Synchronous input rectifier for 45w load

[amitesh43]

i was trying to design a sychronous bridge rectifier. i started like instead of replacing all the 4 diodes at
a time in the circuit,only 2 of them are replaced by mosfets and remaining 2 are diodes.while simulating
i was seeing some unwanted current peaks are coming can anyone explain y they are coming and is their
any solution for avoiding them i am attaching circuit related pics.....?

INPUT Voltage=155Vp-p
LOAD 45w

 

[FvM]

The current peaks look like simulation artefacts, to be avoided by adding medium or high ohmic resistors between "floating" (= only connected through semiconductors) nodes and ground and adjusting transient analysis settings.

 

[amitesh43]

u mean i needed to connect a resistor in between source and ground?
i tryed with transient settings but no changes