Question
Question: Input waveforms A and B as shown in Fig-I are applied to the combination of gates as shown in Fig-II...
Input waveforms A and B as shown in Fig-I are applied to the combination of gates as shown in Fig-II. Which of the waveforms shown in Fig. (i) to (iv) correctly represents the output waveform?
A
Fig.(i)
B
Fig.(ii)
C
Fig.(iii)
D
Fig. (iv)
Answer
Fig.(iii)
Explanation
Solution
Y = Aˉ+Bˉ
Ž A0011B0101Y1110 Ž $10101010
}\begin{matrix} = 01111101 \end{matrix}$$ So, output is 'zero' when both inputs are 'one'. In all other cases output is one.