Hello, I have built a closed loop amplifier and tested the gain and phase from the output to the minus input AC=1v source.I got about 70 degrees phase at 0dB amplitude,as shown in the plot bellow.
Afterward i placed an idial current source in the feedback loop, and set STB simulation as shown bellow ,pointing the current source as probe instance.
When i ran the simulation it gives me an error shown bellow that phase marging could not been calculated.
Where did i go wrong setting STB simulation?
Thanks.
