Linear Integrated Circuits 2022 Question Paper — Government College o…
The 2022 Linear Integrated Circuits previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Linear Integrated Circuits
- Course: Linear Integrated Circuits
- Branch: E&C Engineering
- Year: 2022
- Paper: end-term
- Duration: 180 minutes
- Total marks: 75
Instructions
- Attempt five questions in all selecting at least two questions from each Section.
- Each question carries 15 marks.
Questions
Section - A
- Q1. 1.a. Explain the operation of a basic differential amplifier. Draw the circuit diagram of emitter coupled differential amplifier and obtain its d.c. analysis. (10) b. Compare different configuration of differential amplifier. (5) [15 marks]
- Q2. 2.a. For a dual input, balanced output differential amplifier, $Rc=47K\Omega$, $R_{in1}=R_{in2}=20K\Omega$, $R_E=43K\Omega$, $h_{fe}=75$, $h_{ie}=20K\Omega$, $V_{CC}=9V$, $V_{EE}=-9V$ and $V_{BE}=0.7$. Determine: i. Operating point values. ii. Differential gain $Ai_d$. iii. Common mode gain $A_{cm}$. iv. CMRR in dB.
- Q2b. b. Draw the equivalent circuit diagram of an op-amp and explain the voltage transfer curve. (10,5) [15 marks]
- Q3. 3.a. Give reasons why an open-loop op-amp is unsuitable for linear applications. Explain why negative feedback is desirable in amplifier applications. b. Derive expressions for voltage gain and input resistance of a closed-loop non-inverting amplifier. (5,10) [15 marks]
- Q4. 4.a. Draw and explain the high-frequency equivalent model of the op-amp. b. Explain the operation of a differential amplifier with two op-amps. (5,10) [15 marks]
Section - B
- Q5. 5.a. Explain the operation of AC amplifier with single power supply. b. Design an adder circuit using an op-amp to get the output expression as: $V_{out} = - (V_1 + 10V_2 + 100V_3)$ where $V_1, V_2, V_3$ are inputs. Given That $R_F = 100 K\Omega$. (10,5) [15 marks]
- Q6. 6.a. Discuss the importance of Schmitt trigger circuit and explain its operation. b. Explain the operation of positive and negative clipper circuits. (7,8) [15 marks]
- Q7. 7.a. Explain the practical integration circuit. Explain its advantages. b. Design a low-pass filter at cut-off frequency of 1KHz with a passband gain of 2. (7,8) [15 marks]
- Q8. 8. Explain the following: a. Block diagram of 555 timer. b. Dual slope type A/D converter. (8,7) [15 marks]