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Write a computer program to solve the dispersion relation V(1-b)^0.5 =mπ+arctan(b/(1-b))+arctan((b+a)/(1-b)). (a) We wish to fabricate a planar waveguide in GaAs (n = 3.6) for light of wavelength λ = 1.3 μm that will operate only in the fundamental mode. Assuming the cover layer is air and the substrate has a refractive index ns = 3.5, what range of the GaAs layer thickness can be? (b) If we want to achieve maximum confinement for the waveguide in (a), what should we choose for the thickness of the GaAs layer? What is the corresponding effective guide index for the light? (Note: You can refer to the figure shown in page 19 of the supplementary slides for maximum confinement, or you can generate the curves and solve for the result yourself. Then use the program you wrote for (a) to solve for the effective guide index.)
Voltage regulator utilizes a 500 mW Zener diode with Vz=6.7V at 20mA, rz=lOohm and IzK=5mA. The supply voltage y+ has a nominal value of 12V but can vary by ± 1 V. The load resistor is fixed at 330ohm
how does the current mode control works in a boost converter if I assume induction current is sensed and used to generate thePWM. what is the transfer function ΔVc(s) / ΔIref(s),where Iref is the reference current given to the comparator
Defibrillator machines are used to deliver an electric shock to the human heart in order to resuscitate an otherwise non-beating heart. It is estimated that a current as low as 17 mA through the heart is required to resuscitate.
For computer chip of 10mm (length), 5 mm(width) is operated by power of 0.645 watt, which surrounded by coolant material of temp of 80 F. Find the Surface Temperature in K of the computer chip during the heat transfer of convection.
refer to the oscilloscope trigger setting. what could happen to the waveform display if the negative slope were to be
an abc-phase sequence three-phase balanced wye connected 60 Hz source supplies a balanced delta-connected load. the phase impedance in the load consists of 20 ohm resistor in series with a 50 mh inductor and the phase voltage at the source
a) How much total power is incident on the state of Colorado on a sunny day. Compare this to the average electrical energy consumption of the United States which is on the order of 10^12 Watts. b) Find the peak electric and magnetic fields of solar..
An 8 bit shaft encoder is used to give the rotary position of a robot arm. What is the shaft encoder's value just before, and just after, the arm sweeps past 90 degrees while moving clockwise What is the sensitivity of the system
Which type of I/O has the disadvantage that part of the address space must be given up to implement I/Oports
a load consisting of induction motor is draming 80 kw from a 220 v ,60 hz power line of 0.72 lagging .find the capacitance of a capacitor required to raise the pf to 0.92
Design the electrical system for a shopping center with 500,000 square feet at least 30 spaces of three different sizes (5,000, 10,000 and 25,000 sf). They may be offices, banks, restaurants and shops.
Devise a circuit that could be used with a conveyor belt which is used to move an item to a work station. The presence of the item at the work station is detected by means of breaking a contact activated by a beam of light to a photo sensor.
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