I have a strange problem:
I run stb analysis for my circuit (opamp buffer) for all corners. I found for some corners my phase plot start at 0 instead of 180 degree, while the location for the poles are still correct, so I can still have correct PM.
Has somebody also experienced same thing? and what is the cause?
I've seen this, I don't understand why, so I don't trust the tool.
I do not have the same problem with the same circuit using the
more primitive methods (a vcvs to "sniff" vin(diff), calculator
plot the mag out/in and phase out-in).
I've seen this, I don't understand why, so I don't trust the tool.
I do not have the same problem with the same circuit using the
more primitive methods (a vcvs to "sniff" vin(diff), calculator
plot the mag out/in and phase out-in).