Answer
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Hint: NAND gate is the combination of a NOT gate and a AND gate. The property of AND is that its output is equal to the product of the input while the NOT gate gives output opposite to the input fed to it.
Detailed step by step answer:
A NAND gate is made by connecting a NOT gate and a AND gate with each other. The symbol for NAND gate is given as
The Boolean expression for a NAND gate is given as
$Y = \mathop {A.B}\limits^{\_\_\_\_\_\_} = \mathop A\limits^{\_\_} + \mathop B\limits^{\_\_} $
For ${t_1}$ to ${t_2}$; we have A = 1 and B = 0, using the Boolean algebra or the truth table for NAND gate we get y = 1
For ${t_2}$ to ${t_3}$; we have A = 1 and B = 1, using the Boolean algebra or the truth table for NAND gate we get y = 0
For ${t_3}$ to ${t_4}$; we have A = 0 and B = 1, using the Boolean algebra or the truth table for NAND gate we get y = 1
For ${t_4}$ to ${t_5}$; we have A = 0 and B = 0, using the Boolean algebra or the truth table for NAND gate we get y = 1
For ${t_5}$ to ${t_6}$; we have A = 1 and B = 0, using the Boolean algebra or the truth table for NAND gate we get y = 1
On the basis of the above results, the correct option is C from the given choices.
Note:
1. In digital electronics, the higher value of voltage is considered 1 whereas lower value of voltage is considered 0.
2. In order to obtain a NAND gate, the AND and NOT gate must be connected in series with each other. Attaching them in parallel will not give the desired gate.
Detailed step by step answer:
A NAND gate is made by connecting a NOT gate and a AND gate with each other. The symbol for NAND gate is given as
The Boolean expression for a NAND gate is given as
$Y = \mathop {A.B}\limits^{\_\_\_\_\_\_} = \mathop A\limits^{\_\_} + \mathop B\limits^{\_\_} $
For ${t_1}$ to ${t_2}$; we have A = 1 and B = 0, using the Boolean algebra or the truth table for NAND gate we get y = 1
For ${t_2}$ to ${t_3}$; we have A = 1 and B = 1, using the Boolean algebra or the truth table for NAND gate we get y = 0
For ${t_3}$ to ${t_4}$; we have A = 0 and B = 1, using the Boolean algebra or the truth table for NAND gate we get y = 1
For ${t_4}$ to ${t_5}$; we have A = 0 and B = 0, using the Boolean algebra or the truth table for NAND gate we get y = 1
For ${t_5}$ to ${t_6}$; we have A = 1 and B = 0, using the Boolean algebra or the truth table for NAND gate we get y = 1
On the basis of the above results, the correct option is C from the given choices.
Note:
1. In digital electronics, the higher value of voltage is considered 1 whereas lower value of voltage is considered 0.
2. In order to obtain a NAND gate, the AND and NOT gate must be connected in series with each other. Attaching them in parallel will not give the desired gate.
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