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An analog signal xa(t) is bandlimited to the range 900 = F = 1100 Hz. It is used as an input to the system shown in figure. In this system, H(?) is an ideal lowpass filter with cutoff frequency Fc = 125Hz.
(a) Determine and sketch the spectra for the signals x(n), ?(n), v(n), and y(n).
(b) Show that it is possible to obtain y(n) by sampling xa(t) with period T = 4 milliseconds.
A voltage divider has a 5 V source and two 150 kilo ohm resistors. What is the voltage across(a) an ideal voltmeter (b) a voltmeter with an input resistance of 10 mega ohms
A system is described by the differential equation ty'(t)-8y(t)=x(t). Classify the system as to linearity, time-invariance and stability. Show that a system with exicitation x(t) and response y(t) described by y(t)=u(x(t)) is nonlinear, time invari..
If it takes 3.52 s for 10.0 mL of helium to effuse through a hole in a container at a particular temperature and pressure, how long would it take for 10.0 mL of oxygen, O2, to effuse from the same container at the same temperature and pressure
the series resistances causes a voltage dropwhen a current is drawn from a solar cell. by convention the positive
Two parallel plates separated by 0.20 m are connected to a 12volt battery. An electron released from rest at a location 0.10 mfrom the negative plate. when the electron arrives at a distance0.050 m from the positive plate
a remote door lock is operated by an electrical relay that requires 10 ma. the relay can be opened by either switch a
Calculate the received power and the path loss. Assuming this is the maximum acceptable path loss for the system, how does the maximum system range change at 1 GHz and 10 GHz, assuming all other parameters remain constant
A 150 MVA, 24 kV, 123% three-phase synchronous generator carries the rated load at a power factor 0.83 (lagging). Calculate the necessary excitation voltage and input complex power.
We can model the human body as a voltage source in series with a high resistance, let's say 10mV in series with 100kOhms. If we use an instrument with 1MOhm input resistance, what voltage value will we measure
Amplifier with input resistance of 100k Ohm, an open circuit voltage gain of 100 V/V and output resistance of 100k Ohm is connected between a 10k Ohm signal source and 1k Ohm load. Find the overall voltage gain Gv and also find the current gain
if the equation for a mesh current is done and the current comes out negative, with the assumed clockwise direction. does that mean that the current is actually going in the opposite direction
Two Parallel single-phase loads are supplied by a 480 volt RMS, 60 Hz, source. The two loads are: Load 1 : 15.0 kW at .6 lagging p.f. Load 2 : 25.0 kVA at .8 lagging p.f. 1) the combined real power drawn y the loads in Kilowatts
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