Biju Patnaik University of Technology 2008-7th Sem B.Tech (B Tech),ester advanced electronics circuit . - Question Paper
BPUT(B Tech),7th semester advanced electronics circuit ques. paper.
Total number of printed pages -4 B. Tech
CPEN 5303
Seventh Semester Examination - 2000
ADVANCED ELECTRONICS CIRCUITS Ftil'l Marks-70
* Tfme;3*Hours
Answer Question No. 1 which is compulsory and any five from the rest
The figures in the right-hand margin indicate marks.
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1. Answer the following questions : 2*10
(a) How can a low pass fiTier be converted to a high pass filter ?
(b) What is a VCD ? Give two applications that require a VCO,
(e) Wbal is an instrumentation amplifier ? Give two applications of instrumentation amplifier.
(d) What Is lihe rofe of a low pass filler and VCO in PLLs ?
(e) Give three important applications of TunneJ diode.
<f) What is done to change the state of a bistable muflivibrator ?
(g) What are commutating capacitors ?
(h) What do you mean by 3-dB cut off frequency of a filler ?
(i) Distinguish between active fitters and passive filters;
(j) List the characteristics of an instrumentation amplifier
2. (a) Whal is the function of oscillator and how are they classified ? Draw the schematic diagram of a Wein-bridge oscillator and explain it, 5
(b) A certain Wein-bridge oscillator uses R = 4.7 Kn , C= 0.01 M F, and RF =2Rr What is the frequency of oscillation ? 5
3. (a) What is a universal active filter? Explain
with an example and give block diagram and connection diagram, 5
(b) Using the above example, design a 2nd order non- inverting Butterworth low pass filter with 10 KHz Cut off frequency! a gain of 10. Q = 5, and Vs = 15V, 5
4. List important features of the IC 555 tinner. Briefly explain the differences between the two operating modes of this timer* Draw circuit diagram and input and output waveforms for both the modes. 10
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5. (a) U'JT exhibits negative resistance charac
teristics. Justify. 5
(b) Explain in detail the application of UJT as a saw tooth wave generator. 5
6. {a) Explain with a neat sketch the operation
principle of collector-coupled monostable multi with waveforms. 5
CPEN 5303 3 P*T.O.
(b) A collector-coupled monostable mufti has the following parameters: Voc = 2V, Rc= 2K, R, - H2 = R 20K, hFE - 20, rbb. =2000, and C = 1OO0pF. Neglect forward-biased junction voltages and lcao. In the quasi-stable state G1 is to be in its active region with a collector current of 4mA. Find VB0* 5
7, (a} Explain in detail the monosfable operation of a tunnel diode. Give circuit diagram and waveforms, 5
(b) What is the need of low frequency compensation in amplifiers ? Explain in detail.
5
9. (a) Explain in detail about vottage time base generator with circuit diagram and waveforms, 5
(b) Explain in detail a fixed bias npn transistor binary. 5
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| Earning: Approval pending. |
