Version 4
SHEET 1 880 680
WIRE -80 192 -80 128
WIRE -80 272 -80 192
WIRE -80 352 -80 336
WIRE -64 128 -80 128
WIRE -48 192 -80 192
WIRE 48 128 16 128
WIRE 80 192 64 192
WIRE 80 192 80 160
WIRE 128 128 112 128
WIRE 128 192 80 192
WIRE 128 192 128 128
WIRE 144 192 128 192
FLAG -80 352 0
FLAG 144 192 out
IOPIN 144 192 Out
SYMBOL Dig_Add\\CD4xxx\\cd40106b 0 144 R0
WINDOW 0 -51 34 Left 0
SYMATTR InstName U1
SYMATTR SpiceLine VDD={VDD}  SPEED=1.0  TRIPDT=5e-9
SYMBOL res 32 112 R90
WINDOW 0 1 96 VBottom 0
WINDOW 3 -27 50 VTop 0
SYMATTR InstName R1
SYMATTR Value 39K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL Pote 16 144 R270
WINDOW 0 -11 -10 VRight 0
WINDOW 123 75 29 VCenter 0
WINDOW 3 49 34 VCenter 0
SYMATTR InstName Freq
SYMATTR Value Rt=10k
SYMBOL cap -96 272 R0
WINDOW 0 -45 8 Left 0
WINDOW 3 -48 54 Left 0
SYMATTR InstName C1
SYMATTR Value 2n2
SYMATTR SpiceLine Rpar=1e8
TEXT -42 314 Left 0 !.tran 1m
TEXT -40 272 Left 0 !.param VDD=5