Hello everyone, first thank you for reading my post.

I have a problem, I am trying to characterize a fully differential miller opamp. However, although the design is completely symmetrical, the operating point of one of the branches is different from the other and I don't understand why. In the following image you can see what I mean:



Due to this asymmetry the common mode control circuit is not working well. Any idea or suggestion is welcome.

Edit: Excuse me, I already found the error, I had the bulk of a badly connected transistor