Version 4
SHEET 1 880 680
WIRE 416 -32 384 -32
WIRE 512 -32 480 -32
WIRE -304 16 -400 16
WIRE -304 32 -304 16
WIRE -768 48 -768 32
WIRE -688 48 -688 32
WIRE -400 48 -400 16
WIRE 32 48 0 48
WIRE 384 48 384 -32
WIRE 400 48 384 48
WIRE 512 48 512 -32
WIRE 512 48 480 48
WIRE 0 64 0 48
WIRE -160 80 -160 64
WIRE -192 96 -224 96
WIRE -96 112 -128 112
WIRE -80 112 -96 112
WIRE 32 112 0 112
WIRE -304 128 -304 112
WIRE -192 128 -304 128
WIRE -96 128 -96 112
WIRE -768 144 -768 128
WIRE -688 144 -688 128
WIRE -400 144 -400 128
WIRE -160 160 -160 144
WIRE 32 160 0 160
WIRE 256 160 224 160
WIRE 448 176 448 160
WIRE 384 192 384 48
WIRE 416 192 384 192
WIRE 512 208 512 48
WIRE 512 208 480 208
WIRE 544 208 512 208
WIRE -224 224 -224 96
WIRE -96 224 -96 192
WIRE -96 224 -224 224
WIRE 32 224 -96 224
WIRE 256 224 224 224
WIRE 416 224 256 224
WIRE -304 256 -304 128
WIRE -224 256 -224 224
WIRE 256 256 256 224
WIRE 384 256 384 192
WIRE 448 272 448 240
WIRE -304 368 -304 336
WIRE -224 368 -224 336
WIRE 256 368 256 336
WIRE 384 368 384 336
WIRE -224 464 -224 448
WIRE 384 464 384 448
FLAG -688 32 VCC
FLAG -160 64 VCC
FLAG -688 144 0
FLAG -400 144 0
FLAG 0 160 VCC
FLAG 0 64 0
FLAG 256 160 VCC
FLAG -304 368 0
FLAG 256 368 0
FLAG 448 160 VCC
FLAG 448 272 VEE
FLAG 544 208 OUT
FLAG -768 144 0
FLAG -768 32 VEE
FLAG -224 464 0
FLAG 384 464 0
FLAG -160 160 VEE
SYMBOL Optos\\IL300 128 144 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1722 -160 48 R0
WINDOW 3 19 31 Left 2
WINDOW 0 20 3 Left 2
SYMATTR InstName U2
SYMBOL res 16 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 200
SYMBOL res -240 240 R0
SYMATTR InstName R2
SYMATTR Value 30K
SYMBOL res 240 240 R0
SYMATTR InstName R3
SYMATTR Value 30K
SYMBOL res -320 240 R0
SYMATTR InstName R4
SYMATTR Value 30K
SYMBOL res -320 16 R0
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL voltage -688 32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -400 32 R0
WINDOW 3 -225 54 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(1.5 1.5 10)
SYMATTR InstName V2
SYMBOL cap -112 128 R0
SYMATTR InstName C1
SYMATTR Value 22p
SYMBOL res 496 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 30K
SYMBOL res 400 352 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R10
SYMATTR Value 30K
SYMBOL Opamps\\LT1722 448 144 R0
SYMATTR InstName U3
SYMBOL voltage -768 144 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL voltage -224 352 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 0
SYMBOL voltage 384 352 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value 0
SYMBOL cap 480 -48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 22p
TEXT 16 280 Left 2 !.tran 500mS