Version 4 SHEET 1 1488 680 WIRE -16 -32 -112 -32 WIRE 192 -32 -16 -32 WIRE 224 -32 192 -32 WIRE 320 -32 304 -32 WIRE -112 -16 -112 -32 WIRE -16 -16 -16 -32 WIRE 192 16 192 -32 WIRE 320 16 320 -32 WIRE -112 80 -112 64 WIRE -16 80 -16 64 WIRE 96 80 -16 80 WIRE 720 80 416 80 WIRE -16 96 -16 80 WIRE 720 96 720 80 WIRE 848 96 720 96 WIRE 720 112 720 96 WIRE 848 112 848 96 WIRE 1088 128 896 128 WIRE 1200 128 1168 128 WIRE -16 176 -16 160 WIRE 96 176 80 176 WIRE 528 176 416 176 WIRE 576 176 528 176 WIRE 656 176 640 176 WIRE 528 192 528 176 WIRE 720 208 720 176 WIRE 848 208 848 192 WIRE 848 208 720 208 WIRE 720 224 720 208 WIRE 80 272 80 176 WIRE 96 272 80 272 WIRE 448 272 416 272 WIRE 528 272 448 272 WIRE 448 288 448 272 WIRE 528 288 528 272 WIRE 0 368 -16 368 WIRE 96 368 80 368 WIRE 448 368 448 352 WIRE 448 368 416 368 WIRE 528 368 448 368 WIRE 528 384 528 368 WIRE 192 448 192 432 WIRE 320 448 320 432 WIRE 432 448 320 448 WIRE 320 464 320 448 WIRE 432 464 432 448 WIRE 528 480 528 464 WIRE 320 560 320 544 WIRE 432 560 432 528 FLAG 192 448 0 FLAG 320 560 0 FLAG 528 480 0 FLAG 720 224 0 FLAG -112 80 0 FLAG -16 368 0 FLAG 432 560 0 FLAG 656 176 0 FLAG 896 176 0 FLAG 1200 128 0 FLAG -16 176 0 SYMBOL PowerProducts\\LT3571 256 224 R0 SYMATTR InstName U1 SYMBOL ind 208 -16 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMBOL res 512 176 R0 SYMATTR InstName R1 SYMATTR Value 20 SYMBOL res 512 272 R0 SYMATTR InstName R2 SYMATTR Value 1Meg SYMBOL res 512 368 R0 SYMATTR InstName R3 SYMATTR Value 20.5K SYMBOL res 304 448 R0 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL cap 432 288 R0 SYMATTR InstName C1 SYMATTR Value 10p SYMBOL res 96 352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 12.1K SYMBOL voltage -112 -32 R0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL cap 416 464 R0 SYMATTR InstName C2 SYMATTR Value 10n SYMBOL cap 576 192 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C3 SYMATTR Value .1µ SYMBOL diode 704 176 M180 WINDOW 0 30 59 Left 2 WINDOW 3 33 -2 Left 2 SYMATTR InstName D1 SYMATTR Value APD SYMBOL g2 848 208 R180 WINDOW 0 -14 103 Right 2 WINDOW 3 -10 9 Right 2 SYMATTR InstName G1 SYMATTR Value 1m SYMBOL voltage 1072 128 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 -32 56 VBottom 2 WINDOW 123 -74 56 VBottom 2 WINDOW 39 -53 56 VBottom 2 SYMATTR InstName V2 SYMATTR Value PULSE(.5 1.5 22m 10u 10u .5m 1m) SYMBOL res -32 -32 R0 SYMATTR InstName R6 SYMATTR Value 100K SYMBOL cap -32 96 R0 SYMATTR InstName C4 SYMATTR Value 1µ TEXT 768 408 Left 2 !.tran 25m startup TEXT 648 272 Left 2 !.model APD D(Is=10n Cjo=10p)