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Dentify the Gate, Write Its Truth Table and Draw Its Logic Symbol. - Physics

The following figure shows the input waveforms (A, B) and the output waveform (Y) of a gate. Identify the gate, write its truth table and draw its logic symbol.

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Solution

The truth table for the gate can be obtained from the waveforms (from t = 1) as

A B

`Y=bar(AB)`

 0  0  1
 0  1  1
 1  0  1
 1  1  0

Therefore, from the truth table, we can say that the gate is a NAND gate. The logic symbol for the NAND gate is

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