Biju Patnaik University of Technology 2008-6th Sem B.Tech (B Tech),ester Advace Electronics Circuit . - Question Paper
BPUT(B Tech),6th semester Advace Electronics Circuit ques. paper.
IWL
Sixth Semester Examination - 2008
ADVANCED ELECTRONICS CIRCUITS
Fulf Marks-70
Time: 3 Hours
Answer Question No. 1 which is compulsory and any five from the rest.
The figures in the right-hand margin indicate marks.
1. Answer the following questions : 2x10
"(a) What are the two requirements for oscillation ?
(b) What are Pass band and Stop bands for a filter ?
(c) Define Notch'out frequency.
(d) Give any two applications of Astable Multivibrator.
(e) Draw the output waveform for Colteolor-coupled monostable multi.
(f) Define Transition time of commutating capacitors.
(g) Define Transient response and Steady state response.
(h) Draw the Characteristic waveform of U JT.
(i) Define sweep-speed error, Give an expression.
(j> Name any four methods for generating a time-base waveform,
2. (a) Explain Voltage controlled oscillator with a neat sketch of circuit and output waveforms. 5
<b) For a typical connection diagram of VCO with parameters; 5
+V=12V, R2=1.5 Kohm, R1 = R3=1QKohm and c1=0.001 micro F
(i) Determine the nominal frequency of the output waveforms.
(ii) Compute the modulation in the output frequencies if Vc is varied between 9.5 V and 11,5V.
CP EM 5305 / CPEC 5306 2 Cgrrtd.
3. (a) Draw frequency response curves for
high-pass filler and derive expression for cut-off frequency. 5
(b) Design a higbpass filter at a cut-off frequency o11 KHz with a pass band gain of 2. 5
4. (a) Explain with a neat sketch the operating
principle of Schmitt Trigger circuit. 5 (b) Explain in detail any two applications of Schmitt Trigger circuit with necessary circuit diagrams and waveforms if necessary.
IWL
5
5. (a) Explain with a neat sketch the operation
principle of Emitter-coupled monostahle multi with waveforms* 5
(b) For a emitter-coupled monostable multi circuit with parameters :
Vcc = 1BV, FC1 = 6K, RC2=5K, Re = 4K, R =10OK, Calculate the voltage levels at t = 0+ only. Assume germanium transistors hFE=5Q and rhb-200ohm. 5
6. Explain in detail wilh circuit diagrams and equations the Shunt compensation of a transistor stage in a cascade with identical poles.
10
7. (a) Explain Principle and characteristics of
Tunnel diode with neat sketch* 6
(bj Explain in detail with a neat sketch the Astabte circuit using Tunnel diode. 4
8. (a) Explain the (C555 Timer Monostable
operation with waveforms. Pnovide a neat sketch for this. 7
(b) In a IC555 monostable operation, RA=10Kohmt the ouput pulse width 1p -10 ms. Determine (he Value of C. 3
<
|
Attachment: |
| Earning: Approval pending. |
