* SPICE netlist
C1 Hin Vss 10p Rpar=750k
D1 Hin Vdd Dd
D2 Vss Hin Dd
R1 Vdd 1 25e6
S1 1 Vss 4 0 Si
A1 Hin 1 0 0 0 0 4 0 SCHMITT Vt=0 Vh=0 Trise=50n Tfall=10n Td=60n Tripdt=10n
C2 SD Vss 10p Rpar=750k
D3 SD Vdd Dd
D4 Vss SD Dd
R2 Vdd 2 25e6
S2 2 Vss 5 0 Si
A2 SD 2 0 0 0 0 5 0 SCHMITT Vt=0 Vh=0 Td=80n Tripdt=20n
C3 Lin Vss 10p Rpar=750k
D5 Lin Vdd Dd
D6 Vss Lin Dd
R3 Vdd 3 25e6
S3 3 Vss 6 0 Si
A3 Lin 3 0 0 0 0 6 0 SCHMITT Vt=0 Vh=0 Trise=50n Tfall=10n Td=60n Tripdt=10n
A4 0 0 4 0 5 0 7 0 Dflop
A5 0 0 6 0 5 0 8 0 Dflop
A6 Vb Vs 0 0 0 0 9 0 SCHMITT Vt=8.35 Vh=.15 Td=50n Tripdt=10n
A7 9 0 4 7 10 12 11 0 AND Tau=18n Tripdt=5n
S4 Ho Vb 11 0 SH
S5 Ho Vs 12 0 SL
C4 Vb Ho 22p
C5 Ho Vs 22p Rpar=100k
D7 Ho Vb Dd
D8 Vs Ho Dd
D9 Com Vb 525V
D10 Vs Vb 25V
D11 Vss Vdd 25Vdd
D12 Vss Vcc 25V
D13 Com Vcc 25V
A8 Vcc Com 0 0 0 0 10 0 SCHMITT Vt=8.35 Vh=.15 Td=50n Tripdt=10n
A9 10 8 0 0 6 14 13 0 AND Tau=18n Tripdt=5n
S6 Lo Vcc 13 0 SH
S7 Lo Com 14 0 SL
C6 Vcc Lo 22p
C7 Lo Com 22p Rpar=100k
D14 Lo Vcc Dd
D15 Com Lo Dd

* LTspice schematic (.asc)
Version 4
SHEET 1 1344 1296
WIRE -672 -616 -672 -648
WIRE -672 648 -672 616
WIRE -640 -648 -672 -648
WIRE -640 648 -672 648
WIRE -496 -312 -528 -312
WIRE -496 -280 -496 -312
WIRE -496 -168 -528 -168
WIRE -496 -168 -496 -216
WIRE -496 56 -528 56
WIRE -496 88 -496 56
WIRE -496 200 -528 200
WIRE -496 200 -496 152
WIRE -496 424 -528 424
WIRE -496 456 -496 424
WIRE -496 568 -528 568
WIRE -496 568 -496 520
WIRE -416 -456 -528 -456
WIRE -416 -424 -416 -456
WIRE -416 -328 -416 -360
WIRE -416 -312 -496 -312
WIRE -416 -312 -416 -328
WIRE -416 -280 -416 -312
WIRE -416 -168 -496 -168
WIRE -416 -168 -416 -216
WIRE -416 -88 -528 -88
WIRE -416 -56 -416 -88
WIRE -416 40 -416 8
WIRE -416 56 -496 56
WIRE -416 56 -416 40
WIRE -416 88 -416 56
WIRE -416 200 -496 200
WIRE -416 200 -416 152
WIRE -416 280 -528 280
WIRE -416 312 -416 280
WIRE -416 408 -416 376
WIRE -416 424 -496 424
WIRE -416 424 -416 408
WIRE -416 456 -416 424
WIRE -416 568 -496 568
WIRE -416 568 -416 520
WIRE -336 -456 -416 -456
WIRE -336 -440 -336 -456
WIRE -336 -296 -336 -360
WIRE -336 -280 -336 -296
WIRE -336 -168 -416 -168
WIRE -336 -168 -336 -200
WIRE -336 -88 -416 -88
WIRE -336 -72 -336 -88
WIRE -336 72 -336 8
WIRE -336 88 -336 72
WIRE -336 200 -416 200
WIRE -336 200 -336 168
WIRE -336 280 -416 280
WIRE -336 296 -336 280
WIRE -336 440 -336 376
WIRE -336 456 -336 440
WIRE -336 568 -416 568
WIRE -336 568 -336 536
WIRE -272 -264 -288 -264
WIRE -272 104 -288 104
WIRE -272 472 -288 472
WIRE -256 -296 -336 -296
WIRE -256 72 -336 72
WIRE -256 440 -336 440
WIRE -224 -328 -416 -328
WIRE -224 -296 -256 -296
WIRE -224 40 -416 40
WIRE -224 72 -256 72
WIRE -224 408 -416 408
WIRE -224 440 -256 440
WIRE -144 -312 -160 -312
WIRE -144 56 -160 56
WIRE -144 424 -160 424
WIRE -112 -312 -144 -312
WIRE -112 -216 -288 -216
WIRE -112 -216 -112 -312
WIRE -112 424 -144 424
WIRE -112 424 -112 392
WIRE -112 456 -112 424
WIRE -112 520 -288 520
WIRE -112 520 -112 456
WIRE -96 -216 -112 -216
WIRE -96 56 -144 56
WIRE -96 56 -96 -184
WIRE -96 152 -288 152
WIRE -96 152 -96 56
WIRE -96 360 -96 152
WIRE -96 392 -112 392
WIRE -16 -232 -32 -232
WIRE -16 408 -32 408
WIRE 0 -232 -16 -232
WIRE 0 -232 0 -296
WIRE 16 -344 16 -440
WIRE 16 296 16 -280
WIRE 16 392 16 296
WIRE 48 -440 16 -440
WIRE 48 296 16 296
WIRE 80 -440 48 -440
WIRE 80 -344 16 -344
WIRE 80 -312 -112 -312
WIRE 80 -296 0 -296
WIRE 80 -280 16 -280
WIRE 80 296 48 296
WIRE 80 392 16 392
WIRE 80 408 -16 408
WIRE 80 456 -112 456
WIRE 176 -424 144 -424
WIRE 176 -168 176 -424
WIRE 176 312 144 312
WIRE 176 568 176 312
WIRE 208 -360 208 -408
WIRE 208 -328 144 -328
WIRE 208 -328 208 -360
WIRE 208 -296 144 -296
WIRE 208 -264 208 -296
WIRE 208 -216 208 -264
WIRE 208 72 176 72
WIRE 208 104 208 72
WIRE 208 200 176 200
WIRE 208 200 208 168
WIRE 208 376 208 328
WIRE 208 408 144 408
WIRE 208 408 208 376
WIRE 208 440 144 440
WIRE 208 472 208 440
WIRE 208 520 208 472
WIRE 240 -408 208 -408
WIRE 240 -312 240 -360
WIRE 240 -264 240 -312
WIRE 240 -216 208 -216
WIRE 240 328 208 328
WIRE 240 424 240 376
WIRE 240 472 240 424
WIRE 240 520 208 520
WIRE 256 -312 240 -312
WIRE 256 424 240 424
WIRE 288 -456 144 -456
WIRE 288 -424 288 -456
WIRE 288 -312 288 -344
WIRE 288 -280 288 -312
WIRE 288 -168 176 -168
WIRE 288 -168 288 -200
WIRE 288 104 288 72
WIRE 288 200 208 200
WIRE 288 200 288 168
WIRE 288 280 144 280
WIRE 288 312 288 280
WIRE 288 424 288 392
WIRE 288 456 288 424
WIRE 288 568 176 568
WIRE 288 568 288 536
WIRE 368 -456 288 -456
WIRE 368 -408 368 -456
WIRE 368 -312 288 -312
WIRE 368 -312 368 -344
WIRE 368 -280 368 -312
WIRE 368 -168 288 -168
WIRE 368 -168 368 -216
WIRE 368 -72 368 -104
WIRE 368 200 368 -8
WIRE 368 280 288 280
WIRE 368 328 368 280
WIRE 368 424 288 424
WIRE 368 424 368 392
WIRE 368 456 368 424
WIRE 368 568 288 568
WIRE 368 568 368 520
WIRE 448 -456 368 -456
WIRE 448 -408 448 -456
WIRE 448 -312 368 -312
WIRE 448 -312 448 -344
WIRE 448 -280 448 -312
WIRE 448 -168 368 -168
WIRE 448 -168 448 -216
WIRE 448 -104 368 -104
WIRE 448 -72 448 -104
WIRE 448 24 448 -8
WIRE 448 72 288 72
WIRE 448 104 448 72
WIRE 448 200 368 200
WIRE 448 200 448 168
WIRE 448 280 368 280
WIRE 448 328 448 280
WIRE 448 424 368 424
WIRE 448 424 448 392
WIRE 448 456 448 424
WIRE 448 568 368 568
WIRE 448 568 448 520
WIRE 528 -456 448 -456
WIRE 528 -168 448 -168
WIRE 528 -104 448 -104
WIRE 528 24 448 24
WIRE 528 72 448 72
WIRE 528 200 448 200
WIRE 528 280 448 280
WIRE 528 568 448 568
WIRE 544 -312 448 -312
WIRE 544 424 448 424
WIRE 672 -648 640 -648
WIRE 672 -616 672 -648
WIRE 672 648 640 648
WIRE 672 648 672 616
FLAG 544 -312 Ho
IOPIN 720 -288 Out
FLAG 528 -456 Vb
IOPIN 704 -432 In
FLAG 528 -168 Vs
IOPIN 704 -144 In
FLAG 528 200 Com
IOPIN 704 224 In
FLAG 528 280 Vcc
IOPIN 704 304 In
FLAG 528 568 Com
IOPIN 704 592 In
FLAG 544 424 Lo
IOPIN 720 448 Out
FLAG 256 424 0
FLAG 256 -312 0
FLAG -16 408 8
FLAG 208 -360 11
FLAG 208 -264 12
FLAG 528 72 Vcc
IOPIN 704 96 In
FLAG 528 -104 Vb
IOPIN 704 -80 In
FLAG 528 24 Vs
IOPIN 704 48 In
FLAG 48 -440 9
FLAG 48 296 10
FLAG -528 -312 Hin
IOPIN -352 -288 In
FLAG -528 -456 Vdd
IOPIN -352 -432 In
FLAG -528 -168 Vss
IOPIN -352 -144 In
FLAG -528 56 SD
IOPIN -352 80 In
FLAG -528 -88 Vdd
IOPIN -352 -64 In
FLAG -528 200 Vss
IOPIN -352 224 In
FLAG -256 -296 1
FLAG -256 440 3
FLAG -144 -312 4
FLAG -144 56 5
FLAG -144 424 6
FLAG -528 424 Lin
IOPIN -352 448 In
FLAG -528 280 Vdd
IOPIN -352 304 In
FLAG -528 568 Vss
IOPIN -352 592 In
FLAG -272 -264 0
FLAG -272 104 0
FLAG -272 472 0
FLAG -256 72 2
FLAG -16 -232 7
FLAG 176 200 Vss
IOPIN 352 224 In
FLAG 176 72 Vdd
IOPIN 352 96 In
FLAG 208 376 13
FLAG 208 472 14
SYMBOL cap -512 -280 R0
SYMATTR InstName C1
SYMATTR Value 10p
SYMATTR SpiceLine Rpar=750k
SYMBOL diode -432 -360 M180
SYMATTR InstName D1
SYMATTR Value Dd
SYMBOL diode -432 -216 M180
SYMATTR InstName D2
SYMATTR Value Dd
SYMBOL res -352 -456 R0
SYMATTR InstName R1
SYMATTR Value 25e6
SYMBOL sw -336 -296 M0
SYMATTR InstName S1
SYMATTR Value Si
SYMBOL Digital\\diffschmtbuf -224 -376 R0
SYMATTR InstName A1
SYMATTR Value Vt=0 Vh=0
SYMATTR Value2 Trise=50n Tfall=10n
SYMATTR SpiceLine Td=60n Tripdt=10n
SYMBOL cap -512 88 R0
SYMATTR InstName C2
SYMATTR Value 10p
SYMATTR SpiceLine Rpar=750k
SYMBOL diode -432 8 M180
SYMATTR InstName D3
SYMATTR Value Dd
SYMBOL diode -432 152 M180
SYMATTR InstName D4
SYMATTR Value Dd
SYMBOL res -352 -88 R0
SYMATTR InstName R2
SYMATTR Value 25e6
SYMBOL sw -336 72 M0
SYMATTR InstName S2
SYMATTR Value Si
SYMBOL Digital\\diffschmtbuf -224 -8 R0
SYMATTR Value Vt=0 Vh=0
SYMATTR Value2 Td=80n
SYMATTR SpiceLine Tripdt=20n
SYMATTR InstName A2
SYMBOL cap -512 456 R0
SYMATTR InstName C3
SYMATTR Value 10p
SYMATTR SpiceLine Rpar=750k
SYMBOL diode -432 376 M180
SYMATTR InstName D5
SYMATTR Value Dd
SYMBOL diode -432 520 M180
SYMATTR InstName D6
SYMATTR Value Dd
SYMBOL res -352 280 R0
SYMATTR InstName R3
SYMATTR Value 25e6
SYMBOL sw -336 440 M0
SYMATTR InstName S3
SYMATTR Value Si
SYMBOL Digital\\diffschmtbuf -224 360 R0
SYMATTR InstName A3
SYMATTR Value Vt=0 Vh=0
SYMATTR Value2 Trise=50n Tfall=10n
SYMATTR SpiceLine Td=60n Tripdt=10n
SYMBOL Digital\\and -64 -280 R0
SYMATTR InstName A4
SYMATTR InstName Dflop
SYMBOL Digital\\and -64 456 M180
SYMATTR InstName A5
SYMATTR InstName Dflop
SYMBOL Digital\\diffschmtbuf 144 -504 M0
SYMATTR InstName A6
SYMATTR Value Vt=8.35 Vh=.15
SYMATTR Value2 Td=50n Tripdt=10n
SYMBOL Digital\\and 112 -376 R0
SYMATTR InstName A7
SYMATTR Value Tau=18n
SYMATTR Value2 Tripdt=5n
SYMBOL sw 288 -328 M180
SYMATTR InstName S4
SYMATTR Value SH
SYMBOL sw 288 -296 R0
SYMATTR InstName S5
SYMATTR Value SL
SYMBOL cap 352 -408 R0
SYMATTR InstName C4
SYMATTR Value 22p
SYMBOL cap 352 -280 R0
SYMATTR InstName C5
SYMATTR Value 22p
SYMATTR SpiceLine Rpar=100k
SYMBOL diode 432 -344 M180
SYMATTR InstName D7
SYMATTR Value Dd
SYMBOL diode 432 -216 M180
SYMATTR InstName D8
SYMATTR Value Dd
SYMBOL zener 352 -8 M180
SYMATTR InstName D9
SYMATTR Value 525V
SYMBOL zener 432 -8 M180
SYMATTR InstName D10
SYMATTR Value 25V
SYMBOL zener 192 168 M180
SYMATTR InstName D11
SYMATTR Value 25Vdd
SYMBOL zener 272 168 M180
SYMATTR InstName D12
SYMATTR Value 25V
SYMBOL zener 432 168 M180
SYMATTR InstName D13
SYMATTR Value 25V
SYMBOL Digital\\diffschmtbuf 144 232 M0
SYMATTR InstName A8
SYMATTR Value Vt=8.35 Vh=.15
SYMATTR Value2 Td=50n Tripdt=10n
SYMBOL Digital\\and 112 360 R0
SYMATTR InstName A9
SYMATTR Value Tau=18n
SYMATTR Value2 Tripdt=5n
SYMBOL sw 288 408 M180
SYMATTR InstName S6
SYMATTR Value SH
SYMBOL sw 288 440 R0
SYMATTR InstName S7
SYMATTR Value SL
SYMBOL cap 352 328 R0
SYMATTR InstName C6
SYMATTR Value 22p
SYMBOL cap 352 456 R0
SYMATTR InstName C7
SYMATTR Value 22p
SYMATTR SpiceLine Rpar=100k
SYMBOL diode 432 392 M180
SYMATTR InstName D14
SYMATTR Value Dd
SYMBOL diode 432 520 M180
SYMATTR InstName D15
SYMATTR Value Dd