Version 4
SHEET 1 880 680
WIRE 0 -16 -80 -16
WIRE 160 -16 64 -16
WIRE 368 -16 240 -16
WIRE 432 -16 368 -16
WIRE 368 64 368 -16
WIRE 160 112 112 112
WIRE 272 112 240 112
WIRE -80 208 -80 -16
WIRE -80 208 -144 208
WIRE -16 208 -80 208
WIRE 112 208 112 112
WIRE 112 208 64 208
WIRE 160 208 112 208
WIRE 272 224 272 112
WIRE 272 224 224 224
WIRE 368 224 368 144
WIRE 368 224 272 224
WIRE 160 240 112 240
WIRE -144 256 -144 208
WIRE 112 256 112 240
WIRE -144 368 -144 336
WIRE 112 368 112 336
FLAG 112 368 0
FLAG -144 368 0
FLAG 432 -16 Ua
FLAG -144 208 Ue
SYMBOL Misc\\EuropeanResistor 80 192 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 15k
SYMBOL Misc\\EuropeanResistor 256 96 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 15k
SYMBOL Misc\\EuropeanResistor 256 -32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 330
SYMBOL Misc\\EuropeanResistor 352 48 R0
WINDOW 3 29 98 Left 2
SYMATTR InstName RPOT
SYMATTR Value {RP +1m}
SYMBOL Opamps\\opamp 192 160 R0
SYMATTR InstName U1
SYMBOL Misc\\EuropeanResistor 96 240 R0
SYMATTR InstName R5
SYMATTR Value 15k
SYMBOL voltage -144 240 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 64 -32 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 384 48 Left 2 ;10k Pot
LINE Normal 400 128 336 80
LINE Normal 400 128 400 128 2
LINE Normal 352 80 336 80
LINE Normal 336 96 336 80