How can I check if the Millers theorem is applicable?

Status
Not open for further replies.
H

Hackson

Junior Member level 1
Joined
Jun 11, 2004
Messages
15
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
188
Miller's theorem

How can I gurantee Miller's theorem is applicable. Razavi's book just states that it is not always applicable. So, when is it applicable and when is it not?
 

Miller's theorem

If there is only one path for signal, it's not applicable.
 

Re: Miller's theorem

That was just one case, according to razavi there cud many situations when miller theorem can not be used.
 

Re: Miller's theorem

It seems to me that every theorem is the form :
A=> B

so if B is that the impedance can be decomposed into two impedances connected to the ground, then what is A?
 

Re: Miller's theorem

find a mosfet basic article ,you can find it theory.
IR,Fairchild all have such application note.
 

Re: Miller's theorem

Maybe the limitation is the phase-frequiency response of the amp.
If the phase is not 180 deg,e.g. at HF,the formula is not exact.
 

Re: Miller's theorem

Hey buddies,

I've just found out that Miller theorem can be applied only when the impedance Z in interest doesn't cause any change to the gain between X and Y. That's why razavi says that if Z is not the main signal path, Miller's theorem can be applied.
 

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…