Op Amp Theory and Design - Phil's Lab #53
ฝัง
- เผยแพร่เมื่อ 28 พ.ค. 2024
- Operational amplifier (op amp) theory and design of a very simple op amp using discrete components (transistors, resistors, capacitors). Including content on op amp stages (difference amplifier, gain stage, output stage), bandwidth, gain-bandwidth-product (GBP), op amp performance criteria, negative feedback, and more. Final demonstrations of real-world implementation on a PCB using the Digilent Analog Discovery Pro.
[SUPPORT]
Free trial of Altium Designer: www.altium.com/yt/philslab
PCBA from $0 (Free Setup, Free Stencil): jlcpcb.com/RHS
Patreon: / phils94
[LINKS]
GitHub: github.com/pms67
Digilent ADP3450: digilent.com/shop/analog-disc...
[TIMESTAMPS]
00:00 Introduction
00:17 Content
00:53 Altium Designer Free Trial
01:17 JLCPCB
01:39 Op-Amp Basics
02:57 Open Loop View
03:37 Closed Loop View
05:00 Why is Negative Feedback Useful?
07:33 Negatives of Using Feedback
08:07 Implementation of Negative Feedback
08:58 Op Amp Sections
10:10 Design Goals
10:58 Difference Amplifier
14:29 Gain Stage
16:53 Simulation and Gain-Bandwidth-Product (GBP)
18:28 Test Circuit
19:48 PCB and Schematic Overview (KiCad)
22:06 WaveForms Overview
22:49 Test - Gain and Bias
24:18 Test - Gain-Bandwidth-Product
26:04 Test - Low- and High-Pass Filter
27:23 Test - Dominant Pole Compensation
ID: QIBvbJtYjWuHiTG0uCoK - วิทยาศาสตร์และเทคโนโลยี
This single video could replace a few weeks of electrical engineering lecture and labs I went through years ago. Great work!
Thank you very much, I'm glad to hear that!
No it couldn’t, without these hours of lectures, you would be completely lost watching that video (even though it is awesome, but these things take time to understand and masterize)
Would have been great for revision! But as enginstud says you have to become fluent in the language and that takes time. Amazing that 50 years on, it is still all so familiar…
I'm totally astonished why this channel has only 70k subscribers, considering so much insightful information in electronics
Phil, you are simply amazing dude. I am the one who wants to be an embedded system engineer so I have interest for both hardware and software. You are the best . Notifications are open !
Thank you so much, Kamil!
I try to understand the internals of am OpAmp since WEEKS, still not there.
But maybe I will build a similar board, using this nice "dual transistors" in 6-pin packages to get as well matched pairs as possible.
Thanks for all your gorgeous videos, you are one of my the leading advanced teachers here on TH-cam.
You make really nice Videos. I like how much information you do provide and how deep you go into details in this short amount of time.
Thank you, Johnny!
Amazing content!!! I wish I had these videos 15 years ago while I was in engineering school!
Phil's a legend. Great work, Great explanations, nice matter of fact approach to some quite difficult subject matter. He makes it accessible in a way that we rarely see.
I come back to this periodically for a refresher because its wonderfully concise and digestible ...cheers.
Thank you, Andy - glad to hear that!
I thought I knew everything about opamps, but I was wrong! This is the first time I see someone really using discrete transistors instead of an IC 😥😎. Pretty impressive work for such a basic topic!!
Thank you Phil for your efforts!
Thank you very much for your comment, Davide!
World class content. Super simple implementation of concepts which are never presented so well in undergrad classes. Keep it up.
Thank you very much, Brian!
Excellent video. Hope you will cover stability of such an opamp soon. I'd love to see second order compensation methods like TMC. They are a great advantage of discrete opamps.
Awesome video! Maybe you should do a dedicated series of videos regarding how to use opamps (the first half of this video), as your explanations are very clear and precise. And maybe some follow-up videos going deeper into the opamp of stages. For example, we hear about long tail pair difference amplifier but not much explanation about how they work.
Phil your videos are always excellent. Great work!
Thank you very much, Mike!
Crazy to see someone reduce a whole year of electronics engineering concepts in a 28 minutes video, you are amazing dude !
Thanks a lot, Julian - glad you found it helpful :)
Outstanding video Phill..hope you will cover stability issue with feedback in detailed in future... stability is the most difficult topic to deal with
Thank you very much! Yes, I'm planning on making a whole video dedicated to (negative) feedback.
Great work Phil, Thank you. Im looking forward to signing up to future courses with you. You are an excellent source of information and its application. I always highly recommend you to anyone seeking knowledge and a clear explaination.
Thank you very much, Dean! Also thanks a lot for recommending the videos to others :) Currently quite busy with work and making videos but am still working on the FPGA/advanced hardware design course.
Great detail and analysis, very good lecture!!
One of the best video on the subject! @Phil I hope you will release more courses in the future. You are a great teacher!
Fantastic lecture!!! Congrats Phil!!
Thank you, Juliano!
thank you Phil, I really enjoy your videos, u are the best👍👌
Thanks for watching, Mostafa!
Just when I needed it the most, you delivered. Thank you so much!
Thank you very much for watching!
Amazing video, many thanks for sharing.
Thank you, Murat!
Way better than a semester worth of uni classes lol. Great job Phill! As usual, your videos are top notch 👌🏼
Incredible video as always. Clear and practical ✍️
Thank you, Alejandro!
You really make great videos!
Thank you!
I was searching for these and you uploaded, I think you also got idea from veritasium😀
Glad to hear that :) I actually don't follow Veritasium, but will check it out now that you mention it.
Thanks, Phil. This video is very helpful!!! I hope more similar videos about EE knowledge will coming on your channel.😁😁😁
Thank you, Franco - definitely have more EE content planned :)
Great video!
Great video, thank you. It will be great if you can make a tutorial for TIA and multistage amplification using op-amp.
Great video
Thank you very much
Yeah, this video fills in a lot of blind spots in such a short duration.
And yet it is not overloaded with theory. That's rare.
Thank you, Leeroy!
Wow, this is amazing. Is there any books you recommend for studying this topic?
Another good one! Thanks!
Thanks for watching, Anders!
thx for this lesson
Hello!! Great video! A question: how did you measure the gain of the input stage and the voltage gain stage? Using a very very small input in order to not reach the supply rails in the output?
Very good video!
Thank you!
Clipping is undesirable unless you want a gnarly overdrive sound, haha! Would be an interesting way to make a hard-clipping circuit or a fuzz of some kind. However, with the usual 9V power rails in a guitar pedal, that would be insanely loud. Great video Phil!
Thank, Jose! Haha yeah would probably sound pretty rough the way it's clipping there but who knows. Definitely wanna make a video on overdrive/distortion in the near future though :)
You are damn good.... Want more videos from you😊
I think it might have been useful, to compare the major ballpark "specs" of the opamp you created to a real-world jellybean part, like ua741 or lm358; to give some context to how much better (or worse?) a bog standard IC can be.
Nice Video
Thank you!
excellent!
Thank you, Nathan!
Thanks for sharing your knowledge, Phil =)
I'm sitting here in Kyiv about 8 miles from the russian positions and soaking it in
Hi, do you know anything that deals with the design of an operational amplifier? do you know where I can find the version with a differential nmos pair and not pmos?
Im here because im confused about something I realized in an opamp schematic. It was my understanding that one input could accept a positive or negative input voltage, however when I looked at the schematic it was only npn transistor on both input. Npn transistors wont turn on with a negative voltage. So either there is npn and pnp opamps or im missing a trick
Guten Abend, hast du eine Literaturempfehlung für den Schaltungsdesign? Lg
Make a video about Crossover 3 way active by Opam, please!!!
Why can't teachers teach like this?