* SPICE netlist
I1 Vcc COM TBL(0 0 1 .2m)
D1 COM Vcc 34V
A1 Vcc COM COM COM COM COM N004 COM SCHMITT Vt=8.2 Vh=0.3 Vhigh=2.5 Rout=1k
R1 Vcc N004 8e6
C1 N004 COM 1p
S1 N003 Vcc N004 2v5 ref
D2 N003 Vcc V65
C2 2v5 COM 1p Rpar=240
R2 2v5 N003 240
R3 Ref N003 280m
C3 COM Ref 10p
C4 Osc COM 5p Rpar=10meg
C5 Vfb COM 1p
R4 N006 Vfb 165k
C6 Err N006 1p Rpar=10G
A4 N006 2v5 COM COM COM COM Err COM OTA Vhigh=6 Vlow=0.7 Isrc=1m Isink=-6m Rclamp=1 g=5 Rout=25k Cout=5p powerup=!V(fault,Com)
C7 Ifb COM 5p
R5 N009 Ifb 75k
C8 N009 COM 1p
D3 Err N011 2R
D4 N011 COM 1R
C9 N011 COM 0.1p Rpar=1e6
A6 Ref COM COM COM COM fault COM COM SCHMITT Vt=4.8 Vh=.1 trise=200n
S2 Out Vcc N008 N007 Ho
S3 Com Out N007 N008 Lo
C10 Vcc COM 20p
C11 Out Com 20p
A2 N009 N011 COM COM COM COM N010 COM SCHMITT vt=1m vh=1m tripdt=3n trise=100n
A3 N005 N010 COM COM COM COM N008 COM SRFLOP td=10n trise=200n
A7 Osc COM COM COM COM COM N005 COM SCHMITT vt=1.75 vh=0.85 td=10n trise=100n
G2 Osc COM N005 COM 8.3m
A5 N005 0 0 0 fault 0 N007 0 OR trise=100n

* LTspice schematic (.asc)
Version 4
SHEET 1 1248 1280
WIRE -592 -640 -624 -640
WIRE 624 -640 592 -640
WIRE -624 -608 -624 -640
WIRE 624 -608 624 -640
WIRE -464 -320 -512 -320
WIRE -368 -320 -464 -320
WIRE -272 -320 -368 -320
WIRE -16 -320 -272 -320
WIRE 64 -320 -16 -320
WIRE 96 -320 64 -320
WIRE 208 -320 160 -320
WIRE 288 -320 208 -320
WIRE 320 -320 288 -320
WIRE 432 -320 400 -320
WIRE 496 -320 432 -320
WIRE -16 -304 -16 -320
WIRE 288 -304 288 -320
WIRE 432 -304 432 -320
WIRE -464 -288 -464 -320
WIRE -368 -288 -368 -320
WIRE -272 -240 -272 -320
WIRE -240 -240 -272 -240
WIRE -144 -240 -176 -240
WIRE 64 -240 64 -320
WIRE 96 -240 64 -240
WIRE 208 -240 208 -320
WIRE 208 -240 176 -240
WIRE 432 -208 432 -240
WIRE -240 -192 -240 -224
WIRE -144 -192 -144 -240
WIRE -16 -192 -16 -224
WIRE -16 -192 -144 -192
WIRE 64 -192 -16 -192
WIRE 112 -192 64 -192
WIRE 208 -192 160 -192
WIRE 288 -192 288 -224
WIRE 288 -192 208 -192
WIRE 320 -192 288 -192
WIRE -464 -176 -464 -208
WIRE -368 -176 -368 -224
WIRE 64 -176 64 -192
WIRE 208 -176 208 -192
WIRE -464 -112 -512 -112
WIRE -384 -112 -464 -112
WIRE -240 -112 -384 -112
WIRE -80 -112 -176 -112
WIRE -464 -96 -464 -112
WIRE -304 -96 -336 -96
WIRE 64 -80 64 -112
WIRE 208 -80 208 -112
WIRE -304 -64 -304 -96
WIRE -80 -64 -80 -112
WIRE -80 -64 -304 -64
WIRE -336 -32 -336 -48
WIRE -336 -32 -384 -32
WIRE -240 -16 -240 -96
WIRE -464 0 -464 -32
WIRE -384 0 -384 -32
WIRE -144 48 -512 48
WIRE -464 128 -512 128
WIRE -416 128 -464 128
WIRE -272 128 -336 128
WIRE -240 128 -272 128
WIRE -144 128 -144 48
WIRE -144 128 -176 128
WIRE -464 160 -464 128
WIRE -272 176 -272 128
WIRE -240 176 -272 176
WIRE 432 176 336 176
WIRE 480 176 432 176
WIRE -240 192 -288 192
WIRE -144 192 -144 128
WIRE -144 192 -176 192
WIRE -80 192 -80 -64
WIRE 160 192 -80 192
WIRE 272 208 224 208
WIRE 336 208 336 176
WIRE 432 208 432 176
WIRE 288 224 240 224
WIRE -464 256 -464 224
WIRE 160 256 96 256
WIRE -224 272 -224 240
WIRE 0 272 -32 272
WIRE 96 272 96 256
WIRE 96 272 64 272
WIRE 272 272 272 208
WIRE 288 272 272 272
WIRE 432 304 432 272
WIRE 0 320 0 288
WIRE 336 320 336 288
WIRE 432 320 336 320
WIRE 496 320 432 320
WIRE -144 336 -144 192
WIRE 336 352 336 320
WIRE 432 352 432 320
WIRE 272 368 272 272
WIRE 288 368 272 368
WIRE -80 384 -80 192
WIRE 80 384 -80 384
WIRE 240 384 240 224
WIRE 240 384 176 384
WIRE 240 416 240 384
WIRE 288 416 240 416
WIRE -464 432 -528 432
WIRE -416 432 -464 432
WIRE -288 432 -336 432
WIRE -16 432 -288 432
WIRE 80 432 48 432
WIRE 240 432 240 416
WIRE -144 464 -144 400
WIRE -80 464 -144 464
WIRE -16 464 -80 464
WIRE 336 464 336 432
WIRE 432 464 432 416
WIRE 432 464 336 464
WIRE 480 464 432 464
WIRE -464 480 -464 432
WIRE -288 480 -288 432
WIRE -144 480 -144 464
WIRE -80 480 -80 464
WIRE 80 480 80 464
WIRE -16 496 -16 480
WIRE 336 496 336 464
WIRE -464 576 -464 544
WIRE -288 576 -288 544
WIRE -144 576 -144 544
WIRE -80 576 -80 544
WIRE -624 640 -624 608
WIRE -592 640 -624 640
WIRE 624 640 624 608
WIRE 624 640 592 640
FLAG 496 320 Out
IOPIN 656 384 In
FLAG 432 -208 COM
FLAG 496 -320 Ref
IOPIN 656 -256 In
FLAG -512 -112 Osc
IOPIN -352 -48 In
FLAG -288 576 COM
FLAG -512 128 Vfb
IOPIN -352 192 In
FLAG -512 48 Err
IOPIN -352 112 In
FLAG -144 576 COM
FLAG -528 432 Ifb
IOPIN -368 496 In
FLAG -464 576 COM
FLAG -464 256 COM
FLAG -464 0 COM
FLAG -288 192 2v5
FLAG -512 -320 Vcc
IOPIN -352 -256 In
FLAG 208 -80 COM
FLAG 480 176 Vcc
IOPIN 640 240 In
FLAG 480 464 Com
IOPIN 640 528 In
FLAG 432 304 COM
FLAG 320 -192 2v5
FLAG -32 272 Ref
FLAG -80 576 COM
FLAG -368 -176 COM
FLAG 64 -80 COM
FLAG 96 272 fault
FLAG -464 -176 COM
FLAG 0 320 COM
FLAG -224 272 COM
FLAG -240 -192 COM
FLAG 336 496 COM
FLAG -16 496 COM
FLAG 80 480 COM
FLAG -384 0 COM
FLAG -240 -16 COM
SYMBOL current -464 -288 R0
SYMATTR Value TBL(0 0 1 .2m)
SYMATTR InstName I1
SYMBOL zener -384 -224 M180
SYMATTR InstName D1
SYMATTR Value 34V
SYMBOL Digital\\schmtbuf -240 -304 R0
SYMATTR InstName A1
SYMATTR Value Vt=8.2 Vh=0.3
SYMATTR Value2 Vhigh=2.5 Rout=1k
SYMBOL res -32 -320 R0
SYMATTR InstName R1
SYMATTR Value 8e6
SYMBOL cap 48 -176 R0
SYMATTR InstName C1
SYMATTR Value 1p
SYMBOL sw 192 -240 M270
SYMATTR InstName S1
SYMATTR Value ref
SYMBOL diode 160 -336 R90
SYMATTR InstName D2
SYMATTR Value V65
SYMBOL cap 224 -176 M0
SYMATTR Value 1p
SYMATTR SpiceLine Rpar=240
SYMATTR InstName C2
SYMBOL res 304 -208 R180
SYMATTR InstName R2
SYMATTR Value 240
SYMBOL res 416 -336 R90
SYMATTR InstName R3
SYMATTR Value 280m
SYMBOL cap 416 -240 M180
SYMATTR InstName C3
SYMATTR Value 10p
SYMBOL cap -448 -96 M0
SYMATTR Value 5p
SYMATTR InstName C4
SYMATTR SpiceLine Rpar=10meg
SYMBOL cap -448 160 M0
SYMATTR InstName C5
SYMATTR Value 1p
SYMBOL res -320 112 R90
SYMATTR InstName R4
SYMATTR Value 165k
SYMBOL cap -176 112 R90
SYMATTR InstName C6
SYMATTR Value 1p
SYMATTR SpiceLine Rpar=10G
SYMBOL Digital\\or -208 144 R0
SYMATTR InstName A4
SYMATTR InstName OTA
SYMATTR Value Vhigh=6 Vlow=0.7 Isrc=1m Isink=-6m
SYMATTR Value2 Rclamp=1 g=5 Rout=25k Cout=5p
SYMATTR SpiceLine powerup=!V(fault,Com)
SYMBOL cap -448 480 M0
SYMATTR InstName C7
SYMATTR Value 5p
SYMBOL res -320 416 R90
SYMATTR InstName R5
SYMATTR Value 75k
SYMBOL cap -304 480 R0
SYMATTR InstName C8
SYMATTR Value 1p
SYMBOL diode -128 336 M0
SYMATTR Value 2R
SYMATTR InstName D3
SYMBOL diode -128 480 M0
SYMATTR Value 1R
SYMATTR InstName D4
SYMBOL cap -96 480 R0
SYMATTR InstName C9
SYMATTR Value 0.1p
SYMATTR SpiceLine Rpar=1e6
SYMBOL Digital\\schmtinv 0 208 R0
SYMATTR InstName A6
SYMATTR Value Vt=4.8 Vh=.1
SYMATTR Value2 trise=200n
SYMBOL sw 336 304 M180
SYMATTR InstName S2
SYMATTR Value Ho
SYMBOL sw 336 448 M180
SYMATTR InstName S3
SYMATTR Value Lo
SYMBOL cap 416 208 R0
SYMATTR Value 20p
SYMATTR InstName C10
SYMBOL cap 416 352 R0
SYMATTR InstName C11
SYMATTR Value 20p
SYMBOL Digital\\diffschmitt -16 384 R0
SYMATTR Value vt=1m vh=1m tripdt=3n trise=100n
SYMATTR InstName A2
SYMBOL Digital\\srflop 128 336 R0
SYMATTR Value td=10n trise=200n
SYMATTR InstName A3
SYMBOL Digital\\schmtbuf -240 -176 R0
SYMATTR InstName A7
SYMATTR Value vt=1.75 vh=0.85 td=10n trise=100n
SYMBOL g2 -384 -16 R180
SYMATTR InstName G2
SYMATTR Value 8.3m
SYMBOL Digital\\or 192 160 R0
SYMATTR InstName A5
SYMATTR Value trise=100n