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Q. The adjoining logic symbol is equivalent toPhysics Question Image

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Let after $1^{\text{st}}$NAND gate the result is $Z$.
$Z=\overline{A \cdot B}$
$2^{\text {nd }}$ NAND gate with common input behave like a NOT, result $y=\bar{Z}=\overline{\overline{A \cdot B}}=A B$