Unusual gate pulses in LLC converter

[biswaIITH]

Hii ,

I am currently working on an LLC half bridge resonant converter for battery charger application.

Below are the gate pulse we captured on the scope.

Yellow one is for high side mosfet & green is for bottom side mosfet.

Any idea why is there a bump on high side pulse before it turns on.?????

 

[cupoftea]

Can you not feed it all by isolation AC source or isol txformer, and then read the signal with home brew coaxial probe?...beware probe capacitance though.

 

[biswaIITH]

Can you not feed it all by isolation AC source or isol txformer, and then read the signal with home brew coaxial probe?...beware probe capacitance though.

I have checked the gate pulse via two different differential probes. The top(Blue colored ) is with low CMRR & BW probe & bottom one is with high BW &CMRR probe

 

[mtwieg]

If the circuit is otherwise performing as expected, I think it's safe to assume the issues with the other waveforms were just probing artifacts.