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Q.
The circuit given below represents which of the logic operations?
Semiconductor Electronics: Materials Devices and Simple Circuits
Solution:
Let two inputs are $A$ and $B$. The circuit can be shown as
The two gates shown are NAND gates.
The output of gate $1,\, Y_{1}=\overline{A.B}$
The output of gate $2,\, Y=\overline{Y_{1} . Y_{1}}$
or $Y=\overline{\overline{A .B} . \overline{A . B}}=\overline{\overline{A.B}}=A. B$
Thus, the combination behaves as an AND gate.
