1. What would the output pulse train, Y, look like given the following inputs?
h g f e d c b a
0 0 1 1 0 1 1 1
0 0 0 0 1 1 1 0
A
B
Y ?
ans: Pulse a = 0, Pulse b = 1, Pulse c = 0, Pulse d = 1, Pulse e = 0, Pulse f = 0,
Pulse g = 0, Pulse h = 0
2. Draw the logic symbol for a 6-inut AND gate. Label the inputs A, B, C, D, E, and F.
Label the output Y.
ans:
A
B
C
D
E
F
Y
3. Draw the logic symbol for a 7-input OR gate. Label the inputs A, B, C, D, E, F and G.
Label the output Y.
ans:
A
B
C
D
E
F
G
Y
4. Describe the pulse train at output Y of the AND gate, if input B is 0.
h g f e d c b a
0 0 1 1 0 1 1 1
A
B
Y ?
ans: A zero at input B will disable the AND gate, and the output will be zero.
5. Describe the pulse train output Y of problem 4, if the input B is 1.
ans: The output waveform will look exactly like the input waveform at input A.
6. Describe the pulse train at output Y of the OR gate, if the input B is 0.
h g f e d c b a
0 0 1 1 0 1 1 1
A
B
Y ?
ans: The output waveform will look exactly like the input waveform at input A.
7. Describe the pulse train at output Y of problem 6, if the input B is 1.
