The following circuit is a :

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KVS TGT WET (Work Experience Teacher) 23 Dec 2018 Official Paper
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  1. Half subtractor
  2. Half adder
  3. Full adder
  4. Full subtractor

Answer (Detailed Solution Below)

Option 2 : Half adder
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Detailed Solution

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A half adder circuit is made up of an 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

 

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