[SOLVED] Why the time phase is -180 all the time in my folded cascode op-amp?

[paramis]

Hi all,I design a folded cascod op-amp that work good but all time phase is -180 why?
supply voltage=3.3
dc gain=200
input common mode voltage=0.8v-1.8v
differential loads=2pf each
UGW=1.5Ghz
process:0.35u

 

[FvM]

Re: problem about phase -180

Hi all,I design a folded cascod op-amp that work good but all time phase is -180 why?

Some confusion about amplifier phase already lighted up in your previous thread, but couldn't be clarified. https://www.edaboard.com/threads/261106/

I think it's time to see a circuit and know how you are measuring the phase respectively closing the feedback path.

 

[godfreyl]

Re: problem about phase -180

...but all time phase is -180 why?

Phase of what where?
We don't know what your circuit looks like and we don't know what you're measuring.