#### keiichi451

##### Newbie level 4

**how to interprete bode plots**

Here is the situation...

I have 4 pole, 2 zero open-loop system. The phase margin is greater than 0 due to the placement of the zeros. However, there are points where the phase goes beyond -180 degrees due to the higher number of poles. Is this system stable when place in closed-loop feedback?

I believe the answer is no, because for some points... gain > 1 and a phase shift of -180 in conjuction with negative feedback will yield positive feedback.

Please advise. Thanks in advance.