Version 4
SHEET 1 880 680
WIRE 384 0 320 0
WIRE 48 48 16 48
WIRE 160 48 128 48
WIRE 176 48 160 48
WIRE 16 64 16 48
WIRE 320 96 320 0
WIRE 320 96 208 96
WIRE 384 112 384 80
WIRE 208 128 208 96
WIRE 160 144 160 48
WIRE 176 144 160 144
WIRE 256 160 256 48
WIRE 256 160 240 160
WIRE 288 160 256 160
WIRE 416 160 368 160
WIRE 480 160 416 160
WIRE 0 176 -80 176
WIRE 96 176 80 176
WIRE 176 176 96 176
WIRE -80 208 -80 176
WIRE 480 240 480 160
WIRE 96 256 96 176
WIRE 112 256 96 256
WIRE 416 256 416 160
WIRE 416 256 192 256
WIRE 208 288 208 192
WIRE -80 320 -80 288
WIRE 480 352 480 320
WIRE 208 400 208 368
FLAG 480 352 0
FLAG 16 64 0
FLAG 208 400 0
FLAG 384 112 0
FLAG -80 320 0
SYMBOL Opamps\\UniversalOpamp2 208 160 R0
SYMATTR InstName U1
SYMATTR SpiceLine ilimit=1000m rail=0 Vos=0 phimargin=45
SYMBOL res 384 144 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 12.5
SYMBOL res 208 240 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 96 160 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 272 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL res 144 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res 464 224 R0
SYMATTR InstName R6
SYMATTR Value 50
SYMBOL voltage -80 192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 2.5V
SYMBOL voltage 384 -16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 15V
SYMBOL voltage 208 384 R180
WINDOW 0 36 46 Left 0
WINDOW 3 24 16 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 15V
TEXT -114 424 Left 0 !.tran 1 startup