Dear N!4k!, Thank you for your help. I try to use that component but it only produce 0 or 1 and give non-zero output (1) only when two inputs are of opposite signs. I got confuse when it produce 1 but there is no opposite sign between these two input as shown at the below. You can check at t= 1.514.
I try to use another component called "Phase Difference". But I don't how it calculate and produce the phase angle difference signal. I try to calculate manually using the formula given but it didn't give the same answer.
The formula I used as follow.
I'm really hope that you can help me to solve this problem. Thank you very much