Version 4 SHEET 1 1016 680 WIRE 80 128 32 128 WIRE 192 128 160 128 WIRE 32 224 32 128 WIRE 64 224 32 224 WIRE 192 224 192 128 WIRE 192 224 176 224 WIRE 224 224 192 224 WIRE 320 224 288 224 WIRE 368 224 320 224 WIRE 480 224 480 176 WIRE 480 224 432 224 WIRE 592 224 480 224 WIRE -80 240 -80 192 WIRE 320 256 320 224 WIRE 592 256 592 224 WIRE 32 272 32 224 WIRE 480 272 480 224 WIRE -80 368 -80 320 WIRE 32 368 32 336 WIRE 320 368 320 320 WIRE 480 368 480 336 WIRE 592 368 592 336 FLAG 480 176 out IOPIN 480 176 Out FLAG -80 368 0 FLAG -80 192 VCC FLAG 592 368 0 FLAG 32 368 0 FLAG 320 368 0 FLAG 480 368 0 SYMBOL 74hc14 112 176 R0 SYMATTR InstName U1 SYMBOL res 64 144 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 10K SYMBOL cap 16 336 M180 WINDOW 0 24 64 Left 0 WINDOW 3 24 8 Left 0 SYMATTR InstName C1 SYMATTR Value 10n SYMBOL cap 224 240 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C2 SYMATTR Value 22µ SYMBOL cap 464 272 R0 SYMATTR InstName C3 SYMATTR Value 22µ SYMBOL voltage -80 224 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL diode 304 256 R0 WINDOW 3 25 71 Left 0 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL diode 432 208 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL res 576 240 R0 SYMATTR InstName R2 SYMATTR Value 1e6 TEXT -96 40 Left 0 !.include 74hc.lib TEXT -96 -64 Left 0 !.tran 0 0.1 0 100n TEXT -88 -8 Left 0 !.ic V(out)=0 TEXT 152 -48 Left 0 ;1. Reset any convergence setting\nControl Panel -> SPICE : Reset to Default \n2. Either use ".ic V(out)=0" or add this 1meg resistor to the output. RECTANGLE Normal 672 416 528 160 RECTANGLE Normal 96 16 -128 -32