University Questions with Answers (Long Answered Questions)

University Questions with Answers

(Long Answered Questions)

(Regulation 2008)        

Dec.-09      

Q.1 With circuit diagram, a.c. equivalent circuit and frequency response characteristics, explain the operation of a single tuned amplifier.    [Section 8.9] [8]

Q.2 Derive the expression for gain and cut-off frequencies of single tuned amplifier.      [Section 8.9]   [6]

Q.3 Describe any one method of neutralization used in tuned amplifiers. [Section 8.10] [8]

May-10     

Q.4 Explain Hazeltine neutralization.          [Section 8.10]      [8]

Dec.-10      

Q.5 Draw the circuit diagram of an emitter,         coupled BJT differential amplifier and derive expressions for differential gain, common mode gain,    CMRR, input impedance and output impedance.  [Section 8.8]        [16]

Q.6 Discuss the working of single tuned amplifier. [Section 8.9]        [16]

Q.7 What is the need for neutralization ?    [Section 8.10]      [6]

May-11

Q.8 Write short notes on multistage amplifiers. [Section 8.1]   [4]

Q.9    Draw the circuit diagram and the equivalent circuit of capacitive coupled single tuned amplifier and explain its operation. Derive the equation for voltage gain and the 3 dB bandwidth. Sketch also the frequency response of the amplifier [Section 8.9]        [12]

Q.10. Explain hazeltine neutralization. [Section 8. 10] [8]

Q.11 Draw the equivalent circuit of a single-tuned amplifier and derive the expression for the gain as a function of frequency. [Section 8.9]       [8]

Q.12 Explain, with necessary circuits, 1) Hazeltine neutralization and 2) Coil neutralization. [Section 8.10]       [8]

May-12

Q. 13 What is a differential amplifier and what are it's common mode and differential mode inputs ? [Section 8.4]     [6]

Q.14 Draw the circuit diagram and the equivalent circuit of capacitive coupled single tuned amplifier and explain its operation. Derive the equation for voltage gain and the 3 dB bandwidth. Sketch also the frequency response of the amplifier. [Section 8.9]       [12]

Q.15 With a neat circuit diagram, explain the Hazeltine method of neutralization. [Section 8.10] [6]

Dec.-12

Q.16 Discuss the advantages and limitations of multistage amplifier. [Section 8.1] [6]

Q.17 Draw the circuit of emitter coupled differential amplifier and explain its operation in differential mode and common mode. [Section 8.5]        [16]

May-13

Q.18 Draw the circuit diagram of an emitter, coupled BJT differential amplifier and derive expressions for differential gain, common mode gain, CMRR, input impedance and output impedance. [Section 8.8]         [16]

Q.19 Draw the circuit diagram and the equivalent circuit of capacitive coupled single tuned amplifier and explain its operation. Derive the equation for voltage gain and the 3 dB bandwidth. Sketch also the frequency response of the amplifier. [Section 8.17]     [12]

May-14

Q.20 With neat sketch explain two stage cascaded amplifier and derive its Av, Aj,Rj and Ro. [Section 8.1]         [16]

Q.21 Draw the circuit diagram of an emitter, coupled BJT differential amplifier and derive expressions for differential gain, common mode gain, CMRR, input impedance and output impedance. [Section 8.8]         [16]

(Regulation 2013)

Dec.-14

Q.22 Draw the circuit diagram of an emitter, coupled BJT differential amplifier and derive expressions for differential gain, common mode gain, CMRR, input impedance and output impedance. [Section 8.8]         [16]

May-15

Q.23 Draw the circuit of emitter coupled BJT differential amplifier, and derive expressions for differential gain, common mode gain and CMRR. [Section 8.8] [16]

Dec.-15

Q.24 With neat sketch, explain the BJT differential amplifier with active load and device for Ad, Ac and CMRR. How CMRR can b improved. [Sections 8.8 and 8.9.4]       [16]

Q.25 Explain with circuit diagram class B power amplifier and derive for its efficiency. [Section 8.17] [8]

May-16

Q.26 Explain the common mode and differential mode operation of the differential amplifier. [Section 8.5]         [16]

Dec.-16

Q.27  Explain the  common mode and differential mode analysis of   differential amplifier and derive its CMRR. [Section 8.8]          [13]

May-17

Q.28  Draw the circuit diagram and explain the working of a differential amplifier using FET. Derive the expression for differential mode gain and common mode gain.   Section 8.9.5] [13]

Q.29  Describe the working of class A and class C power amplifier in details with relevant diagrams. (Refer sections 8.15.1 and 8.15.3)        [13]

Dec.-17

Q.30  Explain the  working of a differential amplifier. (Section 8.5)   [8]

Q.31  Compare voltage and power amplifiers. (Section 8.14.4)         [5]

Q.32  Explain the working of a class C power amplifier. (Section 8.15.3)   [7]

Q.33  Discuss the advantages and disadvantages of any there classes of power amplifiers. (Section 8.6) [6]

(Regulation 2017)        

Dec.-18                

Q.34  Draw the frequency response of an ideal     and a practical tuned amplifie and discuss their characteristics. (Section 8.10.1) [7]

Q.35  Compare voltage and power, amplifiers. (Section 8.14.4) [6]

Q.36  Explain the  working of a single ended input differential amplifier (Section 8.5.1) [7]