hi nabaker,
thank you for your response. but I am not able to find the Multisim's models for my selected Mosfets from manufacturer's (i.e. Fairchild) site or national instruments site or anywhere else. I suppose some Multism programs they have model maker feature (but not mine) so you can enter data from component's datasheet and it will make the required model usable on multisim database.
I am still looking for a solution.
regards,