ESC201A-Endsem_paper 2015.pdf

Fig4 problem6 50 obtain the expression for 2 j h

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Fig.4

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Problem6: [5.0] Obtain the expression for 2 ) ( j H corresponding to its Bode magnitude plot shown in Fig.5. Fig.5 Problem7: [2.0+2.0+2.0+2.0] Determine the impedance parameters 22 21 12 11 , , , Z Z Z Z of the two-port network in Fig.6. Assume that the op-amp is ideal and not saturated. Fig.6 The impedance parameters are defined as: 2 1 22 21 12 11 2 1 I I Z Z Z Z V V
Problem8: [4.0 + 2.0] (i) Find the transfer function H ( ω ) of the circuit below in Fig. 7 below. (ii) Hence find the frequency corresponding to a gain of 3 dB relative to the minimum gain of the transfer function. Fig.7 Problem9: [3.0+3.0+3.0+1.0=10.0] The circuit in Fig.8 shows a instrumentation amplifier whose gain can be adjusted by changing resistance G R only. The current through R G is i G . Find (i) i v , (ii) G i , (iii) o v in terms of 1 R , 2 R , G R , 1 i . Hence find the voltage gain (iv) i o v v v A in terms of R 1 , R 2 , R G . R 1 R 1 R 2 R 2 R 2 R 2 R G V i V o i G i 1 Fig.8
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