* SPICE netlist
A1 1 8 8 8 8 8 7 8 BUF
A2 1 8 8 8 8 6 8 8 BUF
A3 1 8 8 8 8 6 7 8 BUF
A4 1 8 8 8 8 8 7 8 SCHMITT
A5 1 8 8 8 8 6 8 8 SCHMITT
A6 1 8 8 8 8 6 7 8 SCHMITT
A7 1 2 8 8 8 8 7 8 SCHMITT
A8 1 2 8 8 8 6 8 8 SCHMITT
A9 1 2 8 8 8 6 7 8 SCHMITT
A10 1 2 3 4 5 6 7 8 AND
A11 1 2 3 4 5 6 7 8 OR
A12 1 2 3 4 5 6 7 8 XOR
A13 1 2 8 8 8 6 7 8 SRFLOP
A14 1 8 3 4 5 6 7 8 DFLOP
A15 1 2 8 8 8 8 7 8 PHASEDET
A16 1 2 8 8 8 8 7 8 MODULATOR
A17 1 2 8 8 8 8 7 8 VARISTOR

* LTspice schematic (.asc)
Version 4
SHEET 1 1472 480
WIRE -720 -208 -736 -208
WIRE -720 -192 -720 -176
WIRE -656 -208 -640 -208
WIRE -720 0 -720 16
WIRE -656 -16 -640 -16
WIRE -720 -16 -736 -16
WIRE -720 208 -720 224
WIRE -720 176 -736 176
WIRE -656 160 -640 160
WIRE -656 192 -640 192
WIRE -448 -208 -432 -208
WIRE -512 -192 -512 -176
WIRE -512 -208 -528 -208
WIRE -512 0 -512 16
WIRE -448 -16 -432 -16
WIRE -512 -16 -528 -16
WIRE -512 208 -512 224
WIRE -448 160 -432 160
WIRE -448 192 -432 192
WIRE -512 176 -528 176
WIRE -304 -176 -304 -160
WIRE -240 -208 -224 -208
WIRE -304 -224 -320 -224
WIRE -304 -192 -320 -192
WIRE -240 -16 -224 -16
WIRE -304 -32 -320 -32
WIRE -304 0 -320 0
WIRE -304 16 -304 32
WIRE -304 208 -304 224
WIRE -304 160 -320 160
WIRE -304 192 -320 192
WIRE -240 160 -224 160
WIRE -240 192 -224 192
WIRE -64 -240 -112 -240
WIRE -64 -224 -80 -224
WIRE -64 -208 -112 -208
WIRE -64 -192 -80 -192
WIRE -64 -176 -112 -176
WIRE 0 -224 16 -224
WIRE 0 -192 16 -192
WIRE -48 -176 -48 -160
WIRE -64 -48 -112 -48
WIRE -64 -32 -80 -32
WIRE -64 -16 -112 -16
WIRE -64 0 -80 0
WIRE -64 16 -112 16
WIRE -48 16 -48 32
WIRE 0 -32 16 -32
WIRE 0 0 16 0
WIRE -64 160 -112 160
WIRE -64 176 -80 176
WIRE -64 192 -112 192
WIRE -64 208 -80 208
WIRE -64 224 -112 224
WIRE 0 176 32 176
WIRE 16 208 32 208
WIRE -32 224 -32 240
WIRE 144 -208 128 -208
WIRE 144 -160 128 -160
WIRE 240 -208 272 -208
WIRE 256 -160 272 -160
WIRE 144 -128 144 -112
WIRE 304 64 336 64
WIRE 320 112 336 112
WIRE 144 64 128 64
WIRE 144 112 128 112
WIRE 224 160 224 192
WIRE 224 16 224 -16
WIRE 224 192 208 192
WIRE 224 -16 208 -16
WIRE 144 160 144 176
WIRE 576 -192 592 -192
WIRE 448 -208 432 -208
WIRE 448 -176 432 -176
WIRE 448 -144 448 -128
WIRE 448 32 432 32
WIRE 448 96 432 96
WIRE 592 64 608 64
WIRE 448 128 448 144
WIRE 720 -208 704 -208
WIRE 720 -176 704 -176
WIRE 736 -224 736 -240
WIRE 736 -160 736 -144
FLAG -736 -208 1
IOPIN -336 144 In
FLAG -640 -208 7
IOPIN -240 144 Out
FLAG -720 -176 8
FLAG -720 16 8
FLAG -640 -16 6
IOPIN -240 336 Out
FLAG -736 -16 1
IOPIN -336 336 In
FLAG -720 224 8
FLAG -736 176 1
IOPIN -336 528 In
FLAG -640 160 7
IOPIN -240 512 Out
FLAG -640 192 6
IOPIN -240 544 Out
FLAG -432 -208 7
IOPIN -32 144 Out
FLAG -512 -176 8
FLAG -528 -208 1
IOPIN -128 144 In
FLAG -512 16 8
FLAG -432 -16 6
IOPIN -32 336 Out
FLAG -528 -16 1
IOPIN -128 336 In
FLAG -512 224 8
FLAG -528 176 1
IOPIN -128 528 In
FLAG -432 160 7
IOPIN -32 512 Out
FLAG -432 192 6
IOPIN -32 544 Out
FLAG -304 -160 8
FLAG -224 -208 7
IOPIN 176 144 Out
FLAG -320 -224 1
IOPIN 80 128 In
FLAG -320 -192 2
IOPIN 80 160 In
FLAG -224 -16 6
IOPIN 176 336 Out
FLAG -320 -32 1
IOPIN 80 320 In
FLAG -320 0 2
IOPIN 80 352 In
FLAG -304 32 8
FLAG -304 224 8
FLAG -320 160 1
IOPIN 80 512 In
FLAG -320 192 2
IOPIN 80 544 In
FLAG -224 160 7
IOPIN 176 512 Out
FLAG -224 192 6
IOPIN 176 544 Out
FLAG -112 -240 1
IOPIN 288 112 In
FLAG -80 -224 2
IOPIN 320 128 In
FLAG -112 -208 3
IOPIN 288 144 In
FLAG -80 -192 4
IOPIN 320 160 In
FLAG -112 -176 5
IOPIN 288 176 In
FLAG 16 -224 7
IOPIN 416 128 Out
FLAG 16 -192 6
IOPIN 416 160 Out
FLAG -48 -160 8
FLAG -112 -48 1
IOPIN 288 304 In
FLAG -80 -32 2
IOPIN 320 320 In
FLAG -112 -16 3
IOPIN 288 336 In
FLAG -80 0 4
IOPIN 320 352 In
FLAG -112 16 5
IOPIN 288 368 In
FLAG -48 32 8
FLAG 16 -32 7
IOPIN 416 320 Out
FLAG 16 0 6
IOPIN 416 352 Out
FLAG -112 160 1
IOPIN 288 512 In
FLAG -80 176 2
IOPIN 320 528 In
FLAG -112 192 3
IOPIN 288 544 In
FLAG -80 208 4
IOPIN 320 560 In
FLAG -112 224 5
IOPIN 288 576 In
FLAG 32 176 7
IOPIN 432 528 Out
FLAG 32 208 6
IOPIN 432 560 Out
FLAG -32 240 8
FLAG 128 -208 1
IOPIN 528 144 In
FLAG 128 -160 2
IOPIN 528 192 In
FLAG 272 -208 7
IOPIN 672 144 Out
FLAG 272 -160 6
IOPIN 672 192 Out
FLAG 144 -112 8
FLAG 336 64 7
IOPIN 736 416 Out
FLAG 336 112 6
IOPIN 736 464 Out
FLAG 128 64 1
IOPIN 528 416 In
FLAG 128 112 3
IOPIN 528 464 In
FLAG 208 -16 4
IOPIN 608 336 In
FLAG 208 192 5
IOPIN 608 544 In
FLAG 144 176 8
FLAG 592 -192 7
IOPIN 992 160 Out
FLAG 432 -208 1
IOPIN 832 144 In
FLAG 432 -176 2
IOPIN 832 176 In
FLAG 448 -128 8
FLAG 432 32 1
IOPIN 832 384 In
FLAG 432 96 2
IOPIN 832 448 In
FLAG 608 64 7
IOPIN 1008 416 Out
FLAG 448 144 8
FLAG 704 -208 1
IOPIN 1104 144 In
FLAG 704 -176 2
IOPIN 1104 176 In
FLAG 736 -240 7
FLAG 736 -144 8
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\buf1 -320 80 R0
SYMATTR InstName A1
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\inv -320 272 R0
SYMATTR InstName A2
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\buf -320 464 R0
SYMATTR InstName A3
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\schmtbuf -112 80 R0
SYMATTR InstName A4
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\schmtinv -112 272 R0
SYMATTR InstName A5
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\schmitt -112 464 R0
SYMATTR InstName A6
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\diffschmtbuf 96 80 R0
SYMATTR InstName A7
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\diffschmtinv 96 272 R0
SYMATTR InstName A8
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\diffschmitt 96 464 R0
SYMATTR InstName A9
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\and 368 80 R0
SYMATTR InstName A10
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\or 368 272 R0
SYMATTR InstName A11
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\xor 384 480 R0
SYMATTR InstName A12
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\srflop 592 96 R0
SYMATTR InstName A13
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\dflop 624 368 R0
SYMATTR InstName A14
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\Digital\phidet 880 160 R0
SYMATTR InstName A15
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\SpecialFunctions\modulate 848 384 R0
SYMATTR InstName A16
SYMBOL C:\PROGRAM\ FILES\LTC\SWCADIII\lib\sym\SpecialFunctions\varistor 1152 96 R0
SYMATTR InstName A17