Analog Circuits (BEC402) - AKTU Question Paper 2025-26
B.Tech · Semester 4 · Free PDF Download
This is the official AKTU Analog Circuits Previous Year Question Paper for B.Tech Semester 4, academic session 2025-26. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.
Course:B.Tech
Semester:Semester 4
Session:2025-26
University:AKTU / UPTU
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Questions Asked in 2025-26
Analog Circuits (BEC402) — extracted question text · 70 marks · 3 Hours
Section AAttempt all questions in brief. 2x7 = 14
- aDefine the terms voltage amplifier, current amplifier
- bHow does feedback affect the gain of an amplifier?
- cExplain the concept of gain margin and phase margin in amplifier stability
- dExplain Bark-hausen criterion for oscillation
- eIf differential mode gain of a differential amplifier is 1000 and common mode gain is 10, calculate the CMRR in decibel for it
- fDefine minimum sustainable voltage and maximum usable load of a Current mirror Circuits
- gIn a non-inverting Op-Amp given that input voltage is 0.5 V, Rf=100 kΩ and Rin=10 kΩ, then what is the output voltage?
Section BAttempt any three of the following: 7 x 3 = 21
- aDescribe emitter follower. Derive expression for gain, input & output resistance
- bDesign a series-series feedback amplifier and calculate expressions for Af, Rof and Rif
- cDerive the expression of frequency of oscillation for RC phase shift oscillator. Explain its silent features
- dExplain current steering and properties of a current mirror. Also derive the relation between output current and reference current in Wilson current mirror
- eWhat is Super Diode? Describe the working of half wave precision rectifier giving its transfer characteristic
Section CAttempt any one part of the following: 7 x 1 = 7
- aDerive the expression of voltage gain, input resistance and output resistance of common source amplifier with source resistance
- bDerive the expressions for input impedance, output impedance, open circuit voltage gain, overall voltage gain and short circuit current gain after completing the AC analysis of common emitter amplifier with emitter resistance
- aDescribe the current Shunt feedback topology. Calculate the voltage gain, input and output resistance of voltage series feedback amplifier having Av =300, Ri=1.5 kΩ, Ro = 50 kΩ and β = 1/15
- bWhy is the Miller effect significant in high-frequency amplifiers? What is the effect of low and high frequency applications on amplification gain?
- aExplain the operation of a Wien bridge oscillator. calculate the frequency of oscillation for given values of R1 and R2 =100 kΩ , C1 and C2 = 50 pF
- bExplain the working of a tank circuit. Also derive the frequency of oscillation and condition of gain to get sustained oscillations for Colpitts oscillator
- aExplain the differential mode operation of differential amplifier. Alsoderive the mathematical expressions for differential mode gain
- bExplain the term Input Common Mode Range (ICMR) and its significance in differential amplifier design
- aDraw Op-Amp based Schmitt Trigger Circuit and explain its operation,hysteresisloop and applications
- bExplain Class B operation in amplifiers and discuss its drawback. How it can be overcome
Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.
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