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Question 20

Draw the output signal Y in the given combination of gates.

$$\text{Output of NAND gate} = \overline{A \cdot A} = \bar{A}$$

$$\text{Output of OR gate} = \bar{A} + B$$ 

$$Y = \overline{\bar{A} + B} = \overline{\overline{A}} \cdot \bar{B} = A \cdot \bar{B}$$

$$Y$$ is 1 for $$A =$$ and $$B = 0$$

Hence, $$Y = 1$$ for intervals $$(0,1)$$ and $$(4,5)$$, and $$0$$ elsewhere.

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