Version 4
SHEET 1 880 680
WIRE 496 -16 480 -16
WIRE 496 16 496 -16
WIRE 208 48 112 48
WIRE 304 48 288 48
WIRE 192 128 192 -16
WIRE -16 144 -64 144
WIRE 112 144 112 48
WIRE 112 144 64 144
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 160 176 112 176
WIRE 576 176 576 160
WIRE -144 192 -176 192
WIRE 112 224 112 176
WIRE 496 224 496 160
WIRE -176 256 -176 192
WIRE 192 336 192 192
WIRE 496 336 496 304
WIRE 496 336 480 336
WIRE -176 368 -176 336
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 -64 144 Input
IOPIN -64 144 In
FLAG -176 368 0
FLAG -144 192 Input
IOPIN -144 192 Out
FLAG 112 224 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 80 128 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 304 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 20k
SYMBOL voltage -176 240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(0 1 100)
TEXT -74 -64 Left 0 !.tran .025