Version 4
SHEET 1 880 680
WIRE 272 -16 208 -16
WIRE 272 80 272 64
WIRE 176 144 144 144
WIRE 272 144 256 144
WIRE 208 176 208 -16
WIRE 48 192 -144 192
WIRE 64 192 48 192
WIRE 144 192 144 144
WIRE 176 192 144 192
WIRE 272 208 272 144
WIRE 272 208 240 208
WIRE 48 224 48 192
WIRE 176 224 128 224
WIRE 128 304 128 224
WIRE 128 304 48 304
FLAG 272 80 0
FLAG 208 240 0
FLAG -144 272 0
SYMBOL voltage 48 320 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 V1
SYMATTR Value 0
SYMBOL voltage -144 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 1.5
SYMBOL Opamps\\UniversalOpamp2 208 208 R0
SYMATTR InstName U1
SYMBOL voltage 272 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 3
SYMBOL res 160 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 272 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 9k
TEXT -96 376 Left 2 !.dc V1 -0.1 0.1 0.001