Demultiplexer u 1 u 2 u 3 u 4 u 11 u 22 u 33 u 44 u 1

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DeMultiplexer u-1 u-2 u-3 u-4 u-11 u-22 u-33 u-44 u-1 u-2 u-3 u-4 Mux u-11 u-44 u-33 u-22 Demux 0 S 0 1 2 3 Data S 1 S 1 S 0 y 0 y 1 y 2 y 3 0 0 D 0 0 0 0 1 0 D 0 0 1 0 0 0 D 0 1 1 0 0 0 D 26
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Demultiplexer is very much like a decoder S 0 S 1 Data 3 2 1 0 Dmux I 0 S 1 S 0 0 0 1 0 1 1 1 y 0 y 1 y 2 y 3 I 1 I 2 I 3 0 0 0 0 0 0 0 0 0 0 0 0 0 B A y 2 y 3 y 1 y 0 E 2/4 Y 0 Y 1 Y 2 Y 3 A B E 0 0 0 1 1 0 1 0 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 x x 1 0 0 0 0 0 0 0 B A E Y 0 Y 1 Y 2 Y 3 Y 0 Y 1 Y 2 Y 3 Data S 0 S 1 Data 27
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Adder Half Adder a b S C 28
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Adder Half Adder a b S C a b S 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1 C 29
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Adder Half Adder a b S C a b S 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1 C . . ; . S a b a b C a b a b C S 30
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Adder Half Adder a b S C a b S 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1 C . . ; . S a b a b C a b a b C S a b S Full Adder C out C in 1 1 1 1 1 1 0 --------- 1 1 0 1 31
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Adder a b S 0 0 0 0 0 0 1 0 1 1 0 0 1 0 1 1 0 1 1 1 1 1 0 0 0 1 1 0 0 1 1 0 1 0 0 0 1 1 1 1 C in C out Half Adder a b S C a b S 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1 C . . ; . S a b a b C a b a b C S a b S Full Adder C out C in 1 1 1 1 1 1 0 --------- 1 1 0 1 32
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Adder a b S 0 0 0 0 0 0 1 0 1 1 0 0 1 0 1 1 0 1 1 1 1 1 0 0 0 1 1 0 0 1 1 0 1 0 0 0 1 1 1 1 C in C out Half Adder a b S C a b S 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1 C . . ; . S a b a b C a b a b C S a b S Full Adder C out C in . . . . . . . . ; . . . . . . . . in in in in out in in in in S a b c a b c a b c a b c C a b c a b c a b c a b c 1 1 1 1 1 1 0 --------- 1 1 0 1 33
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. . . . . . . . in in in in S a b c a b c a b c a b c . . . . . . . . out in in in in C a b C a b C a b C a b C 34
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. . . . . . . . in in in in S a b c a b c a b c a b c . . . . . . . . out in in in in C a b C a b C a b C a b C ( ) in S C a b ( . . ) . .( ) . out in in C C a b a b a b C a b a b 35
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. . . . . . . . in in in in S a b c a b c a b c a b c . . . . . . . . out in in in in C a b C a b C a b C a b C ( ) in S C a b ( . . ) . .( ) .
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