Version 4
SHEET 1 880 680
WIRE -304 16 -400 16
WIRE -304 32 -304 16
WIRE -400 48 -400 16
WIRE 32 48 0 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 -400 144 -400 128
WIRE -160 160 -160 144
WIRE 32 160 0 160
WIRE 256 160 224 160
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 -304 256 -304 128
WIRE -224 256 -224 224
WIRE 256 256 256 224
WIRE -400 272 -400 256
WIRE -400 368 -400 352
WIRE -304 368 -304 336
WIRE -224 368 -224 336
WIRE 256 368 256 336
FLAG -400 256 VCC
FLAG -160 64 VCC
FLAG -160 160 0
FLAG -400 368 0
FLAG -400 144 0
FLAG 0 160 VCC
FLAG 0 64 0
FLAG 256 160 VCC
FLAG -304 368 0
FLAG -224 368 0
FLAG 256 368 0
SYMBOL Optos\\IL300 128 144 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1722 -160 48 R0
WINDOW 3 -40 153 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 100
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 -400 256 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 InstName V2
SYMATTR Value SINE(2.5 2.5 10)
SYMBOL cap -112 128 R0
SYMATTR InstName C1
SYMATTR Value 22p
TEXT 16 280 Left 2 !.tran 500mS