Version 4
SHEET 1 980 680
WIRE 672 96 608 96
WIRE 752 96 672 96
WIRE 912 96 832 96
WIRE 160 112 -48 112
WIRE 352 112 160 112
WIRE 528 112 528 96
WIRE 528 112 352 112
WIRE 352 128 352 112
WIRE 912 128 912 96
WIRE 672 144 672 96
WIRE -48 160 -48 112
WIRE 160 240 160 192
WIRE 160 240 -48 240
WIRE 352 240 352 192
WIRE 352 240 160 240
WIRE 592 240 592 224
WIRE 592 240 352 240
WIRE 672 240 672 224
WIRE 672 240 592 240
WIRE 816 240 816 224
WIRE 816 240 672 240
WIRE 912 240 912 208
WIRE 912 240 816 240
WIRE 672 256 672 240
FLAG 672 256 0
FLAG 544 144 0
FLAG 352 96 vc
FLAG 768 144 0
DATAFLAG 352 112 ""
SYMBOL cap 336 128 R0
SYMATTR InstName C1
SYMATTR Value 1.4n
SYMATTR SpiceLine V=0
SYMBOL sw 512 96 R270
SYMATTR InstName S2
SYMBOL res 144 96 R0
SYMATTR InstName R1
SYMATTR Value 1000
SYMBOL res 656 128 R0
SYMATTR InstName R3
SYMATTR Value 1000
SYMBOL res 896 112 R0
SYMATTR InstName R4
SYMATTR Value 500
SYMBOL sw 736 96 R270
SYMATTR InstName S1
SYMBOL voltage 816 128 R0
WINDOW 3 -77 -124 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(-1 1 18u)
SYMATTR InstName V1
SYMBOL current -48 240 R180
WINDOW 0 24 88 Left 0
WINDOW 3 24 0 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value PULSE(0 2m 0)
SYMBOL voltage 592 128 R0
WINDOW 3 -77 -124 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(-1 1 12u)
SYMATTR InstName V2
TEXT -32 296 Left 0 !.tran 0 34us 0u 1n startup
TEXT -264 80 Left 0 !.model SW SW()