Greetings sir, Firstly thanks for the lecture series !!... I have one doubt at 21:13 as, why you have written a Negative sign to the charge ... could you please explain ... waiting for response, thank you
Professor has also incorporated the nature of the charge in the equation. As you will see further in the video, you will find that while finding the expression of Qi', he has only mentioned the magnitude and not the nature of the charge. That's why it wasn't apparent. If you drop the nature of the charge from your derivation, the process becomes very evident. But then you have to take care that you are using only the magnitude of the charges in the second case.
I have confusion, during pined potential sir says ns becomes equal to NA. Who it is possible in p type substrate holes are in majority and electrons are in minority and battery itself does not supply electrons. If due to potential minority electrons accumulate near surface how we can say that these minority electrons concentration becomes equal to majority holes in substrate
its a qualitative analysis....inversion charge is only created when Vgb>Vth.....forming a capacitor so charge =capacitance * potential difference....ie....-Cox(Vgb-Vth)...and the negative sign is due to nature of charge
Best IIT prof Ive come across
Where could I get the assignment questions and interconnect lectures?
Greetings sir, Firstly thanks for the lecture series !!... I have one doubt at 21:13 as, why you have written a Negative sign to the charge ...
could you please explain ...
waiting for response,
thank you
As there is minority charge carrier that is electron in this case and immobile Acceptor ions, both having negative charge. That's why
because....oxide inteface has become n type ....negativity charged.
Professor has also incorporated the nature of the charge in the equation.
As you will see further in the video, you will find that while finding the expression of Qi', he has only mentioned the magnitude and not the nature of the charge.
That's why it wasn't apparent.
If you drop the nature of the charge from your derivation, the process becomes very evident.
But then you have to take care that you are using only the magnitude of the charges in the second case.
I have confusion, during pined potential sir says ns becomes equal to NA. Who it is possible in p type substrate holes are in majority and electrons are in minority and battery itself does not supply electrons. If due to potential minority electrons accumulate near surface how we can say that these minority electrons concentration becomes equal to majority holes in substrate
how did u get Qi expression???
at 27:00
last step is really confusing 😏😑
The last Vth equation I am getting different
@@amalenduaman7239 yeah
@@amalenduaman7239 yes....W/L should also be there...then the equation satisfies
its a qualitative analysis....inversion charge is only created when Vgb>Vth.....forming a capacitor so charge =capacitance * potential difference....ie....-Cox(Vgb-Vth)...and the negative sign is due to nature of charge
where can I find the lecture slides?
drive.google.com/drive/folders/1UxrZOyjCY5fJz5O7xyAC3M8FwaoenUBp
@@balajimg382 bro plz add remaining lectures slide too
prev video recap 3:05