Types of Logic Gates

Question 1

What is NOT gate?

Answer 1

• Also known as an inverter
• The NOT gate inverts or complements the input logic level. Thus the output equals to the inverted input.
• Has only one input and one output

Question 2

What is a OR gate?

Answer 2

• Also called Logical Addition
• Its output is L (or 0) only when all the inputs are L (0).
• The OR gate output goes H (or 1) when any or all inputs are High, i.e. a 1 at any input results in a 1 at the output

Question 3

What is a AND gate?

Answer 3

• Also called Logical Multiplication
• The AND gate output is 1 (H) only when all its inputs are 1 (H).
• The AND Gate output is 0 (L) when any of its inputs is 0 (L)

Question 4

What is a NOR gate?

Answer 4

• Can be considered as being an OR gate followed by a NOT gate.
• The NOR gate output is 1 only when all its inputs is 0.
• The NOR gate output is 0 when any of its inputs is 1.

Question 5

What is a NAND gate?

Answer 5

• Is derived from an AND gate connected in cascade with a NOT gate.
• The NAND output is only L (or 0) when all its inputs are H (or 1).
• The NAND Gate output is 1 (H) when any of its inputs is 0 (L)

Question 6

What is a XOR gate?

Answer 6

• The XOR gate output only goes high when both its inputs are at different logic levels.

Question 7

What is a XNOR gate?

Answer 7

• The XNOR gate output only goes high when both its inputs are of the same logic level..