Normally, there is a phase shift of -45deg at -3dB gain, however, in my circuit there is a +45 deg phase shift. I think it is due to the compensation cap in feedforward mode.
This give no phase margin.
Anyone knows how to compensation in this condition for phase margin?
If your comp cap is feeding more power forward than the
amplifier (?) then that's not a very good amplifier (or maybe
you are driving with an unrealistically stiff source). Usually
when I see a phase shift that doesn't make sense, it's due
to the amplifier being at a bad operating point and not working
as intended. Especially if you are going by small signal results
which are set up by operating point and can't overcome it
the way a transient simulation might.