Version 4
SHEET 1 2828 1468
WIRE 256 400 112 400
WIRE 320 400 256 400
WIRE 112 448 112 400
WIRE 320 480 320 400
WIRE -32 528 -96 528
WIRE 64 528 -32 528
WIRE -96 560 -96 528
WIRE -96 672 -96 640
WIRE 112 672 112 544
WIRE 320 672 320 560
FLAG -96 672 0
FLAG 112 672 0
FLAG -32 528 gs
FLAG 256 400 d
FLAG 320 672 0
SYMBOL voltage -96 544 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vgate
SYMATTR Value {vgs}
SYMBOL voltage 320 464 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 15 108 Left 0
SYMATTR Value 20
SYMATTR InstName V1
SYMBOL NMOS 64 448 R0
SYMATTR InstName M1
SYMATTR Value STD5NM60
SYMATTR Prefix X
TEXT 464 464 Left 0 ;Id
TEXT 808 648 Left 0 ;Vgs >>>
TEXT -120 424 Left 0 ;symbol "nmos" \nwith PREFIX:X
TEXT -112 128 Left 0 !.step param Vgs 0 10 .01\n.step param VTO 4 5 .5\n*.step param LAMBDA 0 0.01 0.005
TEXT -120 760 Left 0 !.subckt STD5NM60 d1 g1 s1\n*.param VTO=4.5\n*.param LAMBDA=0.005\nLd d1 d 4.5n\nLs s1 s 7.5n\nLg g1 g 7.5n\nM1 d g s s STD5NM60\nDb s d dbody\n*\n.MODEL STD5NM60 VDMOS(KP=0.6864 RS=0.009 RD=0.6478 RG=4\n*+ VTO=4.5 CGDMAX=611p CGDMIN=5p CJO=1525p Vj=0.75 M=0.7995\n+ VTO={VTO} CGDMAX=611p CGDMIN=5p CJO=1525p Vj=0.75 M=0.7995\n*+ CGS=430p N=1 IS=1.00E-14 RB=0.1248 TT=432n LAMBDA=0.01)\n+ CGS=430p N=1 IS=1.00E-14 RB=0.1248 TT=432n LAMBDA={LAMBDA})\n*\n.model dbody d ron=0.1 vrev= 650 vfwd=2\n.ends
TEXT 792 456 Left 0 ;Vto >>>
TEXT -112 320 Left 0 !.op
TEXT 472 128 Left 0 ;This example demonstrates how a \nsubcircuit parameter can be directly \nstepped. This woks with any value\nof everey device in the subcircuit.\n \nThe threshold voltage parameter \nVto is stepped from 4V to 5V.\nWatch that the parameter Vto=4.5\nhas to be replaced by Vto={VTO}\nin the VDMOS model..
TEXT -112 256 Left 0 !.param VTO=4.5 ; nominal value\n.param LAMBDA=0.005 ; nominal value
TEXT 24 368 Left 0 ;Subcircuit Model
LINE Normal 504 624 504 448
LINE Normal 888 624 504 624
LINE Normal 624 624 512 624
LINE Normal 680 592 616 624
LINE Normal 712 592 648 624
LINE Normal 744 592 680 624
LINE Normal 744 544 680 592
LINE Normal 792 480 744 544
LINE Normal 776 544 712 592
LINE Normal 824 480 776 544
LINE Normal 808 544 744 592
LINE Normal 856 480 808 544