MOSFET - Enhancement Type MOSFET Explained (Construction, Working and Characteristics Explained)
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- เผยแพร่เมื่อ 23 มี.ค. 2019
- In this video, the Enhancement-Type MOSFET, its Construction, Working and, drain and transfer Characteristics have been explained.
By watching this video you will learn the following topics.
0:24 Construction of Enhancement MOSFET
1:25 Working of Enhancement MOSFET and pinch-off Condition
8:08 Drain or Output Characteristic of Enhancement MOSFET
8:31 Different Regions of Operation (Saturation, Cut-off and Linear Region)
10:03 Transfer Characteristics of Enhancement MOSFET
11:03 p-channel Enhancement-Type MOSFET
12:54 Electronic Symbols of n-channel and p-channel Enhancement MOSFET
Enhancement-Type MOSFET?
The enhancement type MOSFET is similar to the Depletion-type MOSFET. It has three terminals (Drain, Gate, and Source)
But there is no conducting path/channel between the drain and the source terminal.
But by applying the control voltage between the gate and the source terminal, the channel is formed between the drain and the source terminal.
The required voltage to form this channel is known as the threshold voltage. And once the channel is formed then by applying the voltage Vds, current can flow through the device.
So, when there is no control voltage, then Enhancement MOSFET remains OFF.
And once the channel if formed then as voltage Vds increases, the current Id also increases.
But at particular voltage Vds (sat), the drain current Id gets saturated.
And it happens when the pinch-off condition occurs.
In the video, the pinch-off condition is explained in detail.
Different Regions of Operation:
The MOSFET can be operated in three regions.
1) Saturation or Active Region
2) Linear or Ohmic Region
3) Cut-off Region
The link for the other useful videos related to FET:
1) Introduction to Field Effect Transistor
• What is Field Effect T...
2) JFET Construction and Working Explained
• JFET: Construction and...
3) JFET Transfer Characteristics
• JFET Transfer Characte...
4) Depletion-Type MOSFET
• MOSFET- Depletion Type...
This video will be helpful to all the students of science and engineering in understanding the construction and working of Enhancement MOSFET.
The link for the other useful videos related to FET:
1) Introduction to Field Effect Transistor
• What is Field Effect T...
2) JFET Construction and Working Explained
• JFET: Construction and...
3) JFET Transfer Characteristics
• JFET Transfer Characte...
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The Timestamps for the different topics covered in the video:
0:24 Construction of Enhancement MOSFET
1:25 Working of Enhancement MOSFET and pinch-off Condition
8:08 Drain or Output Characteristic of Enhancement MOSFET
8:31 Different Regions of Operation (Saturation, Cut-off and Linear Region)
10:03 Transfer Characteristics of Enhancement MOSFET
11:03 p-channel Enhancement-Type MOSFET
12:54 Electronic Symbols of n-channel and p-channel Enhancement MOSFET
THANK YOU VERY MUCH
Video on IGBT please
Can u pls do a video on mosfet oxide tunneling
😘
thanks,studying one night before end sem
That's today for me😁
Me 2 😂😂
one day before exam ;D
Today me
same
You sir just saved my electronics exam, thank you so much.
Again, a nice conceptual explanation of a difficult subject. The enhancement type NFET is the most important transistor in IC design. I look at pinchoff as being due to opposing electric fields under the gate at the drain.
Great respect for your knowledge and insight. I benefitted from all your videos and please keep educating and you need our support.
Thank you
I'm so glad I found your channel my friend..!! you are great at explaining this subjects.
Thanks again..
greatings from Argentina..!!
Thank you so much! Best explanaion ever, incredible!
Lots of Information, with Clear explanation Very useful 👍thank you sir
thank you, best concise explanation
perfect explanation ... best I
found till now
superb tutorial dude....i'm count on you in my end exam...THANK YOUUUUU ...
Nice and compact. Thankyou sir!
Nice Explanation, firstly I had many doubt in this chapter , very helpful for me. thanks
How indians explain things better. You make it a piece of cake, easy.
Thank you indians.
(Your english style is funny)
Hi sir, how both depletion region formed between source and substrate then drain and substrate are reverse biased.since both subtrate and source are give negative supply
great explanation thank you very much
wow!..very clear..Thank You sir
Thank u VeRy Much i Cleared My EDC Subject........😇😇😇
thank u very much... keep uploading videos... lots of blessings to u
Best explaination. Thank you..
thank you. . you helped me to clear my doubt
Very well explained
Incredibly useful video, I learned a lot from it THANK YOU!!!
Thanks for the subtitles
Good explanation. Thank you Sir.
how both P-N junctions are reversed bias??
well explaind,thankyou
Excellent job. Thanks.
Studying 2 hours before the mid sem 😅
Nice ! Thank you so much !
Thank you sir.....well explained....
Hope you will upload such diagrammatic representation for every topics in electronics... especially based on MSc topics
Thank you bro it really helped me
great explanation go ahead brother.
Excellent video sir thanks
Thank you so much sir
Go ahead till you succeed n also take us with your such a good explanation
Best channel for learning electronics. Lot of thanks
U r voice is resounding
Well explained.. Gud
Fantastic video!
Can you add a video on MOSFET as an amplifier?
Yes sir you are right....
Nice 👍🏻👍🏻
Thanks a lot ❤❤
One night before test
Holy crap, this video save me
Awesome
New subscriber
Kindly next video explain slowly. I'm interested to listen to add knowledge how the transistor works.
Thank
George
I have a question: Why doesn't an inversion layer form on the channel of a depletion type mosfet when we polarize its gate like it were an enhancement one?
Pls upload more video
Ty sir❤
You explain well. But only thing you don't talk about is equations. Explain them too
4:32 how both terminals are reverse biased?
Sir plz make videos on bjt as switch and amplifier and feedback amplifier sir. Thank u 🙏🙏
Thank u sir
Sir plz explain about ujt also sir
Thank you
Can you please include videos about SMPS?!
Awesome explanation sir.! This video deserves a billion views.! I regret not watching this video earlier.! Sir if possible please upload a video on applications of jfet and MOSFET by today sir.! Please sir.. because we have exam tomorrow sir.! Please sir
Sir may i ask you something, do you prefer to read electronics books by Thomas FLOYD ?
Content is amazing ! Please keep it going :D
thank u sir
"Source Drain" naming is very confusing. I guess it refers to electron flow, not conventional current flow. I wish they had stuck to conventional current because the arrow is reversed and it's hard to remember whether the source or the drain is the positive or negative terminal.
I am studying this before 2 hr of exam
Could you post video on explaining IGBT?
Please make a video on IGBT
Video on IGBT
Sir..If the question is - write about p-channel MOSFET or if the question is -write about n-channel MOSFET ? Than what MOSFET should we write about ? Becoz both of these types exists in both DE MOSFET as well as in EN MOSFET ? Pls enlighten.
Where can I get the transcript of this lecture?
how direction of arrow is decided
Sir, Eco is there in video's please make it stable.. 👍🏻🙏🏻
Sir transconductance of mosfet directly. Proportional to drain current
Please explain
4:25
How are both pn junctions reverse biased sir ?
And what is the poalrity of source terminal here ! Because it is connected to ground and also to negative end of battery and substrate is also connected in similar manner !!!!
Kindly explain this sir !!!
Sir please make video on P channel MOSFET
Sir will make vedios on pseudo nmos inverter
Sir u r explain very well and u share more videos on diploma ECE 2 year.🙂
Thank you so much sir 🙏
Sir....do you cover BJT and JEFT frequency response...
Or...can you make a playlist for this topic...?
If you can do...then it will be very helpful for me...
It will be updated soon in the playlist.
😍👍
Mosfet stp20nm60 the number is not found, then which number should be applied
Sir, please provide the other lecture like darington pair, emitter ollower
Yes, very soon it will be covered.
4:37, How both junctions are reverse biased?
When Vds is applied, the drain is at a higher potential than the source and substrate. so, that PN junction will be reversed biased. On the source side, since both substrate and source are at the same potential, that PN junction is also reversed biased. I hope it will clear your doubt.
@@ALLABOUTELECTRONICS upper PN junction understood. But lower Junction , both source and substrate are at same potential right.
Yes, when both are the same potential then it is unbiased. But still, there will be a depletion region at the PN junction. Of course, at the drain side, the depletion region will be wider.
Sir it's not clear about source side
Will a junction be in reverse bias when both p and n are at same potential also ??@@ALLABOUTELECTRONICS
Please explain this sir!!
why do u never explain the concep fully?
how is the source and substrate reversed biased because source is at same potential to that of substrate
Yes, true. It will remain unbiased when source and substrate are at the same potential.
4:30 : Excuse me Sir, why both PN junctions are reverse biased? Thank You
The lower pn junction will remain unbiased if substrate is at the same potential as source.
❤
💗
What abt the third case when Vds
Nice class sir. Plz take transistors class also
Yes, it will be started from next week onwards.
Thank you sir
❤❤❤❤❤❤❤❤
Sir from 12:31 to 12:36 you say that if Vgs is greater then Vt then the mosfet will operate in cutt off region...No Sir if Vgs is less then Vt then it will operate in cutt off region I'm I right sir.........plzzzzz answer
If you closely observe, I am referring to P-type MOSFET. For, p-type MOSFET, Vgs will be negative. What you are saying is true for N-type MOSFET. I hope it will clear your doubt.
Sir, electrons are attracted towards gate because their is a insulated layer between gate and body.please answer my question
Imagine when you take two magnets. One under the table and one above the table. They both would still attract to each other. Thats because of Magnetic field. And here, its because of electromagnetic field.
thank you very much
please make ideo on cmos inverter
End sem se 4 ghante phle ...m kanhaiya voh Bhaiya 😢
What is the reference you teach us from?
You can refer, Electronic Devices And Circuits Theory By Robert L. Boylestad, Louis Nashelsky
This lecture was not clear to me as far as Vds, Vgs were explained.
Yes it is true that your explanation is far and far better than NESO ACADEMY as i study from both so this is my right to tell the truth.
If Vgd is decreasing then why there is decreasing in channel at drain side?
As drain voltage increases, the gate region on the drain side will become less positive. (Since drain voltage is increasing). Therefore, it will attract lesser electrons. And hence there is a reduction in the channel.
This mosfet schematic will not work in real. To have gate control you need to overlap gate electrode with some part of source and drain, and without that there's no gate control so mosfet won't work at all. Please correct!
Sir in saturation region there is no current is flowing from drain to source then how MOSFET is work as amplifier please explain
In saturation, actually the current is almost constant. On top of the biasing, when the small signal is applied to the MOSFET then it is getting amplified. I have already explained that in the separate video.
Please check this video:
th-cam.com/video/utBRWK4GmmE/w-d-xo.html
Further, you can check the MOSFET playlist for more information. Please go to the playlist section of the channel, you will get it.
@@ALLABOUTELECTRONICS thanks
Here Enhancement N-type MOSFET Gate biasing connection wrong. Gate voltage will be positive.