Version 4
SHEET 1 880 680
WIRE -16 32 -32 32
WIRE -32 48 -32 32
WIRE 320 128 304 128
WIRE 304 144 304 128
WIRE -32 160 -32 128
WIRE 240 160 -32 160
WIRE 272 160 240 160
WIRE 368 176 336 176
WIRE 384 176 368 176
WIRE -32 192 -32 160
WIRE 272 192 208 192
WIRE -32 288 -32 272
WIRE 80 352 -32 352
WIRE 208 352 208 192
WIRE 208 352 160 352
WIRE 240 352 208 352
WIRE 368 352 368 176
WIRE 368 352 320 352
WIRE -32 384 -32 352
WIRE 128 448 112 448
WIRE 112 464 112 448
FLAG 112 544 0
FLAG 112 448 VCC
FLAG 304 128 VCC
FLAG 304 208 0
FLAG -32 464 0
FLAG -32 32 VCC
FLAG -32 288 0
FLAG 224 464 R
FLAG 224 544 0
FLAG 384 176 OUT
IOPIN 384 176 Out
FLAG 240 160 IN
SYMBOL voltage 112 448 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5V
SYMBOL Opamps\\UniversalOpamp2 304 176 R0
SYMATTR InstName U1
SYMBOL res 176 336 R90
WINDOW 0 5 56 VBottom 0
WINDOW 3 27 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 336 336 R90
WINDOW 0 5 56 VBottom 0
WINDOW 3 27 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL voltage -32 368 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 2.5V
SYMBOL res -48 32 R0
SYMATTR InstName R3
SYMATTR Value R=9.9k*V(R)+100
SYMBOL res -48 176 R0
SYMATTR InstName R4
SYMATTR Value R=10k-9.9k*V(R)
SYMBOL voltage 224 448 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0V 1V 0 1s 1s 0)
TEXT 360 504 Left 0 !.tran 0 2s 0