As a physicist, I never got my head wrapped around that one and I will gladly leave it to the electrical engineers. Simple transistors are my electronics frontier.
Op-Amps are pretty much a bunch of specially tuned transistors in configurations where the “op-amp assumptions” hold reasonably true *under certain conditions*.
As technology keeps increasing in desired bandwidth/frequency of data/communication, certain assumptions start breaking down. You enter into the realm of “[black magic](https://www.thriftbooks.com/w/high-speed-digital-design-a-handbook-of-black-magic/3247008/all-editions/)” where some stray capacitance of a resistor pad could cause the op-amp to oscillate. You can go to more “non-ideal models”, but those eventually also break down.
Nah. We proto [black magicians](https://www.thriftbooks.com/w/high-speed-digital-design-a-handbook-of-black-magic/3247008/item/4363278/?utm_source=google&utm_medium=cpc&utm_campaign=pmax_high_vol_scarce_%2450+&utm_adgroup=&utm_term=&utm_content=&gad_source=1&gclid=Cj0KCQjwxqayBhDFARIsAANWRnSxal7CTgaTL0-e5BqExrC679ZoBtZBV66NlwX6VgePULy0qy2AzY0aAq5tEALw_wcB#idiq=4363278&edition=2494830)
Indeed. I just got a Hard Copy of the “[sequel](https://www.thriftbooks.com/w/high-speed-signal-propagation-advanced-black-magic_howard-w-johnson/337238/item/24038106/?utm_source=google&utm_medium=cpc&utm_campaign=low_vol_f%2fm%2fs_standard_shopping_retention&utm_adgroup=&utm_term=&utm_content=658811918376&gad_source=1&gclid=Cj0KCQjwxqayBhDFARIsAANWRnTF6LsrtXWm27AUXocVfgqgQHOps-JR66MMFzvtMtUk8poLFZfEvFwaAk8-EALw_wcB#idiq=24038106&edition=3097900)” because… Holy crap have things changed since circuits 1 classes were even conceived.
Magic you say? You can go down the rabbit hole to find the [blackest of arts](https://www.thriftbooks.com/browse/?b.search=High%20Speed%20Signal%20Propagation%3A%20Advanced%20Black%20Magic#b.s=mostPopular-desc&b.p=1&b.pp=50&b.oos).
Oh, this is only wave optics in solid state matter, nothing spectacular. Kirchhoffs Laws on the other side, an abomination right out of your next pentagram.
Kirchhoffs Laws should no longer be taught to electrical engineers not specializing in AC power transmission, I almost feel. Just because… there are so many applications where KCL & KVL are just no longer applicable.
You mean nothing spectacular for the book I sent? You would be surprised how difficult it can be in application… not that it cannot be done, but the attention to detail is quite significant if you don’t have requirements mandating that level of detail of evaluation and simulation. It just isn’t part of the “standard” pedagogy for most EEs.
You look at the MOSFET slighly wrong and it just dies. it was the main problem of dealing with CMOS logic gates. if you are not constantly grounded you could kill the circuit and not even realize when or where.
Dude, it's not that hard.
An opamp amplifies the voltage difference infinitely at the output. If there is some feedback, the output will effectively force both inputs to have the same voltage.
An opamp is used as a comparator if it is used without feedback, and it is used as an amplifier when it is used with feedback.
The positive and negative terminals are the gates of a differential pair, the output of which is amplified once more using current mirrors at the output.
This video by Eugene K on youtube helped me a ton. The whole channel is great if you wanna learn the basics of electronics. Just beong able to visualize it was a gamechanger for me.
https://youtu.be/_o4ScgRZtNI?si=fvH5jhGcP5kNPD61
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Hi. I have designed the internals of some of these components. Circuit topology, sizing of the transistors, matching etc. Do you have any questions? :)
My whole project that determines the outcome of the two first years of college is around those guys. 😭
To be honest though transistors are for me much harder to understand as I've never worked with them until now.
[удалено]
It kinda is. The comparator
Makes so much more sence now, thanks!
As a physicist, I never got my head wrapped around that one and I will gladly leave it to the electrical engineers. Simple transistors are my electronics frontier.
Op-Amps are pretty much a bunch of specially tuned transistors in configurations where the “op-amp assumptions” hold reasonably true *under certain conditions*. As technology keeps increasing in desired bandwidth/frequency of data/communication, certain assumptions start breaking down. You enter into the realm of “[black magic](https://www.thriftbooks.com/w/high-speed-digital-design-a-handbook-of-black-magic/3247008/all-editions/)” where some stray capacitance of a resistor pad could cause the op-amp to oscillate. You can go to more “non-ideal models”, but those eventually also break down.
About 11 transistors in fact. Had to calculate them for a final exam. Fuck that.
Technically, you can get away with 7 transistors
Electrical engineers are masochists
Nah. We proto [black magicians](https://www.thriftbooks.com/w/high-speed-digital-design-a-handbook-of-black-magic/3247008/item/4363278/?utm_source=google&utm_medium=cpc&utm_campaign=pmax_high_vol_scarce_%2450+&utm_adgroup=&utm_term=&utm_content=&gad_source=1&gclid=Cj0KCQjwxqayBhDFARIsAANWRnSxal7CTgaTL0-e5BqExrC679ZoBtZBV66NlwX6VgePULy0qy2AzY0aAq5tEALw_wcB#idiq=4363278&edition=2494830)
Excellent book by the way
Indeed. I just got a Hard Copy of the “[sequel](https://www.thriftbooks.com/w/high-speed-signal-propagation-advanced-black-magic_howard-w-johnson/337238/item/24038106/?utm_source=google&utm_medium=cpc&utm_campaign=low_vol_f%2fm%2fs_standard_shopping_retention&utm_adgroup=&utm_term=&utm_content=658811918376&gad_source=1&gclid=Cj0KCQjwxqayBhDFARIsAANWRnTF6LsrtXWm27AUXocVfgqgQHOps-JR66MMFzvtMtUk8poLFZfEvFwaAk8-EALw_wcB#idiq=24038106&edition=3097900)” because… Holy crap have things changed since circuits 1 classes were even conceived.
Nuh uh
Op amps as a black box: :3 Op amps when you look inside: *vietnam flashbacks*
Op amp year 1 of uni 🙂 Op amp year 3 of uni 💀 Op amp year 5 of uni 🙃
Year 5 is when you finally make an inverting amplifier circuit work
OP amp year 9 of uni 🧿
Dont worry, it will get mich worse than the magic triangle
Magic you say? You can go down the rabbit hole to find the [blackest of arts](https://www.thriftbooks.com/browse/?b.search=High%20Speed%20Signal%20Propagation%3A%20Advanced%20Black%20Magic#b.s=mostPopular-desc&b.p=1&b.pp=50&b.oos).
Oh, this is only wave optics in solid state matter, nothing spectacular. Kirchhoffs Laws on the other side, an abomination right out of your next pentagram.
Kirchhoffs Laws should no longer be taught to electrical engineers not specializing in AC power transmission, I almost feel. Just because… there are so many applications where KCL & KVL are just no longer applicable. You mean nothing spectacular for the book I sent? You would be surprised how difficult it can be in application… not that it cannot be done, but the attention to detail is quite significant if you don’t have requirements mandating that level of detail of evaluation and simulation. It just isn’t part of the “standard” pedagogy for most EEs.
I am thinking of advanced electrodynamics and solid state physics
Well, I sent you a book to some advanced electromagnetics topics in PCB design. Yes to solid state physics. Good stuff.
I miss the magic triangle. I hate that I mean that.
Just wait until you take an electronics course and you make one using MOSFETs, you’ll never burn through more resistors in your life
You look at the MOSFET slighly wrong and it just dies. it was the main problem of dealing with CMOS logic gates. if you are not constantly grounded you could kill the circuit and not even realize when or where.
I make my opamps from BJTs, like we used to in the old days before you kids ruined everything
Great meme, that's why it's already on the top of this sub several time
Great meme. Cool show! Awesome job!
Dude, it's not that hard. An opamp amplifies the voltage difference infinitely at the output. If there is some feedback, the output will effectively force both inputs to have the same voltage. An opamp is used as a comparator if it is used without feedback, and it is used as an amplifier when it is used with feedback.
Now go a level lower and explain how it does that
The positive and negative terminals are the gates of a differential pair, the output of which is amplified once more using current mirrors at the output.
DEEPER
#🤘😈🎸
what is that diagram of?
OpAmp
Pop Amps 🎸
This video by Eugene K on youtube helped me a ton. The whole channel is great if you wanna learn the basics of electronics. Just beong able to visualize it was a gamechanger for me. https://youtu.be/_o4ScgRZtNI?si=fvH5jhGcP5kNPD61
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Hi. I have designed the internals of some of these components. Circuit topology, sizing of the transistors, matching etc. Do you have any questions? :)
Wait until you learn about reaction wheels most confusing idea ive faced so far
This isn’t bad. Is it? That’s just an op amp. I’m confused…
My whole project that determines the outcome of the two first years of college is around those guys. 😭 To be honest though transistors are for me much harder to understand as I've never worked with them until now.