Computer Science - Digital Computer Electronics - Discussion

Discussion Forum : Digital Computer Electronics - Section 3 (Q.No. 48)
48.
How many full and half-adders are required to add 16-bit numbers?
8 half-adders, 8 full-adders
1 half-adders, 15 full-adders
16 half-adders, no full-adders
4 half-adders, 12 full-adders
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Sameer said:   9 years ago
The one half-adder can add the least significant bit of the two numbers. Full adders are required to add the remaining 15 bits as they all involve adding carries.

Anjali said:   9 years ago
Please clarify me for this problem. As I have read a number of full adders required is = 2^n, where n = number of bit, then here 15 full adders. How? Please explain.

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