Version 4
SHEET 1 880 680
WIRE 160 32 80 32
WIRE 304 32 240 32
WIRE 80 80 80 32
WIRE 304 80 304 32
WIRE 80 192 80 160
WIRE 176 256 80 256
WIRE 304 256 304 160
WIRE 304 256 240 256
WIRE 352 256 304 256
WIRE 528 256 416 256
WIRE 80 304 80 256
WIRE 528 304 528 256
WIRE 80 416 80 384
WIRE 528 448 528 384
WIRE 80 544 80 496
FLAG 80 192 0
FLAG 528 448 0
FLAG 80 544 0
SYMBOL voltage 80 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 10V
SYMBOL res 256 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 500
SYMBOL ind 288 64 R0
WINDOW 39 36 108 Left 2
SYMATTR InstName L1
SYMATTR Value 100u
SYMATTR SpiceLine Rser=0.1
SYMBOL cap 176 272 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 0.1u
SYMBOL diode 352 272 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL res 96 400 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL res 544 400 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 50
SYMBOL voltage 80 400 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 -3.5 10n 0.1n 1000n)
TEXT 48 584 Left 2 !.tran 0 100n 0 1n