Hi all! We hope you learned some helpful info about MOSFETs with this video - we have a lot more tutorials and videos on different semiconductors as well as other electrical engineering / electronics topics. Go check them out on our TH-cam channel or on our website - www.circuitbread.com/
Hi, I really ❤️ your video. I am a teacher from Bangladesh. Most of student don't understand english. I like to teach them in your way.❤️ Please, can you tell me what software you use. Specially the 3d animation part. Thanks. #respect.
BEST video HANDS DOWN.. I had no clue about MOSFETS, in fact I kinda got intimidated how TF these monsters worked. But it explained me in the best possible way.
@@andrey-kramer Any 3D modelling/animation tool will achieve pretty much the same results. If you want to get into 3D modelling, you can get started with Blender since it's free and has a pretty wide community so you can get help if you're stuck
Excellent video! Specially because you taught the principles beforehand. Also, your observations about the terms and your explanation about "region" were great - you are an excellent teacher, sir!
Bygod... 4 weeks of my professor yelling and pointing at formulas makes no sense to a visual learner like me. This is just what I needed, Cheers mydude.
You sir are awesome, my professor has some old-school books/presentations. In them you get lost after the first 2 sentences, while this video explains everything in less than 5 minutes, thank you again and have a good day! :) Also english isn't my mother tongue so be nice :)
bro need to get this channel to like grow like asap like asap asap cuz my professor have a heavy ass accent and speak hella fast and talk like we understand everything already inside out
Hay quá ad ơi. Tìm kiếm rất lâu rồi mới tìm ra video dễ hiểu như vậy. Điểm ấn tượng nhất của video và phần mô tả bằng hình ảnh 3D. Cảm ơn ad nhiều lắm. Chúc sức khỏe và hẹn gặp lại nhé!
Cảm ơn bạn đã bình luận và tôi rất vui vì nó hữu ích! Tôi xin lỗi, tôi đang sử dụng Google Dịch nên hy vọng điều này có ý nghĩa. Chúc may mắn với mọi thứ và chúng tôi hy vọng sẽ tạo thêm một số hướng dẫn về CMOS trong 12 tháng tới.
Thank you very much for this. Although I struggled with certain terms, the fact that you acknowledged it can be tricky at first; helped me to think I need to stick at it and it will eventually come. You have a good presentation style and I look forward to watching g more of your videos. Thank you and greetings from Sheffield in UK.
Thanks for mentioning how the substrate is usually connected to ground. I dont understand how everybody talks about the gate voltage without mentioning where that connects to.
As @sureshchattu5211 mentioned in another comment, I believe you have the two region names confused at 2:11 and 2:34. From my understanding the area before VGS equals the threshold voltage is the Ohmic region. The region past the threshold voltage when the MOSFET is fully conducting is the Saturation region. If I'm wrong please let me know! Otherwise this was a fantastic video!
Thanks! We actually did another video that addresses this specifically: www.circuitbread.com/tutorials/what-are-the-different-regions-of-operation-for-a-fet I think, in this case, the biggest challenge is that, in this video, we are showing what happens when you increase VGS. Yet almost all graphs that show this curve, including ones we've made, have VDS as the x-axis. So, to help see why we *think* we are right (hey, I'm not going to claim perfection - ever) look at one of those graphs and then, instead of moving left to right, choose a VDS voltage and then look at the regions you move through as you go from the bottom to the top. It'll be cutoff, saturation, then ohmic (or linear). Hopefully between that quick explanation and the other video, this will be clear. TH-cam is not great about notifying us of responses to comments but I would love to hear if that cleared things up!
@@CircuitBread thanks for the reply! This makes total sense and I agree, the terminology is incredibly confusing! Your linked article does a wonderful job of further explaining these regions, thanks!
I am not a degreed electronics engineer, HOWEVER this is how that ACTUALLY seems to work: when circuit between pos (gate side) and neg termimal are connected the electrons flow to that capactitor gate and thus fill that channel and current starts flowing across that channel. Thanks in advance for saying THANKS!
I was at my 1.year in material science in 2018, we had lab with 2 pHD , professors, from each field, chemistry, physics, asked a lots of questions,but still nobody could explain how this operates. 2 years later I found this! :D
YES I DO KINDA HAVE AN IDEA HOW A MOSFET WORKS BUT MORE INFO IS NEEDED. THANKS FOR THE VIDEO. NOW IF I CAN JUST FIGURE OUT HOW DO CAPS OFF, I'LL BE ALL SET.
n-FET, p-FET. They can disconnect a charging circuit from just the voltage output of a solar panel... like a diode. But using the Vgs threshold voltage (saturation voltage). When theres no sun, theres no voltage to saturate the gate of the mosfet allowing the mosfet to turn ON. Mosfets are really cool. The solar panel(s) dont draw from the battery during the night, because there's no sun. Theres no voltage on the gate. of the n-FET.
I am an Electrical Engineering student and this video was very helpful! You do a great job of explaining the basics of MOSFET operation in a short amount of time, though I did have to lower the video speed and go back a few times to make sure I understood what was being said. I have one question, though: Could you explain again the relationship between Saturation and Linear/Triode region? My textbook says that the Linear region occurs as the "pinched" channel forms, and Saturation occurs when the channel is fully open, but your terms are switched?
This is such a common question (and something that confused us for a long time as well) we did a video on it! th-cam.com/video/o3M2sOCGCKs/w-d-xo.html Hopefully it clarifies things.
We have some series that we're working through at the moment but I'm accumulating a few one-off topics that I'd like to address. I have added JFET to it!
We're hoping to create a repository of simple circuit examples on CircuitBread.com that would include various use cases for MOSFETs. I'm not sure how quickly we'll get it live or how fast it'll grow but we are expecting to start building that in a month or two.
Layer: some atom layers. Channel what you read as technology node , so 100 nm for 1 Vdd ? 6502 was started at 5000 nm. You can see the width of some gates on the die shot. When there is a fan out, the previous gates are all widened up. Also the pins got large drivers where the gate needed to be folded because it is so wide.
I like your description of the functionality of the device but I would like to see the device used in a real world circuit and possibly an explanation of the benefit of why this device was chosen instead of a different (less complicated) device. Thanks for the video.
Thanks for the feedback, Bruce! We're going to include MOSFETs in our Circuits series, showing them in practical and real-world circuits - that series is currently being developed.
Thank you very much.Thank you for your effort. I would like to ask two questions.How are holes arising through the positive voltage and what makes them to leave the channel? It would be very kind if you can give me a detailed answer because I love to learn things as detailed as I can. I thank you very much in advance
At what time in the video? We only want charge carriers close to the gate. A diode in reverse has this nice depletion region to get rid of stray carriers. Just apply a voltage to the body ( bottom ) relative to everything on the top side. Some MOSFETs are used in applications where source and drain change roles. Mostly IC. That‘s why I would not assume that one too electrode is directly connected to the bottom electrode.
Yep! Or at least the one shown is. Sometimes manufacturers will put in other features (like a flyback diode on a power MOSFET) that will make it so the FET is not interchangeable. Or they'll make internal connections that will force it to be one way versus another. But, again, as shown and in many MOSFETs, they are interchangeable.
That inversion layer forms as the voltage is increased and the depletion layer moves downward. It's still not conductive if you only have enough voltage to create the depletion layer but not enough to get the free carriers in that inversion layer. Or do you mean how do the electrons get up to the inversion layer when it's in a non-conductive material? I'm not 100% sure of that one, but I believe the electrons can be pulled from the source and drain or even pulled through the less-than-ideally conductive depletion layer.
Great video! I just don't understand one thing, what controls the gate voltage? Because in order to translate the open or closed state of the transistor into Boolean algebra, you have to constantly change the gate voltage, so I wanted to know how this was achieved.
Thank Nathan! The gate voltage is manually (or externally) controlled by something else. From that vague phrase, you can extrapolate out to either an external source (if you're messing with a discrete MOSFET directly with a power supply) or another part of the circuit (like a flip-flop further up the line in an integrated circuit). From a digital logic/boolean perspective, you don't normally worry about the gate voltage (or the different operating modes) of the FET, you simply focus on whether or not the FET is "open" or "closed".
The great thing with depletion mode is that you can just connect transistors in many ways and it just works. Look at the weird CMOS gates which are in use in any modern computer.
will doing this with gluons and quarks give warp tech ? is antimatter needed ? how does one control subst? particles ´´without the risk öff igniting more aka the höle atmö^^
2:03 I am pretty sure this is incorrect. Saturation region is when Vgs > Vth but Vds > (Vgs-Vth). Saturation region is when the inversion layer is already formed and there is current but increasing Vds has no effect on carrier velocity (current). Fight me!
We did a tutorial on just this topic here: www.circuitbread.com/tutorials/what-are-the-different-regions-of-operation-for-a-fet I'm a bit confused, though, as I agree with you. I think the confusion, in this video at that point, we're talking about changing Vgs and assuming Vds is constant, whereas when we're looking at graphs, it's usually Vds on the x-axis that is changing. Taking more time to give a more complete view, we created the other tutorial so please check it out and let me know if we're still supposedly in disagreement. Also, TH-cam doesn't notify me of follow-up comments, so I may be more unresponsive in the future. Don't take it personally!
@@CircuitBread Ok. I suppose if Vgs is still below Vth at that point in the video, then there's no conduction through the channel and there's channel pinching, but textbooks don't seem to call this saturation region yet (CMOS VLSI Design, 4th Ed., Pg. 62-63). They let Vgs > Vth so that there's current between D S. Then they increase Vds such that drain's depletion region widens and pinches the inversion layer, however there's still drift current happening and the elections in the depletion region are accelerated due to drain's attraction. In your case, there's no current in the saturation region and that seems to be the troublesome thing. Do you see what I mean? Textbooks go: cut off, linear, and saturation (where there's current in saturation).
I see what you mean, for it to be in saturation, there has to be a Vds voltage, which would cause a current to flow (perhaps not significant but there would be a current). As technically, if Vds is 0, it will be in cut-off no matter what Vgs is. I'm sorry, this can definitely be confusing. This is the problem with us trying to only briefly review this idea - I'm not sure if we should have left the operating regions alone completely in this video and just referred people to the other tutorial dedicated to the topic. I feel that one does a significantly better job explaining this particular concept.
This always confused me and is why we created this tutorial specifically: www.circuitbread.com/tutorials/what-are-the-different-regions-of-operation-for-a-fet It gets into more detail on the different operating regions. Hopefully it will clarify things!
Hi all! We hope you learned some helpful info about MOSFETs with this video - we have a lot more tutorials and videos on different semiconductors as well as other electrical engineering / electronics topics. Go check them out on our TH-cam channel or on our website - www.circuitbread.com/
You're great presenter, thank You!
I lofe your voice in the first thirty seconds. I can listen and learn from you.
VGS VTH and VDS > VG-VTH
did I misunderstand anything …!
saturation
@@sureshchattu5211 May be, he confuse between Vgd with Vgs. I think "gate threshold voltage" is replaced to "gate to drain voltage".
Hi,
I really ❤️ your video.
I am a teacher from Bangladesh. Most of student don't understand english. I like to teach them in your way.❤️
Please, can you tell me what software you use. Specially the 3d animation part.
Thanks. #respect.
Great video. You have explained it better in 5 minutes than my professor have in 3 hours
"Kuk i" means "Cock inside" in Swedish. Have a nice day.
True
Nah your professor explained t better you just cleared your concepts and revised the topic here
Yah I agree with you.
Came here after my first Electronics class and learned everything we talked about in 5 minutes. Thank you
You learnt about mosfets in your first electronics class? I'm learning about it in my 2nd year of university lol
@@zaks7 I'm learning about it in my third yr lol
But you got through a 2 hour lecture. This will stick more than a 5 min video, what I wjll forget in a day
@@zaks7learning in first year😢
BEST video HANDS DOWN.. I had no clue about MOSFETS, in fact I kinda got intimidated how TF these monsters worked. But it explained me in the best possible way.
Blessed with an excellent video on how MOSFETs work. Studying EE has never been easier. Today is a good day and I wish y'all the best.
Thank you!
Great info, graphics, and editing!
Thanks! This is one of my personal favorites, to be honest.
@@CircuitBread hi
what program you use for 3D modelling MOSFET ? (from 0:56 and later)
@@andrey-kramer Any 3D modelling/animation tool will achieve pretty much the same results. If you want to get into 3D modelling, you can get started with Blender since it's free and has a pretty wide community so you can get help if you're stuck
Excellent video! Specially because you taught the principles beforehand. Also, your observations about the terms and your explanation about "region" were great - you are an excellent teacher, sir!
Awesome, thank you!
Bygod... 4 weeks of my professor yelling and pointing at formulas makes no sense to a visual learner like me. This is just what I needed, Cheers mydude.
Awesome, that's exactly what we were hoping for! Glad it helped out.
This is the best video on MOSFETs I have encountered to date. I'm glad Robert Feranec linked it in one of his videos, this channel seems decent.
Thanks for the feedback! Robert's videos are fantastic but I didn't realize he had linked to this from one of his. That's awesome!
Single Best explanation of Mosfets I have ever seen on the internet, GOOD JOB!
You sir are awesome, my professor has some old-school books/presentations. In them you get lost after the first 2 sentences, while this video explains everything in less than 5 minutes, thank you again and have a good day! :)
Also english isn't my mother tongue so be nice :)
you have better grammar than most english speakers
Great video. You have explained it better in 5 minutes than my professor have in 3 hours
ALSO YOUR EYES ARE WONDERFUL
Had a ruckus in finding good videos that makes you understand the working ....then found this channel...... life saver❤
bro need to get this channel to like grow like asap like asap asap cuz my professor have a heavy ass accent and speak hella fast and talk like we understand everything already inside out
Thank you sir. It refreshed my dusty knowledge of college... so wonderful.
This deserve a billion views..! Very well explained..Thanks a lot sir😍😍
Awesome, I'm so glad it helped! Thanks for dropping us a note 😀
best mosfet tutorial. good job circuit bread! :)
Thank you!!
Thanks for the explanation. My prof just rushed through this during his lecture and I couldnt understand how it worked.
After watching multiple videos on this subject this is the one that actually made it click. Very nicely done and thank you.
Thank you! The explanation is very understandable with the animated image of the MOSFET structure
This is such a masterpiece. Thank you!
Thanks for the feedback, I appreciate it!
Subscribed
Hay quá ad ơi. Tìm kiếm rất lâu rồi mới tìm ra video dễ hiểu như vậy. Điểm ấn tượng nhất của video và phần mô tả bằng hình ảnh 3D. Cảm ơn ad nhiều lắm. Chúc sức khỏe và hẹn gặp lại nhé!
Cảm ơn bạn đã bình luận và tôi rất vui vì nó hữu ích! Tôi xin lỗi, tôi đang sử dụng Google Dịch nên hy vọng điều này có ý nghĩa. Chúc may mắn với mọi thứ và chúng tôi hy vọng sẽ tạo thêm một số hướng dẫn về CMOS trong 12 tháng tới.
thank you, that animation really helped me to understand how it works
You're welcome, Omar, I'm glad it helped!
wow such a good video. In 4 minutes I have a deeper understanding than hours of googling.
Crazy how much better this video is than my professors reputation as a prof
Thank you very much for this. Although I struggled with certain terms, the fact that you acknowledged it can be tricky at first; helped me to think I need to stick at it and it will eventually come. You have a good presentation style and I look forward to watching g more of your videos. Thank you and greetings from Sheffield in UK.
Thanks for mentioning how the substrate is usually connected to ground. I dont understand how everybody talks about the gate voltage without mentioning where that connects to.
Yeah, definitely! I remember that being a very confusing point to me as well.
There are some talented people out there who can explain things in few mintues which universities professors take hours to explain.
well described especially for beginners with good graphics and animation
Such a good and clear explanation of what a MOSFET is. Thank you!!!
You're welcome!
No cap this is a really good explenation of how these things work.
Thank you! This made things so much clearer, and got to the point.
Before your explanation, I thought that mosfet was a mixture of metal filings and it oxide. Thank you, great work, your brother from Algeria.
Wonderfully explained! Gave a much better understanding about MOSFET now.
exactly what i needed, nice animation. Thanks a ton!
Awesome, glad it helped!
My Solid State Physics final is coming, thank you for this video and wish me luck
Excellent description and graphics!
So well explained and yet so underrated!
As @sureshchattu5211 mentioned in another comment, I believe you have the two region names confused at 2:11 and 2:34. From my understanding the area before VGS equals the threshold voltage is the Ohmic region. The region past the threshold voltage when the MOSFET is fully conducting is the Saturation region.
If I'm wrong please let me know! Otherwise this was a fantastic video!
Thanks! We actually did another video that addresses this specifically: www.circuitbread.com/tutorials/what-are-the-different-regions-of-operation-for-a-fet I think, in this case, the biggest challenge is that, in this video, we are showing what happens when you increase VGS. Yet almost all graphs that show this curve, including ones we've made, have VDS as the x-axis. So, to help see why we *think* we are right (hey, I'm not going to claim perfection - ever) look at one of those graphs and then, instead of moving left to right, choose a VDS voltage and then look at the regions you move through as you go from the bottom to the top. It'll be cutoff, saturation, then ohmic (or linear). Hopefully between that quick explanation and the other video, this will be clear. TH-cam is not great about notifying us of responses to comments but I would love to hear if that cleared things up!
@@CircuitBread thanks for the reply! This makes total sense and I agree, the terminology is incredibly confusing! Your linked article does a wonderful job of further explaining these regions, thanks!
Awesome! Glad to hear!
Incredibly easy to understand!
Thank you!
Yes, it is a technological achievement that changed our civilization. WOW.
This is a good summary
I was the exact 1001 person who liked his video, so awesome !!!
😊
This alongside a practical example would be nice. Setup a basic circuit with meters. Cheers.
I am not a degreed electronics engineer, HOWEVER this is how that ACTUALLY seems to work: when circuit between pos (gate side) and neg termimal are connected the electrons flow to that capactitor gate and thus fill that channel and current starts flowing across that channel. Thanks in advance for saying THANKS!
Very clear description. Thank you.
Absolutely brilliant work on this video! Thank you so much!
You're welcome!
I was at my 1.year in material science in 2018, we had lab with 2 pHD , professors, from each field, chemistry, physics, asked a lots of questions,but still nobody could explain how this operates. 2 years later I found this! :D
häh wait 4 yör first uav ^^ blü fändär xD
Very well explained and the animations helped a bunch! Thanks!
Really such a good explanation
very cool! Thanks for showing this clear and simple animation, it helped a lot to get the idea through!
Awesome, glad it helped!
YES I DO KINDA HAVE AN IDEA HOW A MOSFET WORKS BUT MORE INFO IS NEEDED. THANKS FOR THE VIDEO. NOW IF I CAN JUST FIGURE OUT HOW DO CAPS OFF, I'LL BE ALL SET.
This is an incredible explanation. Thanks!
so informative. great video to jog the memory
Very good way to imagine how it operates! Thanks !
very good and easy explanation. Thanks
Thank you very much for the easy-to-understand video. You saved me from many confusions.
You're welcome, glad it helped!
This is a fantastic video, thanks for making it!
BIG FAT THANK YOU FOR YOUR GREAT EFFORTS AND SIMPLIFICATION
Awesome video. Very well explained. Just subscribed the channel
n-FET, p-FET. They can disconnect a charging circuit from just the voltage output of a solar panel... like a diode. But using the Vgs threshold voltage (saturation voltage). When theres no sun, theres no voltage to saturate the gate of the mosfet allowing the mosfet to turn ON. Mosfets are really cool. The solar panel(s) dont draw from the battery during the night, because there's no sun. Theres no voltage on the gate. of the n-FET.
Good job!
At least in this presentation the lecturer was sensitive to his audience's confusion with the various technical terms.
well explained, Please make a video on L-C resonance
really great explanation. thanks !
Thank you sooo much for this video. Please keep making
I am an Electrical Engineering student and this video was very helpful! You do a great job of explaining the basics of MOSFET operation in a short amount of time, though I did have to lower the video speed and go back a few times to make sure I understood what was being said. I have one question, though: Could you explain again the relationship between Saturation and Linear/Triode region? My textbook says that the Linear region occurs as the "pinched" channel forms, and Saturation occurs when the channel is fully open, but your terms are switched?
This is such a common question (and something that confused us for a long time as well) we did a video on it! th-cam.com/video/o3M2sOCGCKs/w-d-xo.html Hopefully it clarifies things.
really good explanation
Excellent video, thank you! Subscribed.
Your videos are excellent!!
Can you please make a video on working of junction filed effect transistor(JFET)
We have some series that we're working through at the moment but I'm accumulating a few one-off topics that I'd like to address. I have added JFET to it!
@@CircuitBread
Thank you very much
The lower part of the mosfet is a jfet. You could mirror the top electrodes to get rid of it.
This is an excellent video that being university notes on FET.
Cheers.
Great video! Thank you!
Really good video!! Subscribed!
Awesome, thank you!
I understood more in this video than my prof's lectures
Great video as always. Thanks a lot.
I think it would be nice to see examples of various use cases too.
We're hoping to create a repository of simple circuit examples on CircuitBread.com that would include various use cases for MOSFETs. I'm not sure how quickly we'll get it live or how fast it'll grow but we are expecting to start building that in a month or two.
Super duper helpful, Thank you so much!!!
6th of December I have my exam . THANKS ❤
What are some common values in micrometres for L, W and the oxide layer thickness?
*Common dimensions in units of µm*
*Length: Your*
*Width: Mom*
Layer: some atom layers. Channel what you read as technology node , so 100 nm for 1 Vdd ? 6502 was started at 5000 nm. You can see the width of some gates on the die shot. When there is a fan out, the previous gates are all widened up. Also the pins got large drivers where the gate needed to be folded because it is so wide.
I like your description of the functionality of the device but I would like to see the device used in a real world circuit and possibly an explanation of the benefit of why this device was chosen instead of a different (less complicated) device. Thanks for the video.
Thanks for the feedback, Bruce! We're going to include MOSFETs in our Circuits series, showing them in practical and real-world circuits - that series is currently being developed.
great explanation. thank you .
Thx for the Input !
Very helpful 🙆🏽♂️🙈
Thank you!! It is easy to understand
Are you mixing up subthreshold and saturation? In saturation you definitely have Vgs>Vt and it’s Vds that puts you in saturation/pinch-off.
Thank you. very good exlanation.
Thank you very much.Thank you for your effort.
I would like to ask two questions.How are holes arising through the positive voltage and what makes them to leave the channel?
It would be very kind if you can give me a detailed answer because I love to learn things as detailed as I can.
I thank you very much in advance
At what time in the video? We only want charge carriers close to the gate. A diode in reverse has this nice depletion region to get rid of stray carriers. Just apply a voltage to the body ( bottom ) relative to everything on the top side. Some MOSFETs are used in applications where source and drain change roles. Mostly IC. That‘s why I would not assume that one too electrode is directly connected to the bottom electrode.
So the structure of a MOSFET is symmetrical and hence Source and Drain are completely interchangeable?
Yep! Or at least the one shown is. Sometimes manufacturers will put in other features (like a flyback diode on a power MOSFET) that will make it so the FET is not interchangeable. Or they'll make internal connections that will force it to be one way versus another. But, again, as shown and in many MOSFETs, they are interchangeable.
They put these in airsoft guns, so this helped me understand how they work inside. Thanks!
Brilliant keep up!!
Great video. Only confusion I have is, why are the N type regions represented with a + sign?
The "+" signs are not necessary but they're usually used to indicate that the regions are heavily doped. Hope that helps!
How excactly does the inversion layer form if that region of the substrate has become non conductive due to a depletion layer being formed there?
That inversion layer forms as the voltage is increased and the depletion layer moves downward. It's still not conductive if you only have enough voltage to create the depletion layer but not enough to get the free carriers in that inversion layer. Or do you mean how do the electrons get up to the inversion layer when it's in a non-conductive material? I'm not 100% sure of that one, but I believe the electrons can be pulled from the source and drain or even pulled through the less-than-ideally conductive depletion layer.
Amazing explanation
Great video! I just don't understand one thing, what controls the gate voltage? Because in order to translate the open or closed state of the transistor into Boolean algebra, you have to constantly change the gate voltage, so I wanted to know how this was achieved.
Thank Nathan! The gate voltage is manually (or externally) controlled by something else. From that vague phrase, you can extrapolate out to either an external source (if you're messing with a discrete MOSFET directly with a power supply) or another part of the circuit (like a flip-flop further up the line in an integrated circuit).
From a digital logic/boolean perspective, you don't normally worry about the gate voltage (or the different operating modes) of the FET, you simply focus on whether or not the FET is "open" or "closed".
The great thing with depletion mode is that you can just connect transistors in many ways and it just works. Look at the weird CMOS gates which are in use in any modern computer.
Great Video, thanks a lot
will doing this with gluons and quarks give warp tech ?
is antimatter needed ? how does one control subst? particles ´´without the risk öff igniting more aka the höle atmö^^
Eureka moment at 1:04
Thanks you, sir, this video actually usefull.😄😄😄
Most welcome 😊
Very nice video. Thank you. :)
2:03 I am pretty sure this is incorrect. Saturation region is when Vgs > Vth but Vds > (Vgs-Vth). Saturation region is when the inversion layer is already formed and there is current but increasing Vds has no effect on carrier velocity (current). Fight me!
We did a tutorial on just this topic here: www.circuitbread.com/tutorials/what-are-the-different-regions-of-operation-for-a-fet I'm a bit confused, though, as I agree with you. I think the confusion, in this video at that point, we're talking about changing Vgs and assuming Vds is constant, whereas when we're looking at graphs, it's usually Vds on the x-axis that is changing. Taking more time to give a more complete view, we created the other tutorial so please check it out and let me know if we're still supposedly in disagreement.
Also, TH-cam doesn't notify me of follow-up comments, so I may be more unresponsive in the future. Don't take it personally!
@@CircuitBread Ok. I suppose if Vgs is still below Vth at that point in the video, then there's no conduction through the channel and there's channel pinching, but textbooks don't seem to call this saturation region yet (CMOS VLSI Design, 4th Ed., Pg. 62-63). They let Vgs > Vth so that there's current between D S. Then they increase Vds such that drain's depletion region widens and pinches the inversion layer, however there's still drift current happening and the elections in the depletion region are accelerated due to drain's attraction. In your case, there's no current in the saturation region and that seems to be the troublesome thing. Do you see what I mean? Textbooks go: cut off, linear, and saturation (where there's current in saturation).
I see what you mean, for it to be in saturation, there has to be a Vds voltage, which would cause a current to flow (perhaps not significant but there would be a current). As technically, if Vds is 0, it will be in cut-off no matter what Vgs is. I'm sorry, this can definitely be confusing.
This is the problem with us trying to only briefly review this idea - I'm not sure if we should have left the operating regions alone completely in this video and just referred people to the other tutorial dedicated to the topic. I feel that one does a significantly better job explaining this particular concept.
Amazing Video 11/10
Thanks!!
Nice video but one question. Isn't 2:12 a triode region and 2:34 a saturation region?
This always confused me and is why we created this tutorial specifically: www.circuitbread.com/tutorials/what-are-the-different-regions-of-operation-for-a-fet It gets into more detail on the different operating regions. Hopefully it will clarify things!