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  4. Identify the logic operation performed by the circuit given below.

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Q. Identify the logic operation performed by the circuit given below.Physics Question Image

KCETKCET 2006Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

The output of the circuit is,
$y=\overline{\bar{A}+\bar{B}} $
$\bar{\bar{A}}\cdot\bar{\bar{B}}$
$\overline {A} \cdot B$
$\left(\because\bar{\bar{A}}=A and \bar{\bar{B}} =B\right)$
which is the output of an AND gate.