Version 4 SHEET 1 1200 1172 WIRE -368 16 -368 -16 WIRE -368 112 -368 96 WIRE -224 -16 -368 -16 WIRE -112 -16 -160 -16 WIRE -112 224 -160 224 WIRE 32 -16 -32 -16 WIRE 32 -16 32 -128 WIRE 32 192 32 -16 WIRE 32 224 -32 224 WIRE 32 272 32 224 WIRE 32 384 32 352 WIRE 96 -128 32 -128 WIRE 96 -16 32 -16 WIRE 96 192 32 192 WIRE 96 224 32 224 WIRE 128 176 128 144 WIRE 128 272 128 240 WIRE 224 -128 160 -128 WIRE 224 -16 176 -16 WIRE 224 -16 224 -128 WIRE 224 208 160 208 WIRE 224 208 224 -16 WIRE 288 208 224 208 WIRE 384 -96 384 -128 WIRE 384 16 384 -16 FLAG 384 16 0 FLAG -368 112 0 FLAG 288 208 out IOPIN 288 208 Out FLAG -368 -16 in FLAG 128 144 V+ FLAG 384 -128 V+ FLAG 128 272 0 FLAG 32 384 0 FLAG -160 224 V+ SYMBOL voltage 384 -112 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL res -16 -32 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R2 SYMATTR Value 10k SYMBOL voltage -368 0 R0 WINDOW 3 -29 432 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PWL(0 0 100u 0 REPEAT FOREVER (.2u .1 250u .1 250.2u -0.1 500u -.1) ENDREPEAT SYMATTR InstName V3 SYMBOL cap 160 -144 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C1 SYMATTR Value 1p SYMBOL res 192 -32 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL opamp2 128 144 R0 SYMATTR InstName U1 SYMATTR Value LM324/NS SYMBOL res 16 256 R0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res -128 240 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R4 SYMATTR Value 15k SYMBOL cap -224 0 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C2 SYMATTR Value 1µ TEXT -442 -270 Left 0 !.tran 0 10m 0 .5u TEXT 256 128 Left 0 ;Universal Symbol \n"opamp2" used TEXT -128 -464 Left 0 ;LM324 from National Semiconductor\n \nThe LM324 is used with the universal symbol "opamp2" \nfrom the standard LTSPICE [Opamps] menue. Simply\nplace this symbol "opamp2" on the schematic. Then replace\nthe text "opamp2" with LM324/NS. Don't forget to \nset the model path with a Spiceline\n.include LM324.MOD\nKeep the model fle in the same directory where this schematic is saved. TEXT -440 -304 Left 0 !.options plotwinsize=0 TEXT -440 -392 Left 0 !.include LM324.MOD LINE Normal -464 48 -416 48 LINE Normal -464 432 -464 48 LINE Normal -416 432 -464 432