This is one of the best videos on opamps I have ever seen. Clear and consistent, obvious at every step, with practical demos. I’d expect a follow up with some examples of practical use.
I am a beginner and I sure am glad I subscribed. Op amp functionality has baffled me for so long and nobody has been able to describe it the way you have! Big thanks👍
Thank you sir. I learned about this many years ago when I was studying electrical engineering but have never had to use it in my entire career. It's nice to revisit it.
I am a valve/tube guy. Guitar amps. This video is incredible. The possibilities for using DC offset to deliberately violate the voltage rail 'limits' and force asymmetric distortion is fascinating. Thank you so much. ❤
Many thanks for your comment. I never really learnt much from school. It was only after being exposed to real world situations that I became interested in certain topics and was then highly driven to learn.
9:30 Absolutely mind-blowing explanation! 🤯🤯 Even though I was already familiar with the concept and have applied it in my circuits (though I'm far from an expert), I still learned so much from this. Your channel is incredible! Please keep making these amazing videos with such amazing examples...
One of the best videos! I was actually following what you were explaining. Usually I'm more dumbfounded when people soar through the explanations but you did it very clearly and thoroughly. Lovevto see more!!!
This is all above my pay-grade, but certainly a great video and wonderful channel. I will subscribe for future use whenever the case comes about. Cheers.
Your "Boris Model" of opamp operation is SUPERB! I love it! The 741 was my first ever IC back in the mists of antiquity... And I remember that that is one of the few opamps that DOES have an offset null... I find it amusing that, on your comparison chart, the 741 has the very worst offset voltage of them all and so has the greater need for an offset null. Maybe that's why the offset null pin slowly disappeared... it just wasn't important any more.
Wow, that's saying something! I do highly recommend that viewers also take a look at Dave Jones' Op-Amp videos (if not already done so). A mix of alternative explanation techniques is always helpful (partly why I started this channel). Anyway, many thanks.
Glad you enjoyed and thanks for the comment. More videos coming and in the meantime there are many others already on my channel if you haven't already watched. This particular video took quite some effort to prepare, as did the 555 (It's Not A Timer) and Impedance (One Guy Missing) videos.
Hi Paul. When discussing the summing amplifier used as an audio mixer on web tutorials no one seems to mention that if you have different values of R1,R1.1 etc. then the “ channels” will have different gain AT THE SAME TIME. For example you could have R1and R2 as 4M7 and R1.1 as 47K. The R1.1 “ channel “ would then have a gain of 100, for a microphone say, while the gain of the R1 channel would still be 1. As an aside, since the summing amplifier depends on the virtual earth, it’s best to use an op-amp with a nice high Fet input.
Hi, thanks for the comment. That video felt like a 100 mile an hour run through so much stuff it was not really feasible to delve to much into each aspect and circuit. I do intend doing a follow up video whilst putting together an audio mixer project for my office. A lot more detail will be given in that. Watch this space..... 🙂
4:12 What is interesting here is that way back in time... during the 1960's-70's.. when integrated circuits started to become generally available - the idea of a differential input amplifier with easily repeatable " ideal " characteristics to form an operational amplifier such as very high gain.. high input impedance , low output impedance etc became readily available. Called the "operational amplifier" this was presented / taught to us EE students more as a device that could accurately represent / simulate an "operation" such as add, multiply ' divide, differentiate, integrate, perform as a low pass / high pass / band pass filter etc . Hence the name " operational amplifier" - or "op-amp" As such... op-amps were typically configured to simulate processes such as say a car suspension system, or a mechanical control system - which was called "analogue computing". This is all well before digital computing !! A typical "analogue computer" system project which we worked on simulated the movement of a tank gun barrel in response to a desired input The idea being to get the gun barrel to move to precisely the right direction quickly.. without overshoot using a number of op-amps to simulate this with adjustable settings.... One could easily change parameters to see the effect of changing variables such as mass, damping, motor torque. Positional feedback ratio etc . Quite efective in its day!
Current is indeed a flow of negatively charged electrons.. which of course are attracted to the positive source. Unfortunately.. way way back in time before this was known... it was postulated that current flowed positive to negative... and it stuck ! Everyone knows its back to front... and its called conventional current flow. So what you will see on almost all electronic circuits is current flow shown in the direction +ve to -ve . That is why the diode is marked that way - it assumes conventional current flow. Its also why an npn transistor "emitter" terminal is shown with an arrow pointing outward.. showing conventional current flow from the collector which is biased positive And a pnp transistor with the emitter arrow pointing inward.. showing conventional current flow towards the negatively biased collector Just one of the things you have to get used to!!
I'm not going to get used to it, so just assume everyone else is WRONG. I believe that electrons flow from negative to positive. Full stop. I keep this in mind at all times. When I see nomenclature like Vss or Vdd (source or drain), it makes more sense than Vcc (collector).
@@davidgari3240 Yeah they do and we all get it smarty pants and you do you but as said " Rules of the game are the same" it works just fine for us and has done for years.
Oh lord! µS is microsiemens, a unit of conductance (reciprocal of resistance). If you are talking about time the abbreviation for seconds is s, so microseconds are µs.
absolutely beautiful.. great lecturing
Many thanks, glad you liked.
This is one of the best videos on opamps I have ever seen. Clear and consistent, obvious at every step, with practical demos. I’d expect a follow up with some examples of practical use.
Many thanks. Yes, more Op-Amp videos to follow. I will probably do the Audio Mixer project mentioned in this one.
I am a beginner and I sure am glad I subscribed. Op amp functionality has baffled me for so long and nobody has been able to describe it the way you have! Big thanks👍
That's great to hear. Thanks for the comment and thanks for Subscribing too.
comprehensive practical presentation for lab enthusiasts. enjoyable to watch.
Many thanks for the comment. Glad you enjoyed it.
Thank you sir. I learned about this many years ago when I was studying electrical engineering but have never had to use it in my entire career. It's nice to revisit it.
Glad you liked it. Thanks for the comment.
This is by far one of the best electronics videos I've seen on YT!
Many thanks, much appreciated.
Thank you. This has to be one of the best explanations I've seen on Opamps.
Brilliant! Thanks for watching and thanks for the great comment.
I am a valve/tube guy. Guitar amps. This video is incredible. The possibilities for using DC offset to deliberately violate the voltage rail 'limits' and force asymmetric distortion is fascinating. Thank you so much. ❤
Glad you found it useful and many thanks for your comment, much appreciated.
I wish I had you as my teacher! Very well explained.
Many thanks for your comment.
I never really learnt much from school. It was only after being exposed to real world situations that I became interested in certain topics and was then highly driven to learn.
Excellent content, this is second time watching and I’m sure I’ll be watching again many times.
Great! Keep watching :) Thanks for your comment.
9:30 Absolutely mind-blowing explanation! 🤯🤯 Even though I was already familiar with the concept and have applied it in my circuits (though I'm far from an expert), I still learned so much from this. Your channel is incredible! Please keep making these amazing videos with such amazing examples...
Many thanks for your comment, much appreciated. I particularly like the Boris tug of war too 🙂
One of the best videos! I was actually following what you were explaining. Usually I'm more dumbfounded when people soar through the explanations but you did it very clearly and thoroughly. Lovevto see more!!!
That's great to hear. More videos coming......
i got so excited when i saw this video pop up! your 555 timer video was so good i couldnt wait for one about op amps!
Hope you enjoyed this one then :) . Thanks for watching and thanks for the comment.
That was a great explanation, thank you. Life would be easier if op amp manufacturers told us how many Borises their chips can output :)
Haha, indeed it would. Lets campaign for Boris ratings on all Op-Amps.
Excellent explanation keep doing more .
Thank you. More videos coming......
One of the best explanation of op amps. Thank you!
Thankyou, glad you enjoyed.
This is all above my pay-grade, but certainly a great video and wonderful channel. I will subscribe for future use whenever the case comes about. Cheers.
Great comment, thank you. Glad you liked and special thanks for Subscribing too.
Your "Boris Model" of opamp operation is SUPERB! I love it!
The 741 was my first ever IC back in the mists of antiquity... And I remember that that is one of the few opamps that DOES have an offset null... I find it amusing that, on your comparison chart, the 741 has the very worst offset voltage of them all and so has the greater need for an offset null. Maybe that's why the offset null pin slowly disappeared... it just wasn't important any more.
Quite possibly :)
this is way better than the eevblog opamp lesson!
Wow, that's saying something! I do highly recommend that viewers also take a look at Dave Jones' Op-Amp videos (if not already done so). A mix of alternative explanation techniques is always helpful (partly why I started this channel).
Anyway, many thanks.
Very nice how to get started video, with some great bench equipment. 🎉
Many thanks.
Thank full for this awesome video and description,
i hope to be all your coming videos at the same level or better
Glad you enjoyed and thanks for the comment.
More videos coming and in the meantime there are many others already on my channel if you haven't already watched. This particular video took quite some effort to prepare, as did the 555 (It's Not A Timer) and Impedance (One Guy Missing) videos.
Thank you so much. Perfect video for teach opamps.
Thanks a million! I love your videos. Very helpful with being an EE student
That's great, so glad you are finding these videos of use. Best of luck with your studies.
Very good video and explained excellent! Thanks.
Many thanks.
What a brilliant presentation. I can't imagine how much effort it took to produce the graphics and animations etc. Subscribed. Many thanks for this.
It took quite some time, but comments like this make it all worthwhile thanks. And many thanks for Subscribing.
Wow, what a great video, thanks mister! Keep it up, love to learn new stuff :)
Thank you, glad you enjoyed.
Hi Paul.
When discussing the summing amplifier used as an audio mixer on web tutorials no one seems to mention that if you have different values of R1,R1.1 etc. then the “ channels” will have different gain AT THE SAME TIME. For example you could have R1and R2 as 4M7 and R1.1 as 47K. The R1.1 “ channel “ would then have a gain of 100, for a microphone say, while the gain of the R1 channel would still be 1.
As an aside, since the summing amplifier depends on the virtual earth, it’s best to use an op-amp with a nice high Fet input.
Hi, thanks for the comment.
That video felt like a 100 mile an hour run through so much stuff it was not really feasible to delve to much into each aspect and circuit.
I do intend doing a follow up video whilst putting together an audio mixer project for my office. A lot more detail will be given in that. Watch this space..... 🙂
Another great video Paul, keep em coming ...........
Cheers Les.
Thanks, you explain everything nice and clearly :)
Thanks for your comment, much appreciated.
boris johnson thumbnail gave me a chuckle! great video!
Thanks very much, glad it made you laugh :)
4:12 What is interesting here is that way back in time... during the 1960's-70's.. when integrated circuits started to become generally available - the idea of a differential input amplifier with easily repeatable " ideal " characteristics to form an operational amplifier
such as very high gain.. high input impedance , low output impedance etc became readily available.
Called the
"operational amplifier" this was presented / taught to us EE students more as a device that could accurately represent / simulate an "operation" such as add, multiply ' divide, differentiate, integrate, perform as a low pass / high pass / band pass filter etc .
Hence the name " operational amplifier" - or "op-amp"
As such... op-amps were typically configured to simulate processes such as say a car suspension system, or a mechanical control system - which was called "analogue computing".
This is all well before digital computing !!
A typical "analogue computer" system project which we worked on simulated the movement of a tank gun barrel in response to a desired input
The idea being to get the gun barrel to move to precisely the right direction quickly.. without overshoot
using a number of op-amps to simulate this with adjustable settings....
One could easily change parameters to see the effect of changing variables such as mass, damping, motor torque. Positional feedback ratio etc .
Quite efective in its day!
What a great bit of history, many thanks.
Perfect timing for that tutorial for me.
Great to hear.
Amazing video! Keep going
Thank you. And yes, I intend to press on.
Subbed ! :) Happy New Year !
Many thanks for Subscribing, it makes a big difference.
Any chance you could do videos on the 7660 applications you show near the end?
Hi, yes that's an idea, I will add to the list. Thanks
Thank you boss ❤️
finally i've got it FFS!!! cheers mate!
Glad it helped.
Thank you sir
Thanks for watching.
💖💖💖💖
Electrons flow from negative to positive, against the arrow on a diode
Indeed they do. That is Electron current flow, I usually present using conventional current flow. Either way, the rules are the same.
Current is indeed a flow of negatively charged electrons.. which of course are attracted to the positive source.
Unfortunately.. way way back in time before this was known... it was postulated that current flowed positive to negative... and it stuck !
Everyone knows its back to front... and its called conventional current flow.
So what you will see on almost all electronic circuits is current flow shown in the direction +ve to -ve
.
That is why the diode is marked that way - it assumes conventional current flow.
Its also why an npn transistor "emitter" terminal is shown with an arrow pointing outward.. showing conventional current flow from the collector which is biased positive
And a pnp transistor with the emitter arrow pointing inward.. showing conventional current flow towards the negatively biased collector
Just one of the things you have to get used to!!
I'm not going to get used to it, so just assume everyone else is WRONG.
I believe that electrons flow from negative to positive. Full stop.
I keep this in mind at all times.
When I see nomenclature like Vss or Vdd (source or drain), it makes more sense than Vcc (collector).
@@davidgari3240 Yeah they do and we all get it smarty pants and you do you but as said " Rules of the game are the same" it works just fine for us and has done for years.
@@andymouse Right. If I'm consistent and get it backward _every_single_time_, everything works fine.
Oh lord! µS is microsiemens, a unit of conductance (reciprocal of resistance). If you are talking about time the abbreviation for seconds is s, so microseconds are µs.
too much borris. thumbs down
"My friends, as I have discovered myself, there are no disasters, only opportunities. And, indeed, opportunities for fresh disasters."