How to Understand MOSFET Symbols | Intermediate Electronics
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- Опубликовано: 11 май 2024
- I don't know if it is just me or what, but MOSFET symbols have always been confusing. So, we systematically broke down the different parts of a MOSFET symbol and brought meaning to each part so that, fingers crossed, it is easier to know what each symbol stands for and, as is always important, WHY. If you want to understand MOSFET symbols better, well, you're in the right spot.
We recommend a quick refresher discussing the different types of MOSFETS: www.circuitbread.com/tutorial...
And if you want to see the written tutorial this was based on, go check it out here: www.circuitbread.com/tutorial...
Chapters!
0:00 Intro, why this tutorial is needed
1:21 First MOSFET Symbols - IEEE Shorthand version of a MOSFET symbol
1:34 NMOS and PMOS and Depletion vs Enhancement
1:59 Shorthand notation
4:58 Substrate MOSFET symbols
7:45 Ignoring the substrate MOSFET symbols
9:47 Summary
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Hi all! The tutorial mentioned about understanding the different types of MOSFETs is here: www.circuitbread.com/tutorials/nmos-vs-pmos-and-enhancement-vs-depletion-mode-mosfets And if you want to see the written tutorial that doesn't use Josh's horrendous handwriting, go check it out here: www.circuitbread.com/tutorials/how-to-read-a-mosfet-symbol Enjoy!
Fun point: The base connection to the drain/source is indicated by the arrow. What about those where base appear and there is an arrow: I suppose this comes handy for comparison operations with the base level
In the case of the PMOS, the substrate is connected to the drain.
Really good explanations. I struggled to find a person to explain this tiny confusing differences between depletion and enhancement types. You did it so well and I am very thankful for your effort! Keep it going!
In my end semester exams, 15 days left and this is what I wanted to see! ♥️ Thank you so much
Good luck with your exams, Muhammad!
Arrows indicate directions of electrons, not of the current (which is by convention direction in which positive charge moves)
Thank you, I was confused by the video.
You certainly know what confuses people and explain it. Thank you
Thank u so much your explanation is the simplest to understand from keep on going
Helpful and good insight to remember
Wow, really nice video! Many thanks!
I just wanted to know about this topic, suddenly you uploaded this video!!!
Awesome timing!!
Good and clear explanation 👍
Thank you!
Thanks for your great video, you really deserve more views!
Thank you!
These patterns had been a pain in my ass before watching this vid. Thanks, it makes a lot more sence now
Not gonna lie, we're working on another video and I had to come back to this as a refresher to make sure I remembered everything correctly!
Very informative Thanks!
Thank you for explanation
Thanks a bunch for a great explanation!
Our pleasure, I'm glad it was helpful!
This video was incredibly helpful!
Glad it was helpful!
Very useful. Thank You.
Glad it was helpful!
On the last sets of symbols, is the arrow head on all the source leg of the symbol?
Why doesn't AND or OR gate doesn't work in realty for CMOS?
Ad có thể làm thêm video về CMOS không?
Tnx for the tutorials on this channel, they realy helpd me out! Can you show us how to make a animatronic control system. It would realy help me out in building my own animatronic show.
That sounds awesome! I admit, one of the biggest challenges we’ve had with this channel is there are just so many things we can do. We’re trying to mix in some practical projects as well (they’re in development now) and this sounds like a great one, but honestly, I’m just not sure when we’d be able to get to it... 🤔
It would realy help me out. I am struggeling for 2,5 uears now to make a controller. The most difficult part is het saving of shows. I am working to getter with a other animatronic fan to start a business, but without a control system to do every thing you dont come far. Exuse me for my bad english
Hey Aron, the struggle is good in that it teaches us so much! I'm sorry, I didn't understand the sentence, "The most difficult part is het saving of shows." but if control systems are a challenge, even if you're already familiar with them, I recommend Kushal's control systems series that he's working on, they're very well written and clear. And he's much farther ahead in the written tutorials than I am with the videos, so go check it out here: www.circuitbread.com/tutorials/introduction-to-control-systems-1.1
@@CircuitBread the sentance meand: the most dificult part is saving shows so you can play them later
Ah, gotcha, they can be a complex and use a lot of space - this is probably something where you'll need to save the data on an external source, EEPROM if you're lucky, or some sort of SD card reader.
No body junction diode?
牛逼 非常有帮助
So MOSFETs have different symbols depending on whether they are on or off but BJTs don't?
No, sorry if we mislead but the symbols for MOSFETs don't change either, whether they're on or off. We sometimes use artistic license to make things more intuitive.
@@CircuitBread Hey! Thanks for your reply. So what is enhancement mode then? I thought it just meant that the MOSFET was on.
Hey John, sorry for the delay. RUclips actually just implemented a way to see people when people have responded to a comment, so hopefully my responses won't take so long in the future. Enhancement mode is when the device does NOT conduct current when there is no driving voltage at the gate. This is unlike depletion mode devices that conduct current unless there is a driving voltage at the gate that turns them off. We did an entire tutorial on this, please check it out here: www.circuitbread.com/tutorials/nmos-vs-pmos-and-enhancement-vs-depletion-mode-mosfets
@@CircuitBread So is it just hysteresis? When an NMOS is in enhancement mode, it is off at 0V, then increasing the voltage turns it on and when you bring it back down to 0V it is still on and therefore in depletion mode? Then lowering the voltage further turns it off and when you bring it back to 0V it is still off and therefore in enhancement mode again?
@@CircuitBreadHi! I came back to this video to understand why the arrows are pointing in the direction they do in MOSFET symbols. I just thought I'd tell you that I understand the difference between enhancement and depletion mode now. The thing that was confusing me is that I didn't understand that they were physically different devices. It was the term 'mode' that misled me - calling them 'modes' sounds to me like any MOSFET can be in either enhancement or depletion mode, not that it's something inherent to the device.
Another thing I've learned today, which I've never heard anyone else point out even though it's very strange, is how the naming of the terminals in a BJT is not consistent with the naming of the terminals in a MOSFET. We call the collector in a BJT a collector because conventional current enters there, and we call the source in a MOSFET the source because electron flow enters there (at least in an N-channel MOSFET). Very confusing, no?
When you can’t draw straight line then I can’t get too nahhh 😂🤣then it add confusions and complicated 😅🤣😂 goodluck to me 🤪😜
😂