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Question
How many full adders are needed to add two 4-bit numbers with a parallel adders?
How many full adders are needed to add two 4-bit numbers with a parallel adders?
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Solution
The correct option is B 4
4 full adders are needed to add two
4-bit numbers with a parallel adders.
5.9 FOUR-BIT BINARY PARALLEL ADDER. ...
Two binary numbers each of n bits can be added by means of a full adder
circuit. Consider the example that two 4-bit binary numbers B 4B 3B 2B 1 and A
4A 3A 2A 1 are to be added with a carry input C 1.
MOS technology. Sum (Σ) outputs are provided for each bit
and a resultant carry (C4) is obtained from the fourth bit. This adder features
full internal look ahead across all four bits. A 4 x n binary adder is easily
built up by cascading without any additional logic.
4 full adders are needed to add two 4-bit numbers with a parallel adders.
5.9 FOUR-BIT BINARY PARALLEL ADDER. ... Two binary numbers each of n bits can be added by means of a full adder circuit. Consider the example that two 4-bit binary numbers B 4B 3B 2B 1 and A 4A 3A 2A 1 are to be added with a carry input C 1.
MOS technology. Sum (Σ) outputs are provided for each bit and a resultant carry (C4) is obtained from the fourth bit. This adder features full internal look ahead across all four bits. A 4 x n binary adder is easily built up by cascading without any additional logic.
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