Version 4
SHEET 1 880 680
WIRE 608 -80 192 -80
WIRE 608 32 608 -80
WIRE 160 80 128 80
WIRE 304 80 240 80
WIRE 0 112 -80 112
WIRE 128 112 128 80
WIRE 128 112 80 112
WIRE -80 144 -80 112
WIRE 192 160 192 -80
WIRE 128 176 128 112
WIRE 160 176 128 176
WIRE 608 176 608 112
WIRE 800 176 608 176
WIRE 304 192 304 80
WIRE 304 192 224 192
WIRE 0 208 -176 208
WIRE 112 208 80 208
WIRE 160 208 112 208
WIRE 800 224 800 176
WIRE 608 256 608 176
WIRE -176 304 -176 208
WIRE 112 320 112 208
WIRE 160 320 112 320
WIRE 304 320 304 192
WIRE 304 320 240 320
WIRE 112 384 112 320
WIRE -176 464 -176 384
WIRE 192 464 192 224
WIRE 608 464 608 336
WIRE 608 464 192 464
WIRE 112 512 112 464
FLAG -80 144 0
FLAG 112 512 0
FLAG -176 464 0
FLAG 800 224 0
SYMBOL res 96 368 R0
SYMATTR InstName R5
SYMATTR Value 27
SYMBOL res 96 96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 250
SYMBOL res 256 64 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 250
SYMBOL res 96 192 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 250
SYMBOL res 256 304 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 250
SYMBOL voltage -176 288 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL Opamps\\LT1001 192 128 R0
SYMATTR InstName U1
SYMBOL voltage 608 16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage 608 240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 15
TEXT -210 536 Left 0 !.tran 1E-4