Version 4
SHEET 1 880 724
WIRE -128 0 -144 0
WIRE -144 16 -144 0
WIRE -48 240 -144 240
WIRE -32 240 -48 240
WIRE 128 240 96 240
WIRE 256 240 256 224
WIRE 256 240 208 240
WIRE 304 240 256 240
WIRE 416 240 384 240
WIRE -144 256 -144 240
WIRE -144 336 -144 320
WIRE -32 368 -32 240
WIRE 288 368 -32 368
WIRE -32 400 -32 368
WIRE 288 400 288 368
WIRE -80 496 -128 496
WIRE -32 496 -32 464
WIRE 96 496 96 240
WIRE 96 496 -32 496
WIRE 240 496 192 496
WIRE 288 496 288 464
WIRE 416 496 416 240
WIRE 416 496 288 496
WIRE -128 512 -128 496
WIRE -32 512 -32 496
WIRE 192 512 192 496
WIRE 288 512 288 496
WIRE -80 528 -80 496
WIRE 96 528 96 496
WIRE 240 528 240 496
WIRE 416 528 416 496
WIRE -128 608 -128 592
WIRE -80 608 -80 576
WIRE -80 608 -128 608
WIRE 192 608 192 592
WIRE 240 608 240 576
WIRE 240 608 192 608
WIRE -128 624 -128 608
WIRE -32 624 -32 592
WIRE 96 624 96 592
WIRE 96 624 -32 624
WIRE 192 624 192 608
WIRE 288 624 288 592
WIRE 416 624 416 592
WIRE 416 624 288 624
WIRE -32 640 -32 624
WIRE 288 640 288 624
FLAG -144 96 0
FLAG -128 0 vcc
FLAG 96 240 A+
FLAG 416 240 A-
FLAG 256 224 vcc
FLAG -128 624 0
FLAG -32 640 0
FLAG 192 624 0
FLAG 288 640 0
FLAG -48 240 comx
FLAG -144 336 0
SYMBOL voltage -144 0 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 112 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMATTR SpiceLine Rser=10m
SYMBOL sw -32 608 M180
SYMATTR InstName S1
SYMBOL schottky 112 592 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL voltage -128 496 R0
WINDOW 3 -12 202 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 0 1u 1u 500u 1m)
SYMBOL sw 288 608 M180
SYMATTR InstName S2
SYMBOL schottky 432 592 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL voltage 192 496 R0
WINDOW 3 -12 202 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 0
SYMBOL schottky -16 464 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 304 464 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL voltage -144 240 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 112 Left 2
SYMATTR InstName V4
SYMATTR Value 12
SYMATTR SpiceLine Rser=10m
SYMBOL ind2 224 256 M270
WINDOW 0 26 56 VTop 2
WINDOW 3 7 56 VBottom 2
WINDOW 39 -13 -18 VBottom 2
SYMATTR InstName L1
SYMATTR Value 10m
SYMATTR Type ind
SYMATTR SpiceLine Rser=1 Rpar=10k Cpar=100p
SYMBOL ind2 400 256 M270
WINDOW 0 26 56 VTop 2
WINDOW 3 7 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 10m
SYMATTR Type ind
SYMATTR SpiceLine Rser=1 Rpar=10k Cpar=100p
TEXT 152 296 Left 2 !K1 L1 L2 0.9
TEXT -160 -40 Left 2 !.model sw SW(Ron=.1 Roff=1Meg Vt=0.5 Vh=-.2 Lser=10n)
TEXT -160 -64 Left 2 !.tran 0 3m 0 1u startup