## Working out the function of a combination of gates, Electrical Engineering

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#### Working out the function of a combination of gates?

Truth tables are able to be used to work out the function of a combination of gates.

 Inputs Outputs A B C D E Q 0 0 0 1 0 1 0 0 1 1 0 1 0 1 0 0 0 0 0 1 1 0 1 1 1 0 0 0 0 0 1 0 1 0 0 0 1 1 0 0 0 0 1 1 1 0 1 1

For illustration the truth table on the right show the intermediate outputs D and E as well as the final output Q for the system shown below.

D = NOT (A OR B)

E = B AND C

Q = D OR E = (NOT (A OR B)) OR (B AND C)

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