Looking for classes? Ksquare Career Institute, Bengaluru →
The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage waveforms of A, B and C are as shown below -
[add image]
The logic circuit gate is :
[add image]
The logic circuit gate is :
A
AND gate
B
NAND gate
C
NOR gate
D
OR gate
Detailed Solution
Read the waveforms interval by interval and compare the output C with the inputs A and B.
In the given waveforms the output C is high (1) only during those intervals in which both the inputs A and B are high (1).
Whenever either A or B (or both) is low (0), the output C is low (0).
This is the truth table of the AND gate: $C = A \cdot B$.
An OR gate would give a high output when any one input is high, and NAND and NOR gates would give a high output when both inputs are low.
So the logic circuit gate is an AND gate.
In the given waveforms the output C is high (1) only during those intervals in which both the inputs A and B are high (1).
Whenever either A or B (or both) is low (0), the output C is low (0).
This is the truth table of the AND gate: $C = A \cdot B$.
An OR gate would give a high output when any one input is high, and NAND and NOR gates would give a high output when both inputs are low.
So the logic circuit gate is an AND gate.