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Question
The outputs of two NOT gates are fed to a NOR gate. Draw the logic circuit of the combination of gates. Write its truth table. Identify the gate equivalent to this circuit.
Solution
`"Y"_1 = bar"A"`
`"Y"_2 = bar"B"`
`"Y" = overline("Y"_1+"Y"_2) = overline(bar"A"+bar"B") = underset(A)(=) underset(B)(=) = "A.B"`
he equivalent gate is AND gate
Truth table
| A | B | Y1 | Y2 | 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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