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Consider the following signal
x(t) = cos(2*pi*1000t) + cos(2*pi* 2000t) + cos(2*pi*3000t)
Assume a sampling frequency 1/12000
(a) Compute the DFT of the given signal and plot the spectrum of the signal. (Choose thet length so that you can distinguish the frequencies) Note: The plots must be appropriately labeled and show these plots over the range (0,pi).
(b)Let the component at Omega(C) = 2pi* 3000 be the corrupting signal. Design an appropriate lter to lter out this component of the input. You can use fir1 command for this. Plot the frequency response of this lter.
(c) Filter the input signal x(t) using the designed lter. Compute and plot the DFT of the ltered signal. Again the plots must be appropriately labeled and the frequency range must be (0,pi ).
A shunt regulator utilizing a zener diode with an incremental resistance of 5ohm is fed through an 82ohm resistor. If the raw supply changes by 1.0V, what is the corresponding change in the regulated output voltage
Estimate the size and weight of an 1970 automobile using 1970 electronics technology which would have the equivalent computational power and electronics a typical 2013 automobile.
Two equal resistors R connected in series across a voltage source V dissipate power P. What would be the power dissipated in the same resistors when they are connected in parallel across the same voltage source
1. Derive boundary conditions for electric fields (both for tangential and normal components) 2. Derive boundary conditions for magnetic fields (both for tangential and normal components) 3. Why boundary conditions are so important in electromagnetic..
An EEG signal from a healthy adult contains clinically relevant frequencies in the range of 0 to 45 Hz. The frequency bands are generally grouped as delta (0.5-4 Hz), theta (4.5-8 Hz), alpha (8.5-13 Hz), and gamma (30-45 Hz).
An SSB generator has a 9 MHz carrier and is used to pass voice frequencies in the 300- to 3300-Hz range. The lower sideband is selected. What is the approximate center frequency of the filter needed to pass the lower sideband
A 35-year old female worker receives an x-ray exposure of 5.2 rad (whole-body) while carrying out emergency procedures in a nuclear accident. Discuss the health risks assumed by this worker as a result of the radiation exposure.
(a) ZL = 80+j60 , what is the load reflection coecient. (b) Design a short circuit stub matching circuit to match the load to Z0 of 50-ohms. State the distances in wavelengths and in centimeters.
For example, if the time given is 10213 seconds, the function will give back 2 hours and 50.22 minutes. The function shall not print the results to console, but instead pass them back to the calling function.
At a point f in the system, there is an open-circuit fault on phase-a with a voltage across the open-circuit as Vfa , whereas Vfb =Vfc =0. Similar to the calculations of the short-circuit currents by making use of the sequence networks
Consider the analog filter H(s)=30000/(s^2+400s+30000) , notice that the filter gain in the passband is unity or 0 dB. You can also use MATLAB command "roots" to check for the poles that are p_1=-100 rad/s, and p_2=-300 rad/s.
The voltage across the load must remain between 4.7 and 5.0 V for all values of load current. Come up with (draw) a voltage-divider network to supply the load. You may assume that resistors of any value desired are available.
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