Question: The picture below represents a four - bit adder with carry - lookahead generator. The output sum and carry can respectively be expressed as S

The picture below represents a four

-

bit adder with carry

-

lookahead generator.

The output sum and carry can respectively be expressed as

S_{i} = P_{i} (

XOR

) C_{i}

C_{i + 1} = G_{i} + P_{i} C_{i}

What is the output for

C_{3}

of the carry lookahead generator when

A = 1110, B = 1110,

and

C_{0} = 1 ?

Fill in the blank

(0

or

1) .

Answer :

The picture below represents a four - bit adder

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