Version 4
SHEET 1 880 680
WIRE 240 -48 112 -48
WIRE 368 -48 240 -48
WIRE 656 -48 368 -48
WIRE 160 48 -32 48
WIRE -112 64 -256 64
WIRE -32 64 -32 48
WIRE 336 64 304 64
WIRE 480 64 416 64
WIRE 112 112 112 -48
WIRE -256 128 -256 64
WIRE 80 128 -256 128
WIRE 368 128 368 -48
WIRE 160 144 160 48
WIRE 160 144 144 144
WIRE 208 144 160 144
WIRE 304 144 304 64
WIRE 304 144 288 144
WIRE 336 144 304 144
WIRE 368 144 368 128
WIRE 80 160 -112 160
WIRE 480 160 480 64
WIRE 480 160 400 160
WIRE 528 160 480 160
WIRE 336 176 288 176
WIRE 656 192 656 -48
WIRE 112 208 112 176
WIRE 368 208 368 192
WIRE 368 208 112 208
WIRE 112 224 112 208
WIRE 288 272 288 176
WIRE 656 272 368 272
WIRE -112 288 -112 160
FLAG -112 368 0
FLAG 112 304 0
FLAG 240 32 0
FLAG -256 208 0
FLAG 288 352 0
FLAG 656 352 0
SYMBOL res 432 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res 304 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL res -16 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL voltage 240 -64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3.3V
SYMBOL voltage -112 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 -0.177 0.5 0 0 90)
SYMBOL voltage 112 208 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value -3.3
SYMBOL res -272 112 R0
SYMATTR InstName R5
SYMATTR Value 43K
SYMBOL Opamps\\LT1012 368 96 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1012 112 80 R0
SYMATTR InstName U2
SYMBOL res 384 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL res 304 368 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R6
SYMATTR Value 10K
SYMBOL res 640 176 R0
SYMATTR InstName R7
SYMATTR Value 27K
SYMBOL res 640 256 R0
SYMATTR InstName R8
SYMATTR Value 27K
TEXT -280 328 Left 2 !.tran 1
TEXT -832 -56 Left 2 ;V2 = PH de 10 a 4 si SINE(0 -0.177 0.5 0 0 90)