Version 4
SHEET 1 1168 680
WIRE 1072 -96 1008 -96
WIRE 800 -80 576 -80
WIRE 1008 -64 1008 -96
WIRE 960 -48 896 -48
WIRE 576 0 576 -80
WIRE 608 0 576 0
WIRE 864 0 768 0
WIRE 896 0 896 -48
WIRE 896 0 864 0
WIRE 960 32 960 0
WIRE 1008 32 1008 16
WIRE 144 48 32 48
WIRE 208 48 144 48
WIRE 448 48 352 48
WIRE 608 48 512 48
WIRE 800 48 800 -80
WIRE 800 48 784 48
WIRE 864 48 800 48
WIRE 896 48 864 48
WIRE 32 64 32 48
WIRE 1072 80 1008 80
WIRE 384 112 352 112
WIRE 1008 112 1008 80
WIRE 896 128 896 48
WIRE 960 128 896 128
WIRE 32 176 32 144
WIRE 960 208 960 176
WIRE 1008 208 1008 192
FLAG 32 176 0
FLAG 864 0 q
FLAG 864 48 _q
FLAG 144 48 fm
FLAG 1008 32 0
FLAG 960 32 0
FLAG 960 208 0
FLAG 1008 208 0
FLAG 1072 -96 q1
FLAG 1072 80 q2
SYMBOL voltage 32 48 R0
SYMATTR InstName V1
SYMATTR Value 1
SYMBOL SpecialFunctions\\modulate2 208 48 R0
WINDOW 39 -29 133 Left 2
SYMATTR SpiceLine space=0 mark=100k
SYMATTR InstName A1
SYMBOL Digital\\schmtbuf 448 -16 R0
WINDOW 39 -27 114 Left 2
WINDOW 40 -27 142 Left 2
SYMATTR SpiceLine Vt=0. Vh=1m
SYMATTR SpiceLine2 tripdt=1n
SYMATTR InstName A2
SYMBOL Digital\\dflop 688 -48 R0
WINDOW 39 -86 178 Left 2
WINDOW 40 -83 209 Left 2
SYMATTR SpiceLine Ref=0.5 Vhigh=1
SYMATTR SpiceLine2 Td=5n
SYMATTR InstName A3
SYMBOL e 1008 -80 R0
SYMATTR InstName E1
SYMATTR Value 12
SYMBOL e 1008 96 R0
SYMATTR InstName E2
SYMATTR Value 12
TEXT 176 216 Left 2 ;100kHz/Volt
TEXT 16 -144 Left 2 !.tran 40u
TEXT 176 248 Left 2 ;freq = space + Vfm*(mark-space)
TEXT 232 -152 Left 4 ;fq = Fvco/2