Version 4
SHEET 1 1320 680
WIRE 832 80 784 80
WIRE 960 80 912 80
WIRE 384 96 240 96
WIRE 688 96 464 96
WIRE 240 128 240 96
WIRE 464 192 368 192
WIRE 688 192 688 96
WIRE 688 192 544 192
WIRE 784 192 784 80
WIRE 784 192 688 192
WIRE 832 192 784 192
WIRE 960 208 960 80
WIRE 960 208 896 208
WIRE 992 208 960 208
WIRE 368 224 368 192
WIRE 832 224 752 224
WIRE 240 240 240 208
WIRE 560 272 496 272
WIRE 688 272 688 192
WIRE 688 272 640 272
WIRE 752 272 752 224
WIRE 496 304 496 272
WIRE 368 336 368 304
WIRE 496 400 496 384
FLAG 752 272 0
FLAG 992 208 Vo
FLAG 240 240 0
FLAG 368 336 0
FLAG 496 400 0
SYMBOL res 928 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL Opamps\\opamp 864 144 R0
SYMATTR InstName U2
SYMBOL res 560 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 20k
SYMBOL res 656 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 40k
SYMBOL res 480 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL voltage 240 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 1
SYMBOL voltage 368 208 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 1
SYMBOL voltage 496 288 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 0
TEXT 824 280 Left 2 !.lib opamp.sub
TEXT 824 344 Left 2 !.tran 1000