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Previous Year Exam Questions of Analog Electronic Circuits of bput - AEC by Verified Writer

  • Analog Electronic Circuits - AEC
  • 2017
  • PYQ
  • Biju Patnaik University of Technology BPUT - BPUT
  • Electronics and Communication Engineering
  • B.Tech
  • 102 Offline Downloads
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Registration No: Total Number of Pages: 02 B.Tech. PET5J008 5th Semester Regular Examination 2017-18 Advanced Analog Electronic Circuit BRANCH: ECE, ETC Time: 3 Hours Max Marks: 100 Q.CODE: B463 Answer Question No.1 and 2 which are compulsory and any four from the rest. The figures in the right hand margin indicate marks. Q1 Answer the following questions: multiple type or dash fill up type The flip-flop circuit components must be chosen so that under maximum load which the binary devices, one transistor remains in ----------- while the other is ----------------. Commutating capacitors, also called ------------- or ------------- capacitors are used to increase the speed of operation. The resolution time of a binary can be improved by --------------- and ----------. Astablemultivibrator can be used as a ------------ to ------------ convertor. In bootstrap circuit, the gain A of the -------------amplifier should be ------. The output of a time-base generator is called the -------- and the time-base generators are called --------------. In simple current time-base generator when the resistance of the coil and the resistance of the transistor in saturation are considered, a --------- voltage rather than a ------------ voltage is applied across the inductor to obtain a liner current. Tunnel diode is ----------- and UJT is ---------- type of devices. PLL goes through ---------,----------, and ----------- states. The duration of pulse is determined by the -------network connected -------- to the 555 timer. (2 x 10) (2 x 10) f) Answer the following questions: Short answer type What do mean by linear wave shaping? Why sinusoidal waveforms are popular? What do mean by cut-off frequency? Write the expression for the upper cut-off frequency of a low pass filter? What is the relation between rise time and band width of a low pass filter? For an RC low-pass circuit, If RC =15 T, find out the phase shift between input and output? What do mean by a multivibrator? How many states does it have? g) What is the basis for selection of various components of a multivibrator? h) i) What are the advantages of a self-biased binary over fixed biased binary? What do mean by loading of a binary? What are its effects on the performances a binary? Write the expression for the maximum frequency of operation fmax of fixedbiased binary with a commutating capacitor c? a) b) c) d) e) f) g) h) i) j) Q2 a) b) c) d) e) j) Q3 a) b) Classify active filter on the basis of their frequency response? Derive the cutoff frequency of these filters? Design a low pass active filter at cut-off frequency of 1 KHz and pass band gain of 4. Plot the approximate frequency response and analyze your results? (10) (5)

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Q4 a) b) Q5 a) b) Q6 a) b) Q7 a) b) Q8 a) b) Q9 a) b) With proper circuit diagram discuss the detailed operation of collector coupled bistable-multivibrator. Using proper assumption find out all the stable state voltages and currents. What do mean by speed-up capacitor? Derive a suitable expression for this ? (10) Explain the operation of UJT? Briefly explain how UJT is used to operate as bistable, monostable and astablemultivibrators. Discuss the triggering mechanism in the bistablemultivibrator. (10) What are the different methods for generating a voltage time base generator? Explain any one method for generation of time base wave form? Define the terms slope error, displacement error, and transmission error? Derive a suitable relation between these errors? (10) Explain the operation of collector coupled Astable-multivibrators? Derive the expression of frequency of oscillation of an astable-multivibrator? Silicon n-p-n transistor with hFE(min) =40 are available. Design an astablemultivibrator to generate a squre wave of 1 KHz frequency with duty cycle of 25%. (10) With complete connection diagram explain the operation of 555 timer. Explain the operation of monostablemultivibrator using 555 timer. Difference between UJT and Tunnel diode. (10) Discuss the detail operation of individual block of a discrete PLL. Write down the advantages, disadvantages, and applications of an instrumentation amplifier. (10) (5) (5) (5) (5) (5) (5)

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