuit" principle at 3:07. When I was in college, my professor simply asked us to remember but no explanation on why.
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
EE student here,, i feel like as soon as i learn it, it falls out of my brain, this is helping, great explanation.
I want to congratulate you on your teaching skills. You are clear and concise in your explanations. You are a reference in simplifying a subject to its core. Continue te good work. I am also looking for your next video.
What a joy to listen to this man! He has a very soothing voice and it's a joy to watch him teach!
Just about to start my electrical engineering degree, this is very helpful! I really appreciate the time you put into your videos!
Thanks!
In September will be taking Op- Amps and last year the people who took the class 3/4 of the class failed . So l’m preparing myself for next term . Thanks for the video very informative
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.
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.
Thank you I studied this ages ago and needed this refresher!
Those videos help me in university. Thanks a lot.
Happy to help
Never heard a clearer explanation anywhere . Even at college.
Grateful for your descriptive explanations! Thank you so much!
Really helped with my control systems exam. Thanks!
Glad it helped!
Thank you for a very interesting and informative lesson.
Clear explanation.
Best regards from Indonesia country 🇮🇩
incredible video helps a lot for my circuit theory lessons thanks
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!
well explained unlike the rest on here! Thanks!
Excellent class . Ty for explaining for the blissful 😁
Welcome!
You’re a lovely teacher
Thank you! 😃
Thanks alot. i think we need more of this in many of our courses
Absolutely!
Thanks for making this so easy to understand. Excellent channel!
I'm lost at V+ and V-. Is that the same with V+ and GND? What if V+ is 12v, what is V- then?
Tricky concept for newbies explained quite nicely!
Honestly, best explanation yet!
Do you have a video on how to make the gain nonlinear?
great video explaining it rlly well :)
Very nice explanations! 👏👏👏
So even if we apply differential inputs the op amp will try to match them both? Because i read that the op amp uses the difference and amplifies that and I also read that the common mode input gain is relatively less than the differential gain. Can anyone help with this?
May I ask like if V V negative is connected to the ground, why can it have the voltage same as V positive?
Yes more op amp videos please!
More are coming!
Thank you for this video
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).
Life saver. Thanks!
Glad it was helpful!
thanks for sharing great information
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.
Love your channel! I've subscribed :)
Thanks!
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?
Thank you!
you are amaizing, thank you
I don't get it, how can amp inputs have 0 current as you say? Then according to the Ohm's law input resistance is 0, which is not practically possible.
No, input resistance is infinity, 0 resistance would give “infinite current” or a short
I love you man so much.🥰
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
That’s an immediate stumbling block at the beginning. Keep in mind that despite your measurement of voltages, an op-amp is dealing with current. Put a pin in that. It will be very helpful as you learn more.
Good show
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.
you have to tell your brain to make a special exception to this case your brain is trying to apply old knolwedge of how circuit boards work to a component that isnt completely illustrated as it really is.
V+ would be 12v
V- would be -12v
Or
V+ would be 24v
V- would be 0v
Thanks 🙏👍💯😊💖👑🌹
Subscribed
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.
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.
great
Looks like a Dorito
Did not understand why opamp is even a thing. Too complex. Was it invented to drive newbies crazy or something?
👁🔺
يا عم إنت زعلان لية دا بواب والله بواب أساسا متعود إنه لازم يكون له سيد.... فاكر مورتادا كان بيعامل ويكلمة ويتكلم علية إزاي وكان راكنة ع الرف وامير كان بيعاملة علي إنه خيشة..
Google translate had a field day with this one. Something about an uncle?
Why is circuit bread logo in the background using the communist fist?
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
One of the worst explanations of the subject. Throwing your hands into the air doesn't help at all.
Why people tend to always explain shit instead of giving examples how it works
Not sure if this is a question or statement, however, after explaining what op-amps are, we created a few videos that give the examples. They can be found in this playlist: th-cam.com/play/PLfYdTiQCV_p6tWY5Wwjgefa7AX2YiDRQ4.html