Version 4
SHEET 1 880 680
WIRE 16 -16 -176 -16
WIRE 128 -16 96 -16
WIRE 160 -16 128 -16
WIRE 272 -16 240 -16
WIRE -176 0 -176 -16
WIRE -176 96 -176 80
WIRE 192 112 192 96
WIRE 160 128 32 128
WIRE 32 144 32 128
WIRE 272 144 272 -16
WIRE 272 144 224 144
WIRE 304 144 272 144
WIRE 128 160 128 -16
WIRE 160 160 128 160
WIRE 192 192 192 176
WIRE 32 240 32 224
WIRE -176 304 -176 288
WIRE -64 304 -64 288
WIRE -176 400 -176 384
WIRE -64 400 -64 384
FLAG 32 240 0
FLAG -176 96 0
FLAG 192 96 Uap
FLAG 192 192 Uam
FLAG -176 400 0
FLAG -64 400 0
FLAG -176 288 Uap
FLAG -64 288 Uam
FLAG 32 128 Uv
FLAG -176 -16 Ue
FLAG 304 144 out
SYMBOL Opamps\\UniversalOpamp2 192 144 R0
SYMATTR InstName U1
SYMBOL Misc\\EuropeanResistor 256 -32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 50k
SYMBOL Misc\\EuropeanResistor 112 -32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 28 57 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL voltage 32 128 R0
SYMATTR InstName V1
SYMATTR Value 1.25
SYMBOL voltage -176 -16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PWL(0 0 10m 2 20m 0)
SYMBOL voltage -176 288 R0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL voltage -64 288 R0
SYMATTR InstName V4
SYMATTR Value 0
TEXT -200 -168 Left 2 !.tran 0 20m 0 10u
TEXT -200 -328 Left 2 ;Schaltschwelle Ue1=1,5V  Ue2=0,5V\nAusgangsspannung Opamp/Komparator Uap und Uam, hier 5V und 0V.\n \nR2 = R1*(Uap-Uam)/(Ue1-Ue2)\nUv = Ue1*R2/(R1+R2) + Uam*R1/(R1+R2)
TEXT 144 -88 Left 2 ;100k||100k