Version 4 SHEET 1 1200 1340 WIRE 96 -128 32 -128 WIRE 224 -128 160 -128 WIRE 384 -96 384 -128 WIRE -224 -16 -368 -16 WIRE -112 -16 -160 -16 WIRE 32 -16 32 -128 WIRE 32 -16 -32 -16 WIRE 96 -16 32 -16 WIRE 224 -16 224 -128 WIRE 224 -16 176 -16 WIRE -368 16 -368 -16 WIRE 384 16 384 -16 WIRE -368 112 -368 96 WIRE 128 176 128 144 WIRE 32 192 32 -16 WIRE 96 192 32 192 WIRE 224 208 224 -16 WIRE 224 208 160 208 WIRE 288 208 224 208 WIRE -112 224 -160 224 WIRE 32 224 -32 224 WIRE 96 224 32 224 WIRE 32 272 32 224 WIRE 128 272 128 240 WIRE 32 384 32 352 WIRE 128 784 128 752 WIRE -240 800 -288 800 WIRE -96 800 -160 800 WIRE 96 800 -96 800 WIRE 240 816 160 816 WIRE 288 816 240 816 WIRE -96 832 -96 800 WIRE 96 832 48 832 WIRE 128 880 128 848 WIRE -96 944 -96 912 WIRE 48 976 48 832 WIRE 112 976 48 976 WIRE 240 976 240 816 WIRE 240 976 176 976 WIRE -208 1088 -240 1088 WIRE -96 1088 -144 1088 WIRE 48 1088 48 976 WIRE 48 1088 -16 1088 WIRE 112 1088 48 1088 WIRE 240 1088 240 976 WIRE 240 1088 192 1088 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+ FLAG 288 816 out2 IOPIN 288 816 Out FLAG 128 752 V+ FLAG 128 880 0 FLAG -96 944 0 FLAG -288 800 V+ FLAG -240 1088 in SYMBOL voltage 384 -112 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL res -16 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 10k SYMBOL voltage -368 0 R0 WINDOW 3 -29 432 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 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 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 1p SYMBOL res 192 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 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 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R4 SYMATTR Value 15k SYMBOL cap -224 0 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL res 0 1072 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 10k SYMBOL cap 176 960 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 1p SYMBOL res 208 1072 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 100k SYMBOL res -112 816 R0 SYMATTR InstName R7 SYMATTR Value 10k SYMBOL res -256 816 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R8 SYMATTR Value 15k SYMBOL cap -208 1104 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C4 SYMATTR Value 1µ SYMBOL opamp2i 128 752 R0 WINDOW 0 20 -5 Left 2 WINDOW 3 18 25 Left 2 SYMATTR InstName U2 SYMATTR Value LM324/NS TEXT -464 -288 Left 2 !.tran 0 10m 0 .5u TEXT 256 128 Left 2 ;Universal Symbol \n"opamp2" used TEXT -128 -464 Left 2 ;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.lib LM324.MOD or .inc LM324.MOD\nKeep the model fle in the same directory where this schematic is saved. TEXT -464 -320 Left 2 !.options plotwinsize=0 TEXT -464 -408 Left 2 !.lib LM324.MOD TEXT 64 656 Left 2 ;Universal Symbol \n"opamp2i" used TEXT -352 544 Left 2 ;Copy the symbol "opamp2i" into your schematic directory.\nWhen you want add this symbol, then set "Top Directory" to your schematic path.\nNow you can select amy symbol of your schematic directory, e.g. "opamp2i". LINE Normal -464 48 -416 48 LINE Normal -464 432 -464 48 LINE Normal -416 432 -464 432