Minimum number of NAND gates required to implement the following binary…
2020
Minimum number of NAND gates required to implement the following binary equation (A'+B')(C+D), ISRO 2020
- A.
4
- B.
5
- C.
3
- D.
6
Attempted by 320 students.
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Correct answer: A
To implement the expression (A'+B')(C+D) using NAND gates:
= (A'+B')(C+D)
= (A'+B')C + (A'+B')D
= (AB)'C + (AB)'D
= [{(AB)'C}'.{(AB)'D}']' 
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