Version 4
SHEET 1 1224 680
WIRE 80 -160 -160 -160
WIRE 160 -160 80 -160
WIRE 224 -160 160 -160
WIRE 736 -160 224 -160
WIRE 864 -128 576 -128
WIRE 80 -16 80 -160
WIRE 160 -16 160 -160
WIRE 224 -16 224 -160
WIRE 576 0 576 -128
WIRE 736 96 736 -160
WIRE 576 112 576 80
WIRE 704 112 576 112
WIRE 864 128 864 -128
WIRE 864 128 768 128
WIRE 896 128 864 128
WIRE 80 144 80 64
WIRE 160 144 160 48
WIRE 160 144 80 144
WIRE 224 144 224 64
WIRE 224 144 160 144
WIRE 704 144 224 144
WIRE 576 224 576 112
WIRE 80 352 80 144
WIRE -160 368 -160 -160
WIRE 576 400 576 304
WIRE 736 400 736 160
WIRE 736 400 576 400
WIRE -160 512 -160 448
WIRE 80 512 80 416
WIRE 736 512 736 400
FLAG 80 512 0
FLAG 736 512 0
FLAG -160 512 0
FLAG 896 128 out
SYMBOL voltage -160 352 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL current 80 -16 R0
WINDOW 0 -59 40 Left 2
WINDOW 3 -256 583 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value PWL(.1 10p .90000 10m .90001 10p .90020 10p .90021 10m .90080 10m .900801 10p .900802 10p .900904 10m)
SYMBOL diode 64 352 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL res 560 -16 R0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 560 208 R0
SYMATTR InstName R2
SYMATTR Value 240k
SYMBOL diode 176 48 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMBOL res 208 -32 R0
SYMATTR InstName R3
SYMATTR Value 1G
SYMBOL Opamps\\AD822 736 64 R0
SYMATTR InstName U2
TEXT -176 600 Left 2 !.tran 1
TEXT 288 168 Right 2 ;Photodiode
RECTANGLE Normal 304 192 0 -48 1