Course CE 221-A/F – Digital Logic Design
Assignment No. 1
Instructor: Dr Adnan Shah
Due Date September 16, 2025, 5:00 PM sharp
Total Marks 100
Assessment: This assignment will be evaluated against CLO-1 and GA-2.
General Instructions:
▪ Each question carries 5 marks.
▪ Submit your handwritten assignment in hard copy to Room G-17, FCSE.
▪ Late submissions will incur a penalty of 10 marks per day.
▪ This is an individual assignment; plagiarism will not be tolerated.
▪ Allowed resources: Lecture notes and textbooks only.
Q1. Name two advantages of digital data as compared to analog data.
Q2. List any three common products that measure analog quantities.
Q3. Define the sequence of bits (1s and 0s) represented by each of the
following sequences of levels:
(a) HIGH, HIGH, LOW, LOW, LOW, LOW, HIGH, HIGH
(b) HIGH, LOW, HIGH, LOW, HIGH, LOW, HIGH, LOW
Q4. For the pulse shown in Figure 1–60, graphically determine the following:
(a) rise time (b) fall time (c) pulse width (d) amplitude
Q5. What is the frequency of the waveform in Figure 1–61?
Q6. Determine the duty cycle of the waveform in Figure 1–61.
Q7. Form a single logical statement from the following information:
(a) The light is ON if SW1 is closed.
(b) The light is ON if SW2 is closed.
(c) The light is OFF if both SW1 and SW2 are open.
Q8. A basic 2-input logic circuit has a HIGH on one input and a LOW on the
other, and the output is HIGH. Identify the circuit.
Q9. Name the logic function of each block in Figure 1–63 based on your
observation of the inputs and outputs.
Q10. Consider a register that can store eight bits. Assume that it has been
reset so that it contains zeros in all positions. If you transfer four alternating
bits (0101) serially into the register, beginning with a 1 and shifting to the
right, what will the total content of the register be as soon as the fourth bit is
stored?
Q11. What do each of the following stand for?
(a) SPLD (b) CPLD (c) HDL (d) FPGA (e) GAL
Q12. Describe the process of place-and-route.
Q13. A pulse is displayed on the screen of an oscilloscope, and you measure
the baseline as 2 V and the top of the pulse as 10 V. What is the amplitude?
Q14. The period of a pulse waveform measures four horizontal divisions on an
oscilloscope. If the time base is set at 2 ms/div, what is the frequency of the
waveform?
Q15. Define troubleshooting.
Q16. Explain the signal-tracing method of troubleshooting.
Q17. Give some examples of the type of information that you look for when a
system is reported to have failed.
Q18. If the symptom of a particular system is an incorrect output, name two
possible causes.
Q19. How would you isolate a fault in a system?
Q20. Assume that you have isolated the problem down to a specific circuit
board. What are your options at this point?