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Modify the simulation program given in Computer Example 3.4 to allow the sampling frequency to be entered interactively. Examine the effect of using different sampling frequencies by executing the simulation with a range of sampling frequencies. Be sure that you start with a sampling frequency that is clearly too low and gradually increase the sampling frequency until you reach a sampling frequency that is clearly higher than is required for an accurate simulation result. Comment on the results. How do you know that the sampling frequency is sufficiently high?
Example 3.4
The preceding example demonstrated the required amplitude response of the VSB filter. We now consider the phase response. Assume that the VSB filter has the following amplitude and phase responses for f > 0:
Reflect upon the strengths, weaknesses, opportunities and threats associated with a business that you are familiar with (one you work at, one you completed your assignments on, or one you have just acquired knowledge about).
During an all-night cram session, a student heats up a 0.491 liter (0.491 x 10- 3 m3) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 19.7 °C, and the beaker is filled to the brim.
Determine (a) the maximum current and the time at which it occurs; (b) the settling time; (c) the time t corresponding to the resistor absorbing 2.5 W of power.
The dielectric materials used in real capacitors are not perfect insulators. A resistance called a leakage resistance in parallel with the capacitance can model this imperfection. A 150-F capacitor is initially charged to 100 V.
For radio channels the constellation size is often 4, for moderate signal to noise ratios. for such a constellation size in a 5 MHz channel using QAMP with no intersymbol interferance, what is highest bit rate ?
A clever student notices that a high constant loop gain would make the PLL converge in frequency and phase. Rather than use an amplifier with infinite gain the student decides to just use an unstable filter.
Vibration signal of the acceleration response from a simple supported beam ("vbrdata.dat"), sampling rate = 1,000 Hz. From the spectral plot, determine four dominant frequencies (modes).
The design specifications for a simple inverting amplifier require an input resistance of 10kOhm and a voltage gain, A=-6.2 a) prepare a design using an ideal OpAmp b)If a real OpAmp with the properties: Ri=2MOhm, A=200k, Ro=75Ohm
A 9 GHz parallel polarized wave with an amplitude of 20 V/m is obliquely incident from air (z 0). Theta_i equals a 60-degree angle of incidence.
Convert the designed prototype filter to highpass filter with cutoff frequency f_C=10,000 Hz, with 30 db attenuation at f_S=1000 Hz. Determine the transfer function of the filter.
Derive the relationship between the voltage across the 1 resistor and the magnetic intensity, H. Hint: explore the relationship between magnetomotive force and magnetic intensity as discussed in the overview.
write a program that implement the system difference equation recursively, in "real-time" fashion, including the recursive update of variable samples(shift register). Compute and plot the response to x2[n] and x3[n], for one of the two systems, fo..
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