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NEET 2015
Exam
NEET
Year
2015
Subject
Physics
Chapter
Semiconductors

NEET 2015 · Physics · Semiconductors

Which logic gate is represented by the following combination of...

Which logic gate is represented by the following combination of logic gates?

Which logic gate is represented by the following combination of logic gates?

Options

  1. AOR
  2. BNAND
  3. CAND
  4. DNOR

Correct answer

C. AND

Step-by-step solution

y1=A−,y2=B−{y}_{1} = \overset{-}{A}, {y}_{2} = \overset{-}{B}

y=y1+y2¯=A¯+B¯¯y = \overset{¯}{{y}_{1} + {y}_{2}} = \overset{¯}{\overset{¯}{A} + \overset{¯}{B}}

Using De-Morgan's theorem

y=A¯+B¯¯=A.By = \overset{¯}{\overset{¯}{A} + \overset{¯}{B}} = A . B
So, it is AND gate
Truth table:
A B y1{y}_{1} y2{y}_{2} y
0 0 1 1 0
0 1 1 0 0
1 0 0 1 0
1 1 0 0 1
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