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in the future - u will be able to do some more stuff here,,,!! like pat catgirl- i mean um yeah... for now u can only see others's posts :c
In the interconnection of ideal sources shown
in the figure, it is known that the 60 V source is
absorbing power.
Which of the following can be the value of the
current source I ?
a) 10 A (c) 15 A (b) 13 A
(d) 18 A
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Problem 1. Suppose we have a continuous-time signal x(t) = 1 t cos (200πt), −∞ < t < ∞. We want to convert 1000
x(t) into a discrete-time signal y[n] where we sample the signal every t = nTs seconds for n = {0, 1, 2, . . .}. a. Determine the frequency fo of the cosine in Hertz and its corresponding period (T = 1/fo).
b. Plot the continuous signal x(t) for t = [0,4T] seconds so that four periods of the signal are plotted (use the plot command).
c. Now, assume that Ts = 1 and sample x(t) to yield y1 [n]. Plot the discrete signal y1 [n] for n = {0, 1, 2, 3, 4} 100
samples (use the stem command).
d. Now, assume that Ts = 1 seconds and sample x(t) to obtain y2[n]. Plot y2[n] for n = {0, 1, 2, . . . , 16} samples
400
(use the stem command).
e. Having sampled the same continuous signal at these two different sampling rates, what do you observe about
each sampled sequence? Does anything seem problematic about either one?
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