Version 4
SHEET 1 1320 680
WIRE 832 80 784 80
WIRE 960 80 912 80
WIRE 672 192 576 192
WIRE 784 192 784 80
WIRE 784 192 752 192
WIRE 832 192 784 192
WIRE 960 208 960 80
WIRE 960 208 896 208
WIRE 992 208 960 208
WIRE 832 224 752 224
WIRE 576 256 576 192
WIRE 752 272 752 224
WIRE 576 416 576 336
WIRE 752 416 752 352
WIRE 752 416 576 416
WIRE 992 416 752 416
WIRE 752 448 752 416
FLAG 752 448 0
FLAG 992 208 A
SYMBOL voltage 576 240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL res 768 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 4k
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 voltage 752 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 4
TEXT 1104 504 Left 2 !.lib opamp.sub
TEXT 1104 568 Left 2 !.tran 1000