Common mode feedback circuit

[ajetivarg]

Hi,


Can common mode feedback circuit correct the offset of a fully differential amplfier??

Till now, i thought it will correct the offset voltage, But when i am doing the simulations its not correcting the offset, its just setting the output common mode voltage.

please help.............

regards,

ravi.gajula

 

[FvM]

But when i am doing the simulations its not correcting the offset, its just setting the output common mode voltage.

As intended by design...
Offset is a differential signal. How should it be affected by common mode feedback?