Deemed University 2009 A.M.I.E.T.E Electronics

g. Determine the z-parameters of the network
shown in Fig.3
(A) 5, 8, 12, 0
(B) 13, 8, 8, 20
(C) 8, 20, 13, 12
(D) 5, 8, 8, 12

h. The condition AD–BC=1 for a 2 port network implies that the network is a

(A) reciprocal network. (B) lumped element network.
(C) lossless network. (D) unilateral element network.

i. The value of the resistance R in Fig.4 shown is adjusted such that the power dissipated in the 2O resistor
is maximum. Under this condition

(A) The value of R is zero ohm.
(B) The value of R is four ohms.
(C) The power dissipated in the
two ohms resistor is18W.
(D) The value of R is two ohms.




j. The value of R in the Fig.5 is adjusted
so that Power developed by the voltage
source is zero Watt. The value of R is

(A) .
(B) .
(C) .
(D) .


ans any 5 ques. out of 8 ques..
every ques. carries 16 marks.



Q.2 a. For the network shown in Fig.6, determine the numerical value of the branch current i1. All the sources in the network are time invariant.






(8)




b. With switch K in a position a, the network shown in Fig.7 attains equilibrium. At time t=0, the switch is moved to position b. obtain the voltage across R2 as a function of time.


(8)



Q.3 a. In the network shown in the Fig.8, a steady state is reached with the switch K open. At t=0, the switch is closed.
For the element values given,
determine the value of Va(0–) and
Va(0+). (8)








b. Use the Thevenin equivalent of the network shown in Fig.9 to obtain the value of R which will receive maximum power. obtain also this power. (8)




Q.4 a. provided the ABCD parameters of 2 port network determine its Z parameter. (8)

b. obtain the y-parameters of the circuit shown in Fig.10. (8)











Q.5 a. State the Hurwitz criteria for stability. Determine whether the provided polynomial is Hurwitz or not? (8)

b. discuss the following:
(i) phasor (ii) Resonance
(iii) Q (iv) Damping coefficient (8)



Q.6 a. For the shunt peaking circuit shown in Fig.11 that the admittance Y(s) is of the form express s1, s2 and s3 in terms of R, L and C. (8)


(8) (8)

b. Determine the amplitude and phase for F(J1) from the pole-zero plot in s-plane for the network function (8)



Q.7 a. Check whether the function is a positive real function. (8)

b. Using Kirchhoffs laws to the network shown in Fig.12, determine the values of and . Verify that the network satisfies Tellegens theorem.



Q.8 a. obtain the networks for the subsequent function in I Foster and I Caver form . (8)
b. Synthesize the voltage ratio as a constant resistance bridged-T network terminated in a 1O resistor. (8)



Q.9 a. The input impedance for the network shown in Fig.13 is .
If Zo is an LC network:
(i) obtain the expression for Zo.
(ii) synthesize Zo in a Foster series form. (8)




b. Synthesize the third order low pass Butterworth filter terminated in a 1O load resistance. (8)

Earning:   Approval pending.