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DLC Final Section Q Set A

This document contains instructions for a final exam assessment for a digital logic and circuits course. It includes 4 questions that require the student to use digits from their student ID (XX-ABCDE-X) to complete circuit designs and simulations. Question 1 asks the student to design an irregular counter. Question 2 asks them to design an LED flasher circuit. Question 3 involves constructing an 8-bit analog to digital converter and digital to analog converter. Question 4 asks the student to sketch the output waveform of a 4-bit bidirectional shift register over 8 clock pulses.

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shohanur rahman
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335 views1 page

DLC Final Section Q Set A

This document contains instructions for a final exam assessment for a digital logic and circuits course. It includes 4 questions that require the student to use digits from their student ID (XX-ABCDE-X) to complete circuit designs and simulations. Question 1 asks the student to design an irregular counter. Question 2 asks them to design an LED flasher circuit. Question 3 involves constructing an 8-bit analog to digital converter and digital to analog converter. Question 4 asks the student to sketch the output waveform of a 4-bit bidirectional shift register over 8 clock pulses.

Uploaded by

shohanur rahman
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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SET: A

AMERICAN INTERNATIONAL UNIVERSITY – BANGLADESH (AIUB)


Faculty of Engineering
Bachelor of Science in Computer Engineering/Computer Science and Engineering
EEE 3101: Digital Logic and Circuits (Section: Q)
Final-Term Assessment Fall 2023-24 Total Marks: 30 Time: 1.5 hrs
Course Instructors: Mr. Nafiz Ahmed Chisty, Dr. Shahriyar Masud Rizvi, Dr. Tanbir Ibne Anowar,
Dr. Gour Chand Mazumder, Mr. Abir Ahmed, Mr. Md. Shahariar Parvez, Mr. Tamim Hossain, Mr. Richard
Victor Biswas, Mr. Abrar Fahim Liaf

Instructions:
• You must answer Question 1
• Answer any Two from Question 2 to Question 4
• Please upload the answer script as PDF with your exam permit.

Q-1: Design a synchronous binary irregular counter with the following counting sequence.
(A+1) (B+6) (C+5) (D+4) (E+3)

NB: Please Take your ID. Let’s your ID is XX- ABCDE- X


Note: If any two-digit matches, then take unique number for the second one.
(Ex.: Let’s ID= XX- 33445-X, so your sequence is 6, 10, 6, 8, 11. But here you have the same digit 6. So,
please the one unique number for second 6, which will not matched with any other digit.)

Q-2: Design an LED flasher circuit using IC 555 where LED will be ON for (A+4) sec and OFF for (D+6)
sec until the system is running. Determine the following specifications: mode of operation, frequency, tH,
tL,, RA, RB, Duty cycle. Also draw the wave shape observed at Pin # 3. (Let, C=AE uF)

NB: The value of A, B, C, D, E are to be taken from the student ID. The reference student ID is XX-ABCDE-
X.

Q-3: Construct an 8-bit analog to digital converter (ADC) where the input voltage is (B+3)(C+2). Then,
construct an 8-bit digital to analog converter (DAC) and compute the analog voltage output. Use input bit
from ADC, where ‘bit-1’ represents (B+3)(C+2)-1 and 0V as ‘bit-0’. Available resources are a few 1kΩ,
2kΩ, 4kΩ, 8kΩ, 16kΩ, 32kΩ, 64kΩ and 128kΩ resistors. Consider feedback resistor is equal to twice of
minimum resistor.

NB: The value of A, B, C, D, E are to be taken from the student ID. The reference student ID is XX-ABCDE-
X.

Q-4: Sketch the output waveform for a 4- bit bidirectional shift registers in next 8 clock pulses into a timing
diagram assuming initial output Q0=1, Q1=0, Q2=1, Q3=1 before 1st clock pulse. The control bit pattern is
(A+4)(D+3) needs to be found by converting decimal value to 8-bit binary. The Serial data input line is
HIGH.

NB: The value of A, B, C, D, E are to be taken from the student ID. The reference student ID is XX-ABCDE-
X.

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