Digital Electronics Past Paper PDF - February 2023
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2023
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This is a digital electronics past paper, February 2023. The paper covers various digital electronics concepts, including conversions, arithmetic, logic gates, CMOS and TTL devices, multiplexers, and memory devices. The questions offer a good practice opportunity for students preparing for exams.
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## Digital Electronics **Code No.: 2189** [Maximum Marks: 50] **Time: 2:30 Hours] ** **Notes:** - Attempt all questions. Attempt any two parts of each question. - Students are advised to specially check the Numerical Data of question paper in both versions. If there is any difference in Hindi Tr...
## Digital Electronics **Code No.: 2189** [Maximum Marks: 50] **Time: 2:30 Hours] ** **Notes:** - Attempt all questions. Attempt any two parts of each question. - Students are advised to specially check the Numerical Data of question paper in both versions. If there is any difference in Hindi Translation of any question, the students should answer the question according to the English version. - Use of Pager and Mobile Phone by the students is not allowed. **Q1)** a) Solve: ABC<sub>16</sub> = ?<sub>2</sub> b) Solve: 2B.C4<sub>16</sub> = ?<sub>10</sub> c) Solve: 42<sub>10</sub> = ?<sub>2</sub> [2×5=10] **Q2)** a) Subtract the following by using binary arithmetic: i) 7.25 from 9.50 ii) 6.25 from 10.75 b) Give a comparison of weighted code and nonweighted code. c) Show that logical operations AND, OR and NOT can be implemented with NAND gates. [2×5=10] **Q3)** a) What is fan-out of CMOS? b) Differentiate between TTL and CMOS on basic of different parameters. c) State De Morgan's theorem in equations form and verify by the truth tables for the first and second law. [2×5=10] **Q4)** a) Plot the following Boolean expression on K-map Y = ABCD + ABCD + ABCD + ABCD b) Discuss half adder circuit, design and implementation. c) Give block diagram of an n-to-1 multiplexer, its equivalent circuit and realization of 2 : 1 MUX using gates. [2×5=10] **Q5)** a) Draw a 4-bit shift right register and give its operation. b) Explain the working principle of A/D converter. c) Describe static and dynamic RAM. [2×5=10] F-254 1 (P.T.O.) **(Hindi Translation)** **Code No.: 2189** [Maximum Marks: 50] **Notes:** - Attempt all questions. Attempt any two parts of each question. - Students are advised to specially check the Numerical Data of question paper in both versions. If there is any difference in Hindi Translation of any question, the students should answer the question according to the English version. - Use of Pager and Mobile Phone by the students is not allowed. **Q1)** a) Solve: ABC<sub>16</sub> = ?<sub>2</sub> b) Solve: 2B.C4<sub>16</sub> = ?<sub>10</sub> c) Solve: 42<sub>10</sub> = ?<sub>2</sub> [2×5=10] **Q2)** a) Subtract the following by using binary arithmetic: i) 7.25 from 9.50 ii) 6.25 from 10.75 b) Give a comparison of weighted code and nonweighted code. c) Show that logical operations AND, OR and NOT can be implemented with NAND gates. [2×5=10] **Q3)** a) What is fan-out of CMOS? b) Differentiate between TTL and CMOS on basic of different parameters. c) State De Morgan's theorem in equations form and verify by the truth tables for the first and second law. [2×5=10] **Q4)** a) Plot the following Boolean expression on K-map Y = ABCD + ABCD + ABCD + ABCD b) Discuss half adder circuit, design and implementation. c) Give block diagram of an n-to-1 multiplexer, its equivalent circuit and realization of 2 : 1 MUX using gates. [2×5=10] **Q5)** a) Draw a 4-bit shift right register and give its operation. b) Explain the working principle of A/D converter. c) Describe static and dynamic RAM. [2×5=10] F-254 2
