Version 4
SHEET 1 1200 1172
WIRE 400 -208 400 -240
WIRE 512 -208 512 -240
WIRE 400 -96 400 -128
WIRE 512 -96 512 -128
WIRE 32 -16 -48 -16
WIRE 96 -16 32 -16
WIRE 224 -16 176 -16
WIRE -48 16 -48 -16
WIRE 224 16 224 -16
WIRE 224 32 224 16
WIRE -48 112 -48 80
WIRE 224 128 224 112
WIRE 128 176 128 144
WIRE 32 192 32 -16
WIRE 96 192 32 192
WIRE 224 208 224 128
WIRE 224 208 160 208
WIRE 288 208 224 208
WIRE 320 208 288 208
WIRE 480 208 400 208
WIRE 544 208 480 208
WIRE -112 224 -304 224
WIRE 96 224 -32 224
WIRE 480 240 480 208
WIRE -304 256 -304 224
WIRE 128 272 128 240
WIRE 480 320 480 304
WIRE -304 352 -304 336
FLAG 512 -96 0
FLAG -304 352 0
FLAG 544 208 out
IOPIN 544 208 Out
FLAG 400 -96 0
FLAG -304 224 in
FLAG 128 144 V+
FLAG 128 272 V-
FLAG 400 -240 V-
FLAG 512 -240 V+
FLAG 480 320 0
FLAG 224 16 x
FLAG 224 128 y
FLAG -48 112 0
DATAFLAG 288 208 "round($*10k)/10k"
SYMBOL voltage 512 -224 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage 400 -224 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL res -16 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL voltage 224 16 R0
WINDOW 3 30 92 Left 2
WINDOW 123 30 120 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value 0
SYMATTR Value2 AC 1
SYMATTR InstName V4
SYMBOL res 192 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Opamps\\opamp2 128 144 R0
SYMATTR InstName U1
SYMATTR Value TL074
SYMBOL cap 464 240 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL res 304 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value {RX}
SYMBOL voltage -304 240 R0
WINDOW 3 30 92 Left 2
WINDOW 123 30 120 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 10 0 1n 1n 1m 2m)
SYMATTR InstName V3
SYMBOL cap -64 16 R0
SYMATTR InstName CIN
SYMATTR Value 5p
TEXT -392 -264 Left 2 ;.tran 0 2m 0 0.1u
TEXT -392 -352 Left 2 !.lib TL074.301
TEXT 48 -408 Left 2 ;The TL074 uses the universal symbol "opamp2" from\nthe standard LTSPICE [Opamps] menue. Simply\nplace this "opamp2" on the schematic. Then replace\nthe text "opamp2" with TL074. Don't forget to set the\nmodel path with\n.include TL074.301
TEXT -392 -304 Left 2 !.options plotwinsize=0
TEXT -392 -224 Left 2 !.ac dec 100 1k 10Meg
TEXT -392 -184 Left 2 !.step param RX list 0.1 5 30 100