3.Signal D works as a control signal.Determine different functions when D=1 or D=0. inputs outputs D AB C =1 0 0 0 0 0 1 0 1 0 0 1 1 0 0 400 1 0 1 1 1 0 1 1 1 4.Design the logic diagram for a comparator.(input:A B,output:F1 F2 F3) A=BF1=0, A>BF2=0, A<BF3=0。 5.Design a logic diagram for three persons'vote (When two or three persons say "yes",the result is"yes")。 -3-‐ 3 ‐  3．Signal D works as a control signal. Determine different functions when D=1 or D=0.           inputs        outputs D A B    S C 0 0 0       0 0 1       0 1 0       0 1 1       1 0 0       1 0 1       1 1 0       1 1 1       4.Design the logic diagram for a comparator.(input: A B, output: F1 F2 F3) A=B    F1=0， A>B    F2=0， A<B    F3=0。 5．Design a logic diagram for three persons’ vote (When two or three persons say “yes”, the result is “yes”)