Version 4
SHEET 1 880 680
WIRE 496 -16 480 -16
WIRE 496 16 496 -16
WIRE 0 48 -64 48
WIRE 112 48 80 48
WIRE 208 48 112 48
WIRE 304 48 288 48
WIRE -64 80 -64 48
WIRE 192 128 192 -16
WIRE 112 144 112 48
WIRE 160 144 112 144
WIRE 304 160 304 48
WIRE 304 160 224 160
WIRE 320 160 304 160
WIRE 496 160 496 96
WIRE 576 160 496 160
WIRE -384 176 -384 112
WIRE -304 176 -304 112
WIRE -224 176 -224 112
WIRE -16 176 -64 176
WIRE 112 176 64 176
WIRE 160 176 112 176
WIRE 576 176 576 160
WIRE 496 224 496 160
WIRE -16 272 -64 272
WIRE 112 272 112 176
WIRE 112 272 64 272
WIRE -384 288 -384 256
WIRE -304 288 -304 256
WIRE -224 288 -224 256
WIRE 192 336 192 192
WIRE 496 336 496 304
WIRE 496 336 480 336
WIRE -16 368 -64 368
WIRE 112 368 112 272
WIRE 112 368 64 368
FLAG 576 176 0
FLAG 480 336 -12V
IOPIN 480 336 Out
FLAG 480 -16 +12V
IOPIN 480 -16 Out
FLAG 192 -16 +12V
IOPIN 192 -16 In
FLAG 192 336 -12V
IOPIN 192 336 In
FLAG 320 160 Output
IOPIN 320 160 Out
FLAG -64 368 Input3
IOPIN -64 368 In
FLAG -384 288 0
FLAG -384 112 Input1
IOPIN -384 112 Out
FLAG -64 272 Input2
IOPIN -64 272 In
FLAG -64 176 Input1
IOPIN -64 176 In
FLAG -304 288 0
FLAG -304 112 Input2
IOPIN -304 112 Out
FLAG -224 288 0
FLAG -224 112 Input3
IOPIN -224 112 Out
FLAG -64 80 0
SYMBOL Opamps\\LT1056 192 96 R0
SYMATTR InstName U1
SYMBOL voltage 496 0 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL voltage 496 208 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 12V
SYMBOL res 80 160 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 304 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 200k
SYMBOL voltage -384 160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -66 164 Left 0
SYMATTR Value SINE(0 1 100)
SYMATTR InstName V3
SYMBOL res 80 256 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 80 352 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL voltage -304 160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -70 204 Left 0
SYMATTR Value SINE(0 1 200)
SYMATTR InstName V4
SYMBOL voltage -224 160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -66 164 Left 0
SYMATTR Value SINE(0 1 300)
SYMATTR InstName V5
SYMBOL res 96 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 100k
TEXT -344 -48 Left 0 !.tran .025