VDMOS p channel output m1 d g s p1 .model p1 vdmos pchan vto=-1.2 is=10n kp=2 bv=-12 rb=1k vd d 0 -5 vg g 0 -5 vs s 0 0 .dc vd -15 1 0.1 vg 0 -5 -1 .control run plot vs#branch .endc .end