Question

A 4-bit parallel adder can add 
Two 4 - bit binary numbers
Two 2 -bit binary numbers
four bits at a time
4 bits in sequence​

Answer 1

Correct option is B)

Explanation:

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.

Answer 2

Answer:

i don't know the correct answer

Explanation:

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.