Version 4.1
SHEET 1 1192 852
WIRE -96 48 -256 48
WIRE 0 48 -96 48
WIRE 256 48 0 48
WIRE -256 80 -256 48
WIRE 256 80 256 48
WIRE 0 112 0 48
WIRE 256 176 256 160
WIRE 256 192 256 176
WIRE 0 208 0 176
WIRE -256 240 -256 160
WIRE 256 304 256 272
WIRE 256 320 256 304
WIRE -256 336 -256 320
WIRE 208 608 64 608
WIRE 64 672 64 608
WIRE 208 672 208 608
WIRE 64 800 64 752
WIRE 208 800 208 752
WIRE 208 800 64 800
FLAG 432 192 0
FLAG 432 112 cont1
FLAG -208 96 cont1
FLAG -208 144 0
FLAG 256 416 0
FLAG 208 400 cont2
FLAG 432 400 0
FLAG 432 320 cont2
FLAG -256 336 0
FLAG 0 208 0
FLAG 256 176 V1
FLAG 256 304 V2
FLAG -96 48 condensador
SYMBOL voltage -256 224 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value {V}
SYMBOL sw -256 176 R180
SYMATTR InstName S1
SYMBOL voltage 432 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 37 35 Left 2
WINDOW 3 35 70 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 10 0 1n 1n {toff_sw} {tsim})
SYMBOL cap -16 112 R0
SYMATTR InstName C1
SYMATTR Value {C}
SYMBOL nmos 208 320 R0
SYMATTR InstName M1
SYMATTR Value IRFZ44N
SYMBOL voltage 432 304 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 39 33 Left 2
WINDOW 3 39 73 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 15 {ton_mos} 1n 1n {delta} {tsim})
SYMBOL ind 240 176 R0
SYMATTR InstName L1
SYMATTR Value {L}
SYMBOL res 240 64 R0
SYMATTR InstName R1
SYMATTR Value {R}
SYMBOL voltage 64 656 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value 30
SYMBOL res 192 656 R0
SYMATTR InstName R2
SYMATTR Value 20
TEXT -320 -16 Left 2 !.tran 0 {tsim} 0 
TEXT -320 -48 Left 2 !.Model SW SW(Ron=1m Roff=100Meg Vt = 5)
TEXT -320 -176 Left 2 !.param tsim 1.6m
TEXT -320 -144 Left 2 !.param toff_sw 1m
TEXT -320 -112 Left 2 !.param ton_mos 1.5m
TEXT 336 -96 Left 2 !.param R 10
TEXT 336 -160 Left 2 !.param C 0.02
TEXT 336 -128 Left 2 !.param L 1
TEXT 336 -64 Left 2 !.param V 30
TEXT -320 -80 Left 2 !.param delta tsim-ton_mos