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E(jø) 0 Figure 4: Fourier transtorm 01 e(t).Problem 15: (20 points) Consider the sampled-data system shown in Figure 8, where Gho(s) is the transfer function representation of the zero-order hold D/A converter that reconstructs the signal e(t) from the samples e(k) Figure 8: Sampled-data system with ideal sampler and zero-order hold (ZOH) digital-to-analog converter 1. (0 points) Show that the magnitude spectrum of Gho(u) is Twlws where ws = 2π/T. 2. (8 points) Suppose e(t) has the amplitude spectrum given in Figure 4 and that T-2π/3.。. Sketch E u) and ļGho(xu)l on the saine plot. 3, (3 points) Based on your sketch in part 2, why is е(t) not an exact representation of e(t)?

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