Version 4
SHEET 1 880 680
WIRE -240 -64 -288 -64
WIRE -176 -64 -192 -64
WIRE -144 -64 -176 -64
WIRE -64 -64 -144 -64
WIRE -288 0 -288 -64
WIRE -256 0 -288 0
WIRE -144 0 -144 -64
WIRE -144 0 -176 0
WIRE -288 112 -288 0
WIRE -256 112 -288 112
WIRE -144 112 -144 80
WIRE -144 112 -192 112
WIRE -288 176 -288 112
WIRE -144 176 -144 112
WIRE -224 240 -288 240
WIRE -144 240 -224 240
WIRE -224 288 -224 240
FLAG -224 288 0
SYMBOL Misc\\xtal -192 96 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value {C}
SYMATTR SpiceLine Rser=50k Lser={L} Rpar=1e20 Cpar=1.35
SYMBOL cap -304 176 R0
SYMATTR InstName C2
SYMATTR Value 22
SYMBOL cap -160 176 R0
SYMATTR InstName C3
SYMATTR Value 22
SYMBOL res -160 -16 R0
WINDOW 3 36 68 Left 0
SYMATTR Value 100k
SYMATTR InstName R1
SYMBOL Digital\\inv -240 -128 R0
SYMATTR InstName A1
SYMBOL res -160 -16 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 10meg
TEXT 224 -112 Left 0 !.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 -304 312 Left 0 !.tran 2