Version 4
SHEET 1 1532 932
WIRE 1184 -336 1152 -336
WIRE 1408 -320 1376 -320
WIRE 1184 -304 1152 -304
WIRE 1328 -160 1328 -224
WIRE 1200 -80 1168 -80
WIRE 1200 -48 1168 -48
WIRE 1024 -32 1024 -96
WIRE 1440 -32 1408 -32
WIRE -1056 -16 -1072 -16
WIRE -800 -16 -832 -16
WIRE -544 -16 -576 -16
WIRE -288 -16 -320 -16
WIRE -32 -16 -64 -16
WIRE 224 -16 192 -16
WIRE 480 -16 448 -16
WIRE 736 -16 704 -16
WIRE 992 -16 960 -16
WIRE 1008 -16 992 -16
WIRE 1200 -16 1168 -16
WIRE 1024 0 1024 -32
WIRE 1440 0 1408 0
WIRE -1056 16 -1072 16
WIRE -800 16 -832 16
WIRE -544 16 -576 16
WIRE -288 16 -320 16
WIRE -32 16 -64 16
WIRE 224 16 192 16
WIRE 480 16 448 16
WIRE 736 16 704 16
WIRE 992 16 960 16
WIRE 1008 16 992 16
WIRE 1200 16 1168 16
WIRE 1024 32 1024 0
WIRE 1440 32 1408 32
WIRE -1056 48 -1072 48
WIRE -800 48 -832 48
WIRE -544 48 -576 48
WIRE -288 48 -320 48
WIRE -32 48 -64 48
WIRE 224 48 192 48
WIRE 480 48 448 48
WIRE 736 48 704 48
WIRE 992 48 960 48
WIRE 1008 48 992 48
WIRE 1200 48 1168 48
WIRE 1024 64 1024 32
WIRE 1440 64 1408 64
WIRE -1056 80 -1072 80
WIRE -800 80 -832 80
WIRE -544 80 -576 80
WIRE -288 80 -320 80
WIRE -32 80 -64 80
WIRE 224 80 192 80
WIRE 480 80 448 80
WIRE 736 80 704 80
WIRE 992 80 960 80
WIRE 1008 80 992 80
WIRE 1200 80 1168 80
WIRE 1200 112 1168 112
WIRE 1200 144 1168 144
FLAG -944 -96 VDD
IOPIN -944 -96 In
FLAG -944 144 Clock
IOPIN -944 144 In
FLAG -1072 -16 B3
IOPIN -1072 -16 In
FLAG -1072 16 B2
IOPIN -1072 16 In
FLAG -1072 48 B1
IOPIN -1072 48 In
FLAG -1072 80 B0
IOPIN -1072 80 In
FLAG 992 -16 B3D
FLAG 992 16 B2D
FLAG 992 48 B1D
FLAG 992 80 B0D
FLAG 1056 80 B0Di
FLAG 1056 48 B1Di
FLAG 1056 16 B2Di
FLAG 1056 -16 B3Di
FLAG 1264 -160 VDD
FLAG 1440 -32 S3
IOPIN 1440 -32 Out
FLAG 1440 0 S2
IOPIN 1440 0 Out
FLAG 1440 32 S1
IOPIN 1440 32 Out
FLAG 1440 64 S0
IOPIN 1440 64 Out
FLAG 1328 208 VDD
FLAG 1168 -48 B3
FLAG 1168 16 B2
FLAG 1168 80 B1
FLAG 1168 144 B0
FLAG 1168 112 B0Di
FLAG 1168 48 B1Di
FLAG 1168 -16 B2Di
FLAG 1168 -80 B3Di
FLAG -688 -96 VDD
FLAG -688 144 Clock
FLAG -432 -96 VDD
FLAG -432 144 Clock
FLAG -176 -96 VDD
FLAG -176 144 Clock
FLAG 80 -96 VDD
FLAG 80 144 Clock
FLAG 336 -96 VDD
FLAG 336 144 Clock
FLAG 592 -96 VDD
FLAG 592 144 Clock
FLAG 848 -96 VDD
FLAG 848 144 Clock
FLAG 1024 -96 VDD
FLAG 1408 -320 S4
IOPIN 1408 -320 Out
FLAG 1152 -304 B3
FLAG 1152 -336 B3Di
FLAG 1232 -416 VDD
SYMBOL 4_bit_adder 1232 176 R0
SYMATTR InstName X19
SYMBOL 4_bit_register -1024 112 R0
SYMATTR InstName X20
SYMBOL 4_bit_register -768 112 R0
SYMATTR InstName X24
SYMBOL 4_bit_register -512 112 R0
SYMATTR InstName X25
SYMBOL 4_bit_register -256 112 R0
SYMATTR InstName X26
SYMBOL 4_bit_register 0 112 R0
SYMATTR InstName X31
SYMBOL 4_bit_register 256 112 R0
SYMATTR InstName X32
SYMBOL 4_bit_register 512 112 R0
SYMATTR InstName X33
SYMBOL 4_bit_register 768 112 R0
SYMATTR InstName X34
SYMBOL inverter 1008 -16 R0
SYMATTR InstName X1
SYMBOL inverter 1008 16 R0
SYMATTR InstName X2
SYMBOL inverter 1008 48 R0
SYMATTR InstName X3
SYMBOL inverter 1008 80 R0
SYMATTR InstName X4
SYMBOL Adderbit 1200 -240 R0
SYMATTR InstName X5