* SPICE netlist
A1 N004 0 N003 0 0 N004 N009 0 DFLOP Vhigh=5 Trise=50n Rout=30
A2 0 0 0 N007 N009 0 N005 0 AND Vhigh=5 Trise=50n Rout=30
A3 N004 N007 0 0 0 0 N011 0 AND Vhigh=5 Trise=50n Rout=30
A4 N003 N005 0 0 0 N008 0 0 OR Vhigh=5 Trise=300n Rout=30
A5 N003 N011 0 0 0 N013 0 0 OR Vhigh=5 Trise=300n Rout=30
G1 N001 et1 N008 G table=(1 0,4 250m)
G3 N012 et2 N013 G table=(1 0,4 250m)
A6 Na Nb 0 0 0 0 N003 0 OR Vhigh=5 Trise=50n Rout=30
A7 N002 Ct 0 0 0 0 Na 0 SCHMITT Vt=0 Vh=0 Vhigh=5
A8 Fb N014 0 0 0 0 Nb 0 SCHMITT Vt=0 Vh=0 Vhigh=5
V4 N014 Ct .7
V5 N002 Dtc .1
D1 N016 Fb Ideal
D2 N017 Fb Ideal
R1 In1 Nc 1e6
R2 In2 N010 1e6
C1 Nc -In1 15n9
C2 N010 -In2 15n9
D3 et1 N001 IdealZ
E1 N016 G Nc -In1 table=(0,0 1.96m,0 2m,2 2.04m,4 20m,4.5)
R3 G -In1 1e7
R4 In1 G 1e7
R5 In2 G 1e7
R6 -In2 G 1e6
I1 Fb G .7m
V2 N015 G 3.65
F1 G Ct V2 -1
S1 G Ct N006 G Osc
D4 Ct1 N001 Ideal1
D5 Ct1 N001 Ideal2
G2 et1 N001 Vcc et1 table=(0 250m,1.42 243m,1.46 150m,1.57 0)
D6 et2 N012 IdealZ
D7 Ct2 N012 Ideal1
D8 Ct2 N012 Ideal2
G4 et2 N012 Vcc et2 table=(0 250m,1.42 243m,1.46 150m,1.57 0)
C3 N001 et1 5p
C4 N012 et2 5p
D9 N015 Rt Ideal
R7 G Ct 1e7
R8 et2 G 1e7
R9 et1 G 1e7
G5 Vcc G Vcc G TABLE=(1 0,5 4.5m,6.85 7.6m,40 8.4m)
I2 G Vref 25m
D10 G Vref Ideal3
B1 Vcc G I=I(D10)+25m
R10 Oct N007 1k
R11 N006 Ct 5k
C5 G N006 10p
E2 N017 G N010 -In2 table=(0,0 1.96m,0 2m,2 2.04m,4 20m,4.5)

* LTspice schematic (.asc)
Version 4
SHEET 1 1632 464
WIRE 480 -200 400 -200
WIRE 592 -200 560 -200
WIRE 720 -200 656 -200
WIRE -640 -184 -816 -184
WIRE -544 -184 -576 -184
WIRE -368 -168 -400 -168
WIRE -320 -168 -368 -168
WIRE -672 -152 -736 -152
WIRE -640 -152 -672 -152
WIRE -368 -152 -368 -168
WIRE -320 -152 -320 -168
WIRE -208 -152 -272 -152
WIRE -160 -152 -208 -152
WIRE -144 -152 -160 -152
WIRE 352 -152 -32 -152
WIRE 480 -152 464 -152
WIRE 560 -152 544 -152
WIRE 592 -152 592 -200
WIRE 592 -152 560 -152
WIRE 608 -152 592 -152
WIRE 720 -152 720 -200
WIRE 720 -152 688 -152
WIRE 784 -152 720 -152
WIRE 816 -152 784 -152
WIRE -272 -136 -272 -152
WIRE 352 -136 352 -152
WIRE 368 -136 352 -136
WIRE -816 -120 -816 -184
WIRE -208 -120 -208 -152
WIRE 192 -120 -16 -120
WIRE 368 -120 320 -120
WIRE 720 -120 720 -152
WIRE 784 -120 784 -152
WIRE -672 -104 -672 -152
WIRE -656 -104 -672 -104
WIRE -560 -104 -576 -104
WIRE -528 -104 -560 -104
WIRE -432 -104 -464 -104
WIRE 560 -104 560 -152
WIRE -560 -88 -560 -104
WIRE -560 -88 -592 -88
WIRE -112 -88 -144 -88
WIRE 256 -88 224 -88
WIRE 512 -88 432 -88
WIRE 592 -88 592 -152
WIRE 624 -88 624 -104
WIRE 624 -88 592 -88
WIRE 672 -88 672 -104
WIRE 688 -88 688 -104
WIRE 688 -88 672 -88
WIRE 256 -72 176 -72
WIRE -736 -56 -736 -152
WIRE -672 -56 -672 -104
WIRE -640 -56 -672 -56
WIRE -576 -56 -640 -56
WIRE -560 -56 -576 -56
WIRE -464 -56 -480 -56
WIRE -592 -40 -592 -88
WIRE -592 -40 -624 -40
WIRE -320 -40 -320 -72
WIRE -320 -40 -448 -40
WIRE -272 -40 -272 -56
WIRE -272 -40 -320 -40
WIRE -16 -40 -16 -120
WIRE 0 -40 -16 -40
WIRE 176 -40 176 -72
WIRE 176 -40 160 -40
WIRE 496 -40 480 -40
WIRE 512 -40 496 -40
WIRE 720 -40 720 -56
WIRE 720 -40 704 -40
WIRE 784 -40 784 -56
WIRE 784 -40 720 -40
WIRE -368 -24 -368 -72
WIRE -208 -24 -208 -56
WIRE -208 -24 -368 -24
WIRE -176 -24 -208 -24
WIRE -816 -8 -816 -40
WIRE -576 -8 -576 -56
WIRE -560 -8 -576 -8
WIRE -464 -8 -464 -56
WIRE -464 -8 -480 -8
WIRE -128 -8 -128 -24
WIRE -112 -8 -128 -8
WIRE 464 -8 464 -152
WIRE 560 -8 560 -24
WIRE 560 -8 464 -8
WIRE 816 -8 816 -152
WIRE 816 -8 560 -8
WIRE -464 8 -464 -8
WIRE -464 8 -624 8
WIRE -432 8 -432 -104
WIRE -432 8 -464 8
WIRE -400 8 -432 8
WIRE -384 8 -400 8
WIRE -256 8 -304 8
WIRE -240 8 -256 8
WIRE -144 8 -144 -88
WIRE -112 8 -144 8
WIRE -32 8 -32 -152
WIRE -32 8 -48 8
WIRE 0 8 -32 8
WIRE 192 8 192 -120
WIRE 192 8 176 8
WIRE 256 8 192 8
WIRE 352 8 352 -136
WIRE 368 8 352 8
WIRE -256 24 -256 8
WIRE 224 24 224 -88
WIRE 256 24 224 24
WIRE 368 24 320 24
WIRE 480 24 480 -40
WIRE 496 24 480 24
WIRE 608 24 576 24
WIRE 800 24 784 24
WIRE -672 40 -672 24
WIRE -400 40 -400 8
WIRE -400 40 -672 40
WIRE 608 40 608 24
WIRE 608 40 576 40
WIRE 640 40 608 40
WIRE 720 40 704 40
WIRE 800 40 800 24
WIRE 800 40 752 40
WIRE -752 56 -816 56
WIRE -704 56 -752 56
WIRE -688 56 -704 56
WIRE -640 56 -688 56
WIRE -560 56 -576 56
WIRE 448 56 432 56
WIRE 752 56 752 40
WIRE 800 56 800 40
WIRE -560 72 -560 56
WIRE -544 72 -560 72
WIRE -32 72 -48 72
WIRE -736 88 -736 24
WIRE -640 88 -736 88
WIRE -480 88 -496 88
WIRE -400 88 -400 40
WIRE 544 88 512 88
WIRE 576 88 576 40
WIRE 576 88 544 88
WIRE 608 88 576 88
WIRE 720 88 720 40
WIRE 720 88 688 88
WIRE -688 104 -688 56
WIRE -48 104 -48 72
WIRE 32 104 -32 104
WIRE 48 104 32 104
WIRE 144 104 128 104
WIRE 176 104 144 104
WIRE 224 104 224 24
WIRE 512 104 512 88
WIRE -752 120 -752 56
WIRE -544 120 -560 120
WIRE -496 120 -496 88
WIRE -400 120 -496 120
WIRE -368 120 -400 120
WIRE -288 120 -304 120
WIRE -256 120 -256 104
WIRE -256 120 -288 120
WIRE -32 120 -32 104
WIRE 448 120 448 56
WIRE 464 120 448 120
WIRE 576 120 576 88
WIRE -544 136 -544 120
WIRE -496 136 -496 120
WIRE -400 136 -400 120
WIRE -176 136 -176 -24
WIRE -176 136 -272 136
WIRE -112 136 -112 104
WIRE 336 136 320 136
WIRE 416 136 400 136
WIRE 608 152 608 88
WIRE 624 152 624 136
WIRE 624 152 608 152
WIRE 672 152 672 136
WIRE 752 152 752 120
WIRE 800 152 800 136
WIRE 800 152 752 152
WIRE -816 168 -816 136
WIRE -272 168 -272 136
WIRE -160 168 -160 -152
WIRE -160 168 -224 168
WIRE 64 168 64 152
WIRE 144 168 144 104
WIRE 144 168 64 168
WIRE 464 168 448 168
WIRE -688 184 -688 168
WIRE -560 184 -688 184
WIRE -464 184 -480 184
WIRE 32 184 32 104
WIRE 112 184 112 152
WIRE 112 184 32 184
WIRE 752 184 752 152
WIRE 224 200 224 184
WIRE 224 200 208 200
WIRE 320 200 320 136
WIRE 320 200 304 200
WIRE 336 200 320 200
WIRE 416 200 416 136
WIRE 416 200 400 200
WIRE 512 200 512 184
WIRE 512 200 416 200
WIRE 576 200 576 184
WIRE 576 200 512 200
WIRE 720 200 720 88
WIRE 720 200 576 200
WIRE -752 216 -752 184
WIRE -288 216 -752 216
WIRE -160 216 -208 216
WIRE 32 216 32 184
WIRE 48 216 32 216
WIRE -160 232 -160 216
WIRE -144 232 -160 232
WIRE -112 232 -112 216
WIRE -112 232 -144 232
WIRE -32 232 -32 200
WIRE -32 232 -112 232
FLAG 560 -152 et1
FLAG 544 88 et2
FLAG -128 -24 Na
IOPIN -352 272 In
FLAG -112 -88 Nb
IOPIN -336 208 In
FLAG -544 -184 Na
IOPIN -768 112 Out
FLAG -544 72 Nb
IOPIN -768 368 Out
FLAG -240 8 In1
IOPIN -464 304 In
FLAG -288 120 Nc
FLAG -400 -168 In2
IOPIN -624 128 In
FLAG -400 136 -In1
IOPIN -624 432 In
FLAG -560 120 Nc
FLAG 704 -40 Ct1
IOPIN 480 256 Out
FLAG 672 152 Vcc
FLAG 304 200 Ct2
IOPIN 80 496 Out
FLAG -32 72 Rt
FLAG 48 216 Vcc
IOPIN -176 512 In
FLAG 784 24 Vref
IOPIN 560 320 Out
FLAG 208 200 Oct
IOPIN -16 496 In
FLAG -816 -8 Dtc
IOPIN -1040 288 In
FLAG -816 168 G
FLAG -400 8 G
FLAG -464 184 G
FLAG 400 -200 G
FLAG 448 168 G
FLAG 176 104 G
FLAG -144 232 G
FLAG -448 -40 G
FLAG 496 -40 G
FLAG 688 -104 Vcc
FLAG 752 184 G
FLAG -144 -152 -In2
IOPIN -368 144 In
FLAG -640 -56 Ct
FLAG -704 56 Fb
SYMBOL Digital\\dflop 80 -88 R0
SYMATTR Value Vhigh=5 Trise=50n Rout=30
SYMATTR InstName A1
SYMBOL Digital\\and 288 -168 R0
SYMATTR InstName A2
SYMATTR Value Vhigh=5 Trise=50n Rout=30
SYMBOL Digital\\and 288 -24 R0
SYMATTR InstName A3
SYMATTR Value Vhigh=5 Trise=50n Rout=30
SYMBOL Digital\\or 400 -168 R0
SYMATTR InstName A4
SYMATTR Value Vhigh=5 Trise=300n Rout=30
SYMBOL Digital\\or 400 -24 R0
SYMATTR InstName A5
SYMATTR Value Vhigh=5 Trise=300n Rout=30
SYMBOL g 560 -120 R0
SYMATTR Value table=(1 0,4 250m)
SYMATTR InstName G1
SYMBOL g 512 88 R0
SYMATTR Value table=(1 0,4 250m)
SYMATTR InstName G3
SYMBOL Digital\\or -80 -40 R0
SYMATTR InstName A6
SYMATTR Value Vhigh=5 Trise=50n Rout=30
SYMBOL Digital\\diffschmitt -640 -232 R0
SYMATTR Value Vt=0 Vh=0 Vhigh=5
SYMATTR InstName A7
SYMBOL Digital\\diffschmitt -640 8 R0
SYMATTR Value Vt=0 Vh=0 Vhigh=5
SYMATTR InstName A8
SYMBOL voltage -736 40 R180
SYMATTR InstName V4
SYMATTR Value .7
SYMBOL voltage -816 -136 R0
SYMATTR Value .1
SYMATTR InstName V5
SYMBOL diode -672 168 R180
SYMATTR InstName D1
SYMATTR Value Ideal
SYMBOL diode -736 184 R180
SYMATTR InstName D2
SYMATTR Value Ideal
SYMBOL res -272 8 R0
SYMATTR InstName R1
SYMATTR Value 1e6
SYMBOL res -384 -168 R0
SYMATTR InstName R2
SYMATTR Value 1e6
SYMBOL cap -304 104 R90
SYMATTR InstName C1
SYMATTR Value 15n9
SYMBOL cap -192 -56 R180
SYMATTR InstName C2
SYMATTR Value 15n9
SYMBOL zener 544 -168 R90
SYMATTR InstName D3
SYMATTR Value IdealZ
SYMBOL e -576 184 M90
SYMATTR Value table=(0,0 1.96m,0 2m,2 2.04m,4 20m,4.5)
SYMATTR InstName E1
SYMBOL res -384 72 R90
SYMATTR InstName R3
SYMATTR Value 1e7
SYMBOL res -288 -8 R90
SYMATTR InstName R4
SYMATTR Value 1e7
SYMBOL res -336 -168 R0
SYMATTR InstName R5
SYMATTR Value 1e7
SYMBOL res -288 -152 R0
SYMATTR InstName R6
SYMATTR Value 1e6
SYMBOL current -816 56 R0
SYMATTR InstName I1
SYMATTR Value .7m
SYMBOL voltage -112 120 R0
SYMATTR Value 3.65
SYMATTR InstName V2
SYMBOL f -480 -56 R90
SYMATTR InstName F1
SYMATTR Value V2 -1
SYMBOL sw -672 40 R180
SYMATTR InstName S1
SYMATTR Value Osc
SYMBOL diode 736 -56 R180
SYMATTR InstName D4
SYMATTR Value Ideal1
SYMBOL diode 800 -56 R180
SYMATTR InstName D5
SYMATTR Value Ideal2
SYMBOL g 704 -152 M270
SYMATTR Value table=(0 250m,1.42 243m,1.46 150m,1.57 0)
SYMATTR InstName G2
SYMBOL zener 560 120 R0
SYMATTR Value IdealZ
SYMATTR InstName D6
SYMBOL diode 336 216 R270
SYMATTR InstName D7
SYMATTR Value Ideal1
SYMBOL diode 336 152 R270
SYMATTR InstName D8
SYMATTR Value Ideal2
SYMBOL g 704 88 M270
SYMATTR Value table=(0 250m,1.42 243m,1.46 150m,1.57 0)
SYMATTR InstName G4
SYMBOL cap 656 -216 R90
SYMATTR InstName C3
SYMATTR Value 5p
SYMBOL cap 704 24 R90
SYMATTR InstName C4
SYMATTR Value 5p
SYMBOL diode -112 88 M90
SYMATTR Value Ideal
SYMATTR InstName D9
SYMBOL res -464 -24 R90
SYMATTR InstName R7
SYMATTR Value 1e7
SYMBOL res 592 8 R90
SYMATTR InstName R8
SYMATTR Value 1e7
SYMBOL res 576 -216 R90
SYMATTR InstName R9
SYMATTR Value 1e7
SYMBOL g 144 104 M270
SYMATTR Value TABLE=(1 0,5 4.5m,6.85 7.6m,40 8.4m)
SYMATTR InstName G5
SYMBOL current 800 136 R180
SYMATTR InstName I2
SYMATTR Value 25m
SYMBOL diode 768 120 R180
SYMATTR InstName D10
SYMATTR Value Ideal3
SYMBOL bi -32 120 R0
SYMATTR Value I=I(D10)+25m
SYMATTR InstName B1
SYMBOL res 240 200 R180
SYMATTR InstName R10
SYMATTR Value 1k
SYMBOL res -560 -120 R90
SYMATTR InstName R11
SYMATTR Value 5k
SYMBOL cap -464 -120 R90
SYMATTR InstName C5
SYMATTR Value 10p
SYMBOL e -304 216 M90
SYMATTR Value table=(0,0 1.96m,0 2m,2 2.04m,4 20m,4.5)
SYMATTR InstName E2