A question about Razavi's book

Status
Not open for further replies.

qiushidaren

Full Member level 2
Joined
Mar 21, 2006
Messages
149
Helped
4
Reputation
8
Reaction score
3
Trophy points
1,298
Location
BME??BFE
Activity points
2,426
I am analyzing the circuit in problem 2.6(c) of Razavi's book "Design of Analog CMOS Integrated Circuits", but I am confused about the conclusion in the solution manual, it says that the device turns off when Vx=2-Vth+R1I1.
But I think that once Vx is larger than 2-Vth, the device will always in saturation region, can someone explain this to me, whether the solution manual is wrong or I am wrong?
Thank you in advance!
 

I think the solution manual is right.Because the souce of M1 is becoming high as the Vx,and when it is up to 2-Vth,M1 will turn off, the current of Vx will flow into R1 which is equal to I1.At that time,the Vx=2-Vth+R1I1.
So do I.
Rgds,
longstar
 

longstar said:
I think the solution manual is right.Because the souce of M1 is becoming high as the Vx,and when it is up to 2-Vth,M1 will turn off, the current of Vx will flow into R1 which is equal to I1.At that time,the Vx=2-Vth+R1I1.
So do I.
Rgds,
longstar
Click to expand...
Thanks for your reply and explanation.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…