in voltage mode buck convertor,err amp is ota or op-amp?

[sunoftech]

I think ,if I type compensation the err amp is ota.
II or III type compensation both ota or op-amp is ok? is it correct?

 

[shaq]

In my opinion, there are two methods for error amplifier design.
One is GM transconductor, another is OPA.

Hope it helps.

 

[harrytrinh]

I think that both OTA or OPAMP are OK. We only need to compensate to have good phase margin to have stable system.