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HW10 Solutions ECE2100 Autumn 2014
Problems start from next page
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Problem 1: Determine the inverse Laplace transform of F(s) without using MATAB:
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Problem 2: Determine the inverse Laplace transform of the function given in Prob. 1 by using MATLAB.
>> n = [0, 0, 0, 6];>> d = [1, 10, 32, 32];
>> [r, p, k] = residue(n, d)
r = ‐1.5000 ‐3.0000 1.5000
p =
‐4.0000 ‐4.0000 ‐2.0000
k =
[]
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Problem 3: Determine the inverse Laplace transform of F(s) without using MATLAB.
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Problem 4: Determine the inverse Laplace transform of F(s) without using MATLAB.
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Problem 5: Determine the inverse Laplace transform of F(s) without using MATLAB.
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Problem 6: Determine iL(t) for t >= 0+ using the s‐domain. What is the zero‐state and zero‐input part of iL(t)? Use the "inductance impedance in series with the voltage source" model when going to s‐domain for the inductance . Use mesh analysis to solve the circuit.
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Problem 7: Determine vR(t) for t >= 0+ using the s‐domain. Use the "capacitance impedance in parallel with the current source" model when going to s‐domain for the capacitance. Use node analysis to solve the circuit.
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Problem 8: Determine the s‐domain Transfer function H(s) for the LTI system given below. Determine all the poles and zeros of this system. Determine the Magnitude Frequency response M(w). Is this a low pass or a high pass filter? Determine the corner frequency in radians/sec.
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Problem 9: Based on the transfer function H(s) obtained in Problem 8 determine the impulse response of the LTI system given in that problem. Determine the step response of the system by utilizing the transfer function H(s).
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Problem 10: Determine the s‐domain Transfer Function H(s). From this transfer function determine the Magnitude Frequency Response M(w). Plot M(w) in MATLAB from w = 9 rad/sec to w = 11 rad/sec. Is this a LP, BP or HP filter? From the MATLAB plot determine a rough value of the bandwidth of this filter.
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>> R=100;>> C=0.01;>> L=1;>> w_min=9;>> w_max=11;>> w=[w_min: (w_max‐w_min)/100: w_max];>> M = (1/L*C)./sqrt( ( (1/(L*C)) ‐ w.^2 ).^2 + (w./(R*C)).^2);>> plot(w,M)
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