One positive pulse with tw = 75 �s is applied to one of the inputs of an exclusi

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Question
One positive pulse with t_w = 75 �s is applied to one of the inputs of an exclusive-OR circuit. A second positive pulse with t_w = 15 �s is applied to the other input beginning 20 �s after the leading edge of the first pulse. Which statement describes the output in relation to the inputs?
Options
A. The exclusive-OR output is a 20 µs pulse followed by a 40 µs pulse, with a separation of 15 µs between the pulses.
B. The exclusive-OR output is a 20 µs pulse followed by a 15 µs pulse, with a separation of 40 µs between the pulses.
C. The exclusive-OR output is a 15 µs pulse followed by a 40 µs pulse.
D. *The exclusive-OR output is a 20 µs pulse followed by a 15 µs pulse, followed by a 40 µs pulse.

Correct Answer

*The exclusive-OR output is a 20 µs pulse followed by a 15 µs pulse, followed by a 40 µs pulse.

5. A 4-variable AND-OR circuit produces a 1 at its Y output. Which combination of inputs is correct?
Options
A. A = 0, B = 0, C = 0, D = 0
B. A = 0, B = 1, C = 1, D = 0
C. A = 1, B = 1, C = 0, D = 0
D. A = 1, B = 0, C = 0, D = 0