Question
Download Solution PDFCarry input is present in which of the following?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The basic block diagram for a Full Adder is as shown:
A full adder can be implemented using 2 XOR, 2 AND, 1 OR as shown in figure:
The truth table of a full adder logic is:
|
A |
B |
C |
Cin |
S |
|
0 |
0 |
0 |
0 |
0 |
|
0 |
0 |
1 |
0 |
1 |
|
0 |
1 |
0 |
0 |
1 |
|
0 |
1 |
1 |
1 |
0 |
|
1 |
0 |
0 |
0 |
1 |
|
1 |
0 |
1 |
1 |
0 |
|
1 |
1 |
0 |
1 |
0 |
|
1 |
1 |
1 |
1 |
1 |
The Sum output bit of a full adder is given by:
S = A ⊕ B ⊕ C
The carry output bit of a full adder is given by:
X1 = AB + BC + AC
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