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- Analog Electronic Circuits - AEC
- 2017
- PYQ
**Biju Patnaik University of Technology Rourkela Odisha - BPUT**- Computer Science Engineering
- B.Tech
**20636 Views**- 344 Offline Downloads
- Uploaded 1 year ago

Registration No: Total Number of Pages: 02 B.Tech PCEC4201 3rd Semester Back Examination: 2017-18 ANALOG ELECTRONIC CIRCUITS BRANCH: AEIE, CSE, ECE, EEE, EIE, ELECTRICAL, ETC, IEE, IT Time: 3 Hours Max Marks: 70 Q.CODE: B1166 Answer Question No.1 which is compulsory and any five from the rest. The figures in the right hand margin indicate marks. Q1 a) b) c) d) e) f) g) h) i) j) Q2 Q3 a) Answer the following questions: With mathematical equation and suitable sketches show that operating point varies with RC (load). State the difference between FET and BJT. Derive the relationship between and in BJT. What is Barkhausen Criterion to sustain oscillation? An amplifier with voltage gain of 60dB uses 1/20 of its output in negative feedback. Calculate the gain with feedback in dB? Draw Darling pair and write its application. What is the need of current mirror? Draw one circuit. What are the minimum values of gain in inverting and non-inverting amplifiers? What do you mean by CMRR of an OPAMP? What is virtual ground? What is its effect on an op-amp operation? b) In a BJT fixed bias circuit β=150,VCC=10V,RC=1KΩ,RB=100 Cin=Cout=10µf, CE=100µf. Determine the Q-point of the circuit. Derive an expression for total collector current in CE configuration. a) Show that the transconductance gm of a JFET is related to the drain current IDS given by g m b) Q4 a) b) Q5 (a) (2 x 10) 2 VP KΩ, (5) (5) (5) I Dss I Ds , where the symbols have their usual meanings. What is stability factor? Write the general Expression for S ICO and S . (5) Design a voltage divider circuit using a supply 24V, β=110 and an operating point of ICQ=4mA and VCEQ=8V. Choose VE=1/8 VCC. Draw and analyze a D-MOSFET configuration. Why is it called so? (5) For a class B amplifier providing a 22-V peak signal to an 8- ohms load and a power supply of Vcc = 25 V, determine Input power Pi(dc) Output Power Po(ac) Circuit Efficiency. (6) (5)

(b) (4) For the above circuit, determine Zi, Zo , Av , Ai using h-parameters model. Derive the formulae used. Q6 a) Derive the expression for calculation of overall band width of multistage amplifier due to frequency effect. For non interacting stages. Explain frequency response of BJT amplifiers. (5) Q7 Derive the conditions for the oscillations in a RC phase shift oscillator. What type of waveform does it generate? (10) Q8 Write short answer on any TWO : Integrator and differentiator Cascade and cascode amplifier Class-B amplifier Crystal Oscillator b) a) b) c) d) (5) (5 x 2)

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