Version 4
SHEET 1 3572 2464
WIRE 2032 1920 1968 1920
WIRE 2240 1920 2144 1920
WIRE 2352 1920 2240 1920
WIRE 1968 2032 1968 1920
WIRE 2048 2032 1968 2032
WIRE 2240 2032 2240 1920
WIRE 2240 2032 2128 2032
WIRE 2240 2048 2240 2032
WIRE 1968 2160 1968 2032
WIRE 2048 2160 1968 2160
WIRE 2240 2160 2240 2128
WIRE 2240 2160 2112 2160
WIRE 1968 2176 1968 2160
WIRE 2240 2176 2240 2160
FLAG 2240 2240 0
FLAG 1968 2240 0
FLAG 2352 1920 OUT
SYMBOL MISC\\XTAL 2048 2176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName Y1
SYMATTR Value {C}
SYMATTR SpiceLine Rser=50k Lser={L} Rpar=1e20 Cpar=1.35p
SYMBOL Misc\\EuropeanResistor 2144 2016 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10MEG
SYMBOL cap 2224 2176 R0
SYMATTR InstName C1
SYMATTR Value 30p
SYMBOL 74hct\\74hct04 2080 1856 R0
SYMATTR InstName U1
SYMATTR Value 74HC04
SYMBOL Misc\\EuropeanResistor 2256 2144 R180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R2
SYMATTR Value 300K
SYMBOL cap 1952 2176 R0
SYMATTR InstName C2
SYMATTR Value 30p
TEXT 1840 1592 Left 2 !.tran 0 10u 0 1u
TEXT 1840 1632 Left 2 !.options method=trap
TEXT 2152 1632 Left 2 !.param R=50k f0=32768 Q=70000\n.param w=2*pi*f0\n.param C = 1/(w*Q*R)\n.param L = C*(Q*R)**2
TEXT 1840 1560 Left 2 !.op
TEXT 1832 1672 Left 2 !.lib 74hc.lib