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A square-law modulator for generating an AM wave relies on the useof a nonlinear device. The given figure depicts the simplest form of such amodulator. Ignoring the higher order terms, the input-output characteristics of thediode-load resistor combination in this figure are givenby: v2 (t) = a1*v1(t)+ a2* v12(t)
Where,v1(t)=Ac cos(2pfct )+m(t)Where v1(t)is the input signal, v2(t) is the output signaldeveloped across the loadresistor, and a1 , a2 are constants.
a) Determine the spectral content of the output signal. FT
b) To extract the desired AM wave from v2(t) , we need a band-passfilter. If we were to insert this filter in the figure, determine the cut off frequencies of the required filter, assuming that the message signal is limited to the band: W= f =W .
c) To avoid spectral distortion by the presence of undesiredmodulation products in v2(t), the condition W= f = 3W must be satisfied;validate this condition.
An LVDT with associated signal conditioning will be used to measure work-piece motion from -20 to +20 cm. The static transfer function is 2.5 mV/mm. The output will be interfaced to a computer via an ADC.
a parallel plate transmission line is made up of perfect conductors of width w = .2m and d = .01m. The medium between the plates is a diaelectric of epsilon = 2.25*(epsilon not) and mu = mu not. For a uniform plane wave propagating down the line
Use the table on slide 11 of this lecture and determine the line parameters L and C of the transmission line. Consider that the TL is lossless and µ = µ0 for polystyrene. Then find the characteristic impedance of the line Z0, phase velocity
A 1 F capacitor is being charged through a 100 Ohm resistor. How long will it approximately take for the capacitor to reach about 63% of its final charge
The average voltage across the load when the triggering angle is 140 degrees. Keep in mind that the conduction is incomplete when the triggering angle is greater than 140 degrees.
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.
Find the dimension of the window, as measured at the top of the oxide, after ideal isotropic etching (i.e. no overetch). Draw a cross section of the window opening with the resist still on.
what is the new resistance level of a copper conductor wire if the lenght is changed from 200 ft to 400 ft, the area is changed from 50,000 CM to 0.10 in ^2 and the original resistance was 7 ohms
Determine the maximum theoretical power that can be developed by the turbine, in kW, and the corressponding exit temperature. If the steam exits the turbine at 250 degree C and 0.5 MPa, determine the isentropic efficiency.
In animation programs, special effects are achieved by changing the properties of objects. What instruction is used to change the opacity and color properties of objects in the Zeus example world?
one group of students made an error by using HCLinstead of H2SO4 to titrate an unknown solution of NaOH. Would this error change the calculated molarity of the NaOH solution.
What should the signal definitions be for the equations, such that the minimal about of hardware (gates) are used assuming we have an abundance of NAND gates Show the signals definitions and resulting circuitry.
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