Not related to any exam.
We were discussing among...
# analog-designa
Alok Kumar Pathak
03/22/2021, 1:11 PMNot related to any exam.
We were discussing among ourselves.
s
Siddharth Joshi
03/22/2021, 3:45 PMWell, let's work through it then, I'll pre-apologize if this sounds condescending, but that way, if it is a homework question we'll not be invalidating the purpose of the question :)
a) What's the DC gain of this amplifier
b) What is the square law?
We can talk about the next steps after this I guess 🙂
👍 1
a
Alok Kumar Pathak
03/22/2021, 4:00 PMa)gm1b.(ro1b||ro2b).
b)Id = 1/2uncoxW/L (Vgs-Vtn)^2(1+lamdaVds).
MOSFET follow this Id equation.
s
Siddharth Joshi
03/22/2021, 4:00 PMcool/ What's the equation for gm?
a
Alok Kumar Pathak
03/22/2021, 4:01 PMsqrt(2uncoxw/L.Id)
s
Siddharth Joshi
03/22/2021, 4:02 PMunder what assumptions is that the equation for gm ?
a
Alok Kumar Pathak
03/22/2021, 4:04 PMMOSFET follows square law.
s
Siddharth Joshi
03/22/2021, 4:05 PMwell, I guess that answers your question at least for DC gain. I think you can just follow the same line of reasoning for the other parameters
a
Alok Kumar Pathak
03/22/2021, 4:07 PMOk
m
Matthew Guthaus
03/22/2021, 5:22 PM@Siddharth Joshi thanks. I didn't mean to be condescending either, but it did sound like a homework problem 🙂
s
Siddharth Joshi
03/22/2021, 5:23 PM@Matthew Guthaus it 100% does sound like a homework problem, also, at least to me you didn't! That's also why I didn't provide an answer.