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An AM system has a carrier frequency of 20 kHz and carrier amplitude 10.m(t) = Sa (4000πt)
(a) Find and sketch the spectrum of the information signal. What is the bandwidth of the information signal (choose an appropriatedefinition for the bandwidth in each case)?(b) Write a time-domain expression for the modulated carrier.Include all known information.(c) Find and sketch the spectrum of the modulated carrier. What is the bandwidth of the modulated carrier.(d) Use MATLAB to plot the modulated carrier.
A 150 MHz uniform plane wave in normally incident from air onto a material whose intrinsic impedance is unknown. Measurements yield a standing wave ratio of 3 and the appearance of an electric field maximum at 0.3 wavelengths
A device with input x(t) and output y(t) is characterized by: y(t) = x2(t).An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5kHz is applied to this device. What is The bandwidth of the output signal.
A steel tire, 10 mm thick, 80 mm wide, and 1500.0 mm inside diameter, is heated and shrunk onto a steel wheel 1500.5 mm in diameter. If the coefficient of static friction is 0.30, what torque is required to twist the tire relative to the wheel
If non-ideal interface trap density of Dit = 5x1010/cm2/eV is to be considered, what is the shift in the flat band voltage. Assuming all interface traps are acceptor-like (negatively charged if filled with an electron and neutral if empty)
A school has 100 lockers and 100 students. All lockers are closed on the first day of school. As the students enter, the first student, denoted by S1, opens every locker. Then the second student, S2, begins, with the second locker denoted L2, and ..
The phasor voltage Vab in the circuit is 480 /0° V (rms) when no external load is connected to terminals a,b. When a load having an impedance of 100 j0 Ω is connected across a,b, the value of Vab is 252.9822 /-18.3449° V (rms).
The z-transform X(z) of a causal sequence x[n] has a zero at z1 = 0 and three poles at p1 = 3/4 and p2,3 = (1/2)(1 ± j). Determine the z-transform Y(z) of the sequence y[n] = x[n + 3], its pole-zero pattern, and its ROC.
A solar pond consists of a thin layer of fresh water floating on top of a denser layer of salt water. When the salty layer absorbs sunlight it warms up and much of that heat is held there by the insulating effect of the fresh water above it
Determine the Laplace transform of f(t) = +5e^-4t + 12sin 3t. If the voltage across a 2 F capacitor is initially zero, what is the instantaneous power if the current is A?
Considering an ideal transformer with impedance on the secondary, neglecting the winding resistances, leakage inductances and the core loss. N1/N2=3 For a voltage of 120V (rms) at a frequency of 60 Hz applied to winding 1
Connect a voltage divider to an output of a DC power supply. Design it to give an output that is 1/3 of the supply voltage. Furthermore, neither the power ratings of the resistors nor the current rating of the supply are to be exceeded.
During the k^th sampling interval of a CVSD modulation scheme, the current value of input x(k) is 1000, the previous value of approximating staircase function x f(k-1) is 990, and the current value of ä(k-1) is 30
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