Version 4
SHEET 1 880 680
WIRE -48 -16 -160 -16
WIRE 96 -16 32 -16
WIRE 144 -16 96 -16
WIRE 272 -16 224 -16
WIRE 336 -16 272 -16
WIRE -160 80 -160 -16
WIRE 96 80 96 -16
WIRE 144 80 96 80
WIRE 272 96 272 -16
WIRE 272 96 208 96
WIRE -160 112 -160 80
WIRE -48 112 -160 112
WIRE 96 112 16 112
WIRE 144 112 96 112
WIRE -160 128 -160 112
WIRE 96 176 96 112
WIRE -160 240 -160 208
WIRE 96 272 96 256
WIRE 96 384 96 352
FLAG 96 384 0
FLAG -160 240 0
FLAG 336 -16 Ua
FLAG -160 80 Ue
SYMBOL Misc\\EuropeanResistor 48 -32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 15k
SYMBOL Misc\\EuropeanResistor 240 -32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 15k
SYMBOL Misc\\EuropeanResistor 80 160 R0
WINDOW 3 29 98 Left 2
SYMATTR InstName RPOT
SYMATTR Value {RP +1m}
SYMBOL Opamps\\opamp 176 32 R0
SYMATTR InstName U1
SYMBOL Misc\\EuropeanResistor 80 256 R0
SYMATTR InstName R5
SYMATTR Value 500
SYMBOL voltage -160 112 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 0
SYMATTR Value2 AC 1
SYMBOL cap 16 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
TEXT -176 -160 Left 2 !.ac dec 100 20 20k
TEXT -176 -200 Left 2 !.lib opamp.sub
TEXT -176 -120 Left 2 !.step param RP list 0 500 1k 2k 5k 10k
TEXT 112 160 Left 2 ;10k Pot
LINE Normal 128 240 64 192
LINE Normal 128 240 128 240 2
LINE Normal 80 192 64 192
LINE Normal 64 208 64 192