pwm pspice

Hai I have generated PWM in PSPICE but iam getting +ve spike when iam comparing -ve cycle i want to eliminate the spike give me the solution. wave forms are attached

Could be many reasons. Use WinRAR to archive your design files incl a schematic diagram and upload here.

HAI
Thank u for your reply here i have attached my pspice file and my simulation result i have generated 3 phase pwm but i have one doubt if we are feeding the generated three phase pwm to inverter there may be a possibe of short circuit in leg A and B. i want to generate three phase PWM and hoe to fed it to inverter switches