Question
Download Solution PDFAND gate EXOR gate combination is ____
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFA half adder circuit is basically made up of and a AND gate with an XOR gate as shown below.
- A half adder is also known as XOR gate because XOR is applied to both inputs to produce the sum
- Half adder can add only two bits (A and B) and has nothing to do with the carry
- If the input to a half adder has a carry, then it will neglect it and adds only the A and B bits
- That means the binary addition process is not complete and that's why it is called a half adder
Sum (S) = A⊕B, Carry = A.B
|
INPUTS |
OUTPUTS |
||
|
A |
B |
Sum |
CARRY |
|
0 |
0 |
0 |
0 |
|
0 |
1 |
1 |
0 |
|
1 |
0 |
1 |
0 |
|
1 |
1 |
0 |
1 |
A Full adder can be realized using two half adders as shown:
A full adder can be implemented using 2 XOR, 2 AND, 1 OR as shown in the figure:
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