at 49:00 he gives two examples of the pince of voltage i agree with his second one of Vgs= -2 and Vds=1 when Vp=3. but his first example is that Vgs=-1 and Vds=-2 when Vp=3. i love this lecturer just a bit confused.
@thecurioussoul88 he said - to maintain isolation. so there is no flow of electrons or holes with everything. only some material (substrate) maybe. i am not sure. and this substrate shoud not go above positive, if it does, there wont be isolation. this is what i understood. dont know if it correct or not
Looks like for whatever reason first half of this lecture overlaps with previous lecture (video no 26). Not sure what is the reason for overlap. am I missing something?
When saturation current occurs the current becomes constant at a fixed value of Ids, refer to Lecture - 26 Metal Oxide Semiconductor 46:30. Current is still flowing from the source but not through the drain due to the fact that Vds is greater than Vgs-Vt hence the channel at Vd gets pinched of. Once again refer to the above title Lecture 26 to understand the relationship between Ids and Vds.
I didnt clearly understand ..when channel is pinched off ,,how we still get a saturation current. As, the channel from where electrons flows is blocked from where this saturation current still exist?
leoricgurung When MOSFET pinched off, a very less current still flows due to high voltage(or high field intensity) applied at the drain end. You can better understand by the logic that we can pass the current through a insulator material by applying a proper high Voltage. In the same manner as we are applying 15 volt(highest DC volatge for MOS usually) at the drain end there must be a current.
The current is maintained due to the voltage at pinch off.. There is like oscillation in the pinch off voltage drop, so Vgs keeps puliing the electrons, increasing the depth of channel, while Vds keeps drawing, when it draws electron, when electrons leaves that pinch off region, there is no electrons now... But due to small cuttof at that point, electric field due to Vds is apparent like passing thru insulator... So now Vgs again in action, pulls out electrons, from source and again, channel widens... This process goes on at very fast frequency.
Samarpan Saraswat For making proper biasing. You can keep normal BJT transistor in mind for making connection but have a little bit different approach.
UN BUEN VIDEO PERO POR FAVOR PARA TODO LATINOAMERICA Y ESPECIALMENTE PARA PERU SERA BUENO QUE ESTE SUB-TITULADO AL ESPAÑOL GRACIASSSSSSSS A GOOD VIDEO BUT PLEASE FOR ALL LATIN AMERICA AND PERU WILL BE GOOD ESPECIALLY FOR THIS SUB-TITLED THE SPANISH GRACIASSSSSSSS
Studying for my Electronic Circuits1 Exam, Very Helpful...
Good Job Dr.Rao!
now I don't hate electronics anymore:)
Simple and Clear Explanation, Thank you sir
i was searching 4 D-MOSFET explanation 4m last 3days n i got dis....feeling lucky ..
thank you very much sir for sharing this intense knowledge with us...
really gr8 apporoach by u sir thanks alot.
at 49:00 he gives two examples of the pince of voltage i agree with his second one of Vgs= -2 and Vds=1 when Vp=3. but his first example is that Vgs=-1 and Vds=-2 when Vp=3. i love this lecturer just a bit confused.
@thecurioussoul88
he said - to maintain isolation. so there is no flow of electrons or holes with everything. only some material (substrate) maybe. i am not sure. and this substrate shoud not go above positive, if it does, there wont be isolation. this is what i understood. dont know if it correct or not
Looks like for whatever reason first half of this lecture overlaps with previous lecture (video no 26). Not sure what is the reason for overlap. am I missing something?
excellent......................
Thank y sir
What a good lecture! thank you very much
Great lecture...keep up the good work.
nicelly explained!!! gud effort sir
Thank you so much.
35:50 ....Is this correct symbol of p channel????
Great!!
thank u very much sir...
Thank you very much sir
thank you sir
When saturation current occurs the current becomes constant at a fixed value of Ids, refer to Lecture - 26 Metal Oxide Semiconductor 46:30. Current is still flowing from the source but not through the drain due to the fact that Vds is greater than Vgs-Vt hence the channel at Vd gets pinched of. Once again refer to the above title Lecture 26 to understand the relationship between Ids and Vds.
Current still flowing from source and drain pinch off occur but due to electric field it is still sucking the electrones ..
wow!
What happened if we replace pmos with nmos & nmos with pmos in inverter???
damn, that guy makes some straight lines
That's it, i'm subscribing this shit!! Gd stuffs
I didnt clearly understand ..when channel is pinched off ,,how we still get a saturation current. As, the channel from where electrons flows is blocked from where this saturation current still exist?
leoricgurung When MOSFET pinched off, a very less current still flows due to high voltage(or high field intensity) applied at the drain end. You can better understand by the logic that we can pass the current through a insulator material by applying a proper high Voltage. In the same manner as we are applying 15 volt(highest DC volatge for MOS usually) at the drain end there must be a current.
The current is maintained due to the voltage at pinch off.. There is like oscillation in the pinch off voltage drop, so Vgs keeps puliing the electrons, increasing the depth of channel, while Vds keeps drawing, when it draws electron, when electrons leaves that pinch off region, there is no electrons now... But due to small cuttof at that point, electric field due to Vds is apparent like passing thru insulator... So now Vgs again in action, pulls out electrons, from source and again, channel widens... This process goes on at very fast frequency.
Can anybody explain why substrate is connected to most negative bias? I didnt understand it.
Samarpan Saraswat For making proper biasing. You can keep normal BJT transistor in mind for making connection but have a little bit different approach.
How you can form the channel then?
yo tmb soy peruano... a aprender caballero nomás usted.
UN BUEN VIDEO PERO POR FAVOR PARA TODO LATINOAMERICA Y ESPECIALMENTE PARA PERU SERA BUENO QUE ESTE SUB-TITULADO AL ESPAÑOL GRACIASSSSSSSS
A GOOD VIDEO BUT PLEASE FOR ALL LATIN AMERICA AND PERU WILL BE GOOD ESPECIALLY FOR THIS SUB-TITLED THE SPANISH GRACIASSSSSSSS
Borat says Wa wa wi wa
@rxgvhqkrywq6cxdjoar2 Indeed. Ur name is also amazing. How do you pronounce it. . .
7 people prefer Diodes
what is yan he is saying? dont understand :(
It's "n" not "yan". English is our second language.
Yam =m, yal=L, yan=n
😀😀
Oh Lord!!! Help me
What a bad teacher ! Ok?Ok Ok?Ok
Suggest me good one
thank you sir