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Two semiconductor materials have exactly the same properties except that material A gives photoluminescence at 1240nm and material B at 1033nm. Determine the ratio of ni for material A to that of material B for T=300K.
Identify how one can generate pulse width modulation using the 9S12DG256 microcontroller. Identify various applications that require PWM. Show how microcontroller PWM interface is used to drive servomotors, and discuss these motors.
use an ideal op amp to design an inverting integrator with an input ressistanceof 10 kilo ohm and an integration time constant of 10^-3. What is the gain magnitude and phase angle of this circuit at 10rad/sand 1rad/s.
A network router connects multiple computers together and allows them to send messages to each other. If two or more computers send messages simultaniously, they collide and the messages must be resent. Design a collision free circuit for a router..
a) the synchronous generator has a unique ability whihc places it at the top of the heap of all machines that might be used for generation of electric power. This unique capability is what allows the business of electric dispatch to even occur.
Using the message signal m(t) = 1/(1+t^2) , determine and sketch the modulated signals for the following methods of modulation: (c) SSB modulation with only the upper sideband transmitted. (d) SSB modulation with only the lower sideband transmitted.
What are the names of the three regions of the bipolar junction transistor? Why is there a thin region of one material type
A proportional control system id to be used to control the wing flaps of a jet airplane. The wind load is expected to cause as much as 600 in*lb of torque. The system should be able to keep the flaps to within 5 degrees of the set point.
Calculate the Fourier Transform of f(t) = 5 sinc(-2t/100), and graph the magnitude and phase as a function of f.If the signal of problem 1 is delayed by 0.1 ms. What is the new Fourier Transform. Graph it's magnitude and phase as a function of f.
you borrowed $10000 from a local bank with the agreement that you will pay back the loan in five years the pay back plan includes two parts: a graduated payment plan with the first payment set at 1500 at year 1 and a gradient of $600 afterward
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.
You are required to determine that this next generation transmission system will require a spectral efficiency of 5 bits/sec per Hertz.
Suppose the suspension system of the average car can be fairly well modeled by an under damped harmonic oscillator with a natural period of 2 seconds. How far apart should speed bumps be placed so that a car traveling at 10 miles per hour
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