Find the truth table for the circuit shown in the figure. What logic function will the circuit perform if the constant +5 V input to the first two gates is changed to ground potential?

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Solution :User Loaded Image | CSIT Guide

a. Truth table for the given circuit of logic function:

Y = \([\overline{\overline{5V.V_{A}}.\overline{5V.V_{B}}}]\)

Y = VA + VB

Y = OR operation

Inputs(V)

VA VB +5V
0

0

5

5

0

5

0

5

+5

+5

+5

+5

Intermediate(V)

5V.VA 5V.VB \(\overline{5V.V_{A}}\) \(\overline{5V.V_{B}}\)
0

0

5

5

0

5

0

5

+5

+5

0

0

0

5

0

5

Output(V)

\(\overline{\overline{5V.V_{A}}.\overline{5V.V_{B}}}\)
0

5

5

5

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