GITAM University 2005 B.E Electronics & Tele-Communication Engineering Advanced Network Theory - Question Paper

College of Engineering
Gandhi Institute of Technology and Management, Visakhapatnam
(Affiliated to Andhra University)

B.E.(Electronics and Communications Engineering)
2nd Year 2nd Semester exams 2005-2006
(Autonomous Stream)

EC 225: Advanced Network Theory

Time: three Hours Max. Marks: 60


1. Answer ques. No. one ( Part – A) and any 4 of the remaining 7 (Part – B)
2. All parts of a ques. must be answered in 1 place, otherwise they will not be valued.
3. Figures in the right hand margin indicate marks allotted.


PART – A

1. Answer the subsequent in 1 or 2 phrases each (10x2=20)

a) Define design impedance and phase angle of constant K-low pass filter.
b) Mention 4 properties of L.C impedance function.
c) Define the terms phase shift and attenuation constant.
d) What are the various kinds of band pass filters.
e) Differentiate ranging from symmetrical network and asymmetrical network.
f) Give 2 properties of positive real functions.
g) Give the design constant of T kind attenuator.
h) Mention the tests to establish the positive real nature of a rational function.
i) Give any 2 properties of RC network driving function.
j) Draw the diagram of 1st foster form of a RC network.


PART – B



ans any 4 of the subsequent. If you attempt more than 4 questions, only the 1st 4 in order will be valued


2. A T part low pass filter has an inductance of 30mH in every of the series arms and a shunt arm capacitance of 0.25µF. compute the cut off frequency, characteristic impedance, input and output voltage ratio and phase shift at five KHz. (10)
3. Obtain expressions for m-derived high pass filter in T and Pi form. (10)
4. Design a composite H.P T part filter to operate into a load impedance of 600 ohms cut off frequency 1.5 KHz and f8 = 1.4 KHz. (10)
5. Analyse proto kind high pass filter. (10)
6. Discuss in detail about
a) Bridged T attenuation equalizer. (5)
b) Bridged T phase equalizer. (5)
7. Consider the subsequent polynomial
P(s) = s6+4s5+8s4+20s3+19s2 +16s +12 (Here numbers left side of s denotes coefficient & right shows exponent)
Is it Hurwitz Polynomial? (10)
8. Obtain the 2 Cauer forms of function Z(S)=[(s*S+1)(s*s+3)]/(s(s*s+2)(s*s+4)} [10]

Earning:   Approval pending.