Total No. of Questions : 9] [Total No. of Pages : 02 B.Tech. II/ IV YEAR DEGREE EXAMINATION, APRIL/MAY - 2014 (Second Semester) EC/EE/EI Electronic Circuit Analysis Time : 03 Hours Maximum Marks : 70 Q1) a) Define amplifier. b) Define Frequency Response. c) Write applications of BJT. d) What is phase shift. e) Define oscillator. Answer Question No. 1 compulsorily (14 1 =14) Answer ONE question from each unit (4 14=56) f) Define Input characteristics of CE configuration. g) What is multistage amplifier. h) Define power amplifier. i) Define Intigrated circuit biasing. j) What is Trans conductance. k) What is Feed back. l) Define Barkausen Criterion. m) What is MOSFET. n) Define Topologies. UNIT-I Q2) a) Draw and Explain the constructional operation of MOSFET Amplifier. b) Write the differences between Common Source and Common Drain amplifier. (EC/EE/EI 223 (CR)) Q3) a) Draw and Explain of Common - Emitter amplifier, and Draw Input and output Characteristics. N-2731-1- P.T.O.
b) Explain about Bipolar Linear amplifier with suitable diagrams. UNIT-II Q4) a) Explain about High frequency response of Transistor circuits. b) Define Frequency response and calculate Band-width using amplifier frequency response. Q5) a) Draw and explain about FET Frequency response. b) Draw and Explain about Transistor amplifiers with circuit capacitors. [Write any Example]. UNIT-III Q6) a) Draw and explain about power amplifier, and write its applications. b) Describe the analysis and operation about Class- AB push -pull amplifier. Q7) a) Write about Bipolar Transistor current Sources and FET Current Sources. b) Explain about the small signal analysis of active Load circuits. UNIT-IV Q8) a) Write the differences between voltage and current amplifiers. b) Explain about Trans resistance amplifier. Q9) Write short notes on: a) Phase shift Oscillator. b) Crystal Oscillator. R R R N-2731-2-
Total No. of Questions : 9] [Total No. of Pages : 02 B.Tech. II/ IV YEAR DEGREE EXAMINATION, APRIL/MAY - 2014 (Second Semester) EC/EE/EI Electronic Circuits - I Time : 03 Hours Maximum Marks : 70 Q1) Answer the following. a) Compare bridge and full wave rectifier. b) What are PIV and TUF. c) How the transistor can be tested. Answer Question No. 1 compulsorily (14 1 =14) Answer ONE question from each unit (4 14=56) d) What are the advantages of h - Parameters? e) Define gain bandwidth product. f) What are the advantages of multistage configuration? g) Define ripple factor. h) Why CC is called Emitter follower. i) Draw the symbols of N-Channel and P-Channel MOSFET. j) What are the advantages of h - Parameters? k) State Miller s theorem. l) What is Darlington pair? m) Write the applications of CE configuration. n) Write the expression for pinch off voltage of FET. UNIT-I Q2) a) Draw the circuit for a half-wave rectifier. And derive the expression for i) the DC current (EC/EE/EI 223 (RR)) ii) iii) the DC load voltage and the rms current. N-2729-1- P.T.O.
b) Design a full wave rectifier with an LC filter (single section) to provide 9V DC at 100mA with a maximum ripple of 2%. Line frequency f = 60 HZ. Q3) a) A full - wave rectifier with a load resistance of 15KΩ uses an inductor filter of 15 henry. The peak value of the applied voltage is 250V and the frequency is 50 cycle/second. Calculate the D.C load current, ripple factor, and D.C output voltage. b) Draw and explain the circuit diagram of full wave rectifier with L-section filter. UNIT-II Q4) a) With the help of necessary equations, discuss the variations of Av, Ai, Ri, Ro with Rs and RL in Common base Configuration. b) Explain the Emitter coupled difference amplifier. Q5) a) Draw and explain the circuit diagram of boot strapped Darlington circuit. b) Draw the circuit for cascade Amplifier. And also explain its working. UNIT-III Q6) a) Draw and Explain the single stage CE transistor amplifier response. b) Explain different types of hybrid π capacitance of Transistor. Q7) a) Derive the expression for gain band width product. b) Derive the expression for CE short circuit current gain Ai as a function of frequency. UNIT-IV Q8) a) Derive the relation between μ, gm, rd in JFET and define each parameter. b) Design and explain the working of RC coupled amplifier. Q9) a) Write a short note on i) Interacting and ii) Non - interacting b) Design Common Drain FET Amplifier at low frequencies and derive the expression for gain, input impedance and output impedance. N-2729 R R R -2-
P-350 EC-EE-EI-223-CR Total No. of Questions : 09 ] [ Total No.of Pages : 02 II/IV B. TECH. DEGREE EXAMINATIONS, NOVEMBER- 2014 Second Semester EC/EE ELECTRONIC CIRCUIT ANALYSIS Time : Three Hours Max. Marks : 70 Answer Question No. 1 compulsorily. 14x1=14 Answer ONE question from each unit. 4x14=56 1. a) Write applications of BJT. b) What is amplifier. c) Define Oscillator. d) What is Phase Shift. e) Define MOSFET. f) Define Transconductance. g) Define output characteristics of CE configuration. h) What is biasing. i) Define Barkausen Criterion. j) What is Topologies. k) What is Power amplifier. l) Define frequency response. m) What is Bandwidth. n) Write applications of 'BJT'. UNIT - I 2. a) Draw and explain the Single-Stage integrated circuit MOSFET amplifiers. b) Explain about Common-Collector amplifier with suitable diagram and, Draw the characteristics of Common-Collector amplifier. 3. a) Write the differences between common source and common drain amplifiers. b) Explain about Bipolar Linear amplifiers with suitable diagrams. Or UNIT - II 4. a) Define frequency response and calculate Bandwidth using FET frequency response. b) Draw and explain about 'any' Transistor amplifier with circuit capacitors. P.T.O.
P-350 EC-EE-EI-223-CR 5. a) Explain about High frequency response of Transistor circuits. b) Write the difference beween Bipolar Transistor frequency response and FET frequency response. UNIT - III 6. a) Draw and explain about Class-A power amplifier. b) Write the differences between Bipolar current sources and FET current sources. 7. a) Draw and explain about Class 'AB' - Push-Pull amplifier. b) Explain about Integrated circuit biasing and small signal analysis. UNIT - IV 8. a) Draw and explain about Crystal Oscillator, and write its applications. b) Write the differences between voltage amplifiers and current amplifiers. 9. Write a short notes on (i) Transconductance amplifiers. (ii) Phase Shift Oscillator. (iii) Resonant circuit Oscillator. 2
P-349 EC-EE-EI-223-RR Total No. of Questions : 09 ] [ Total No.of Pages : 02 II/IV B. TECH. DEGREE EXAMINATIONS, NOVEMBER- 2014 Second Semester EC/EE/EI ELECTRONIC CIRCUITS - I Time : Three Hours Max. Marks : 70 Answer Question No. 1 compulsorily. 14x1=14 Answer ONE question from each unit. 4x14=56 1. a) List the applications of rectifier. b) Define peak inverse voltage for a diode? c) State the need for regulated power supplies. d) Define R.M.S. value. e) Explain the significance of miller's thermo? f) Define transconductance of JFET? g) Define amplification factor for JFET? h) What is physical origin of two capacitors in the Hybrid it model? i) Define ripple factor? j) What is the significance of bypass capacitors? k) Define harmonic distortion? l) Define frequency response of an amplifier? m) Why FET is called as a voltage controlled device? n) Define gain-band width product? UNIT - I 2. a) Draw and explain the circuit diagram center tapped full-wave rectifier with capacitor filter? b) Compare half-wave rectifier, bridge rectifier and full-wave rectifier? 3. a) Explain the operation bridge rectifier with LC filter with neat diagram? b) Explain the operation of p-section filter and derive the expression for ripple factor? UNIT - II 4. a) Derive the various parameters R i, A v, A i and Ro for a CE amplifier using h-parameter model? b) Explain the working of a emitter coupled difference amplifier? P.T.O.
P-349 EC-EE-EI-223-RR 5. a) Explain the procedure to calculate various parameters for CE amplifier using R e model? b) Draw and explain working of Boot strapped darling-ton pair? UNIT - III 6. a) Define f t and f b? Derive the relation b/w f t and f b? b) Explain the analysis and working emitter follower at higher frequencies? 7. a) Explain CE current gain of an amplifier with resistive load? b) Explain different hybrid-p conductance of a CE amplifier? UNIT - IV 8. a) Explain the working and analysis of two stage RC-coupled amplifier? b) Explain the analysis of common-source amplifier at low frequency? 9. a) Explain the analysis and working of common-gate amplifier at lower frequencies? b) Draw and explain the analysis and working of direct-coupled amplifier? 2