_______ are universal logic gates.
| _______ are universal logic gates.
A. NAND and NOR gates
B. NOT Gates and EX-OR Gates
C. AND Gates and NOT Gates
D. OR Gates and EX-OR Gates
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
- AND, OR, NOT gates are the basic gates.
- The logic gates which are derived from the basic gates like AND, OR, NOT gates are known as derived gates. XOR and XNOR are the derived gates.
- A universal gate is a gate that can implement any Boolean function without the need to use any other gate type.
- NAND and NOR gates are universal gates.
The implementation of other gates using only NOR gate is as shown:
|
Logic Gates |
Min. number of NOR Gate |
Min. number of NAND Gate |
|
NOT |
1 |
1 |
|
AND |
3 |
2 |
|
OR |
2 |
3 |
|
EX-OR |
5 |
4 |
|
EXNOR |
4 |
5 |
|
NAND |
4 |
1 |
|
NOR |
1 |
4 |
|
Half-Adder |
5 |
5 |
|
Half-Subtractor |
5 |
5 |
|
Full-Adder |
9 |
9 |
|
Full-Subtractor |
9 |
9 |
