two stage op-amp - nmos or pmos input question

Status
Not open for further replies.
A

arunsomanathan

Newbie level 4
Joined
Jun 15, 2009
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,316
two stage op-amp

I was just wondering in a two stage opamp suppose the first stage is nmos input why do we always use pmos input in the second stage or vice-versa. Can't we use nmos or pmos input in both the stages.
 

two stage op-amp

"nmos input why do we always use pmos input in the second stage or vice-versa" the second input mirror the current of the first stage's output in DC point.
"Can't we use nmos or pmos input in both the stages." I never do it. maybe it work, but DC point setup is not easy. The input and output range may be limited. you can try and simulate it.
 
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…