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1) For a semiconductor E vs kx near the band edge Ec is given by E=Ec +(h2/16m0)*kx2 Determine the effective mass of electrons in the conduction band. Here m0 is the mass of a free electron.2) E vs. kx for electrons near the valence band edge Ev can be approximated byE=Ev-0.1(h2/4m0)*kx2Find the effective mass of holes in this material.
in step index fiber the core of diameter D has a refractive n1, which is typically equal to 1.48. core is typically surrounded by the cladding of slightly lower index. Where n2=n1(1-delta). The parameter is simply called the index difference.
(a) show that the energy in the field of an electric dipole of moment p outside a sphere of radius R is \(p^{2}/(12\pi\epsilonR^{3})\) (b) calculate the potential energies of an electric dipole (c) calculate the potential energies of a linear electri..
A.) We would like to use a series lumped element b to match this load. What is the length of the line where the normalized input impedance is z= 1-jb(d/\lambda). If the rfequency is 1GHz , find the value of the lumped element(C or L).
The Fourier transforms of odd and even functions are very important. The reason is that they are computationally simpler than the Fourier transform. Let x(t) = e-ItI and y(t) = e-tu(t) - etu(-t). a. Plot x(t) and y(t), and determine whether they ar..
How to calculate amt of time btw Energy,max,L and Energy,max,C is stored at the resonant freq.? Are these max energy stored at the same time
The transistor is biased at 1mA and has ß=100, Cp=10pF, and Cµ=1pF. The transistor load is a resistance of 5kO. Find fo, Q, the 3-dB bandwidth, and the center-frequency gain of this single-tuned amplifier.
Consider the following discrete-time signal where the samplesare represented using N bits. a. How many bits are needed to ensure that the quantization levelis less than 0.001. b. Suppose N = 8 bits. What is the average power of the quantization noise..
Design a continuous time system to generate output y(t)=sin(wt)u(t) when the input is a unit step function. Specify the system using a differential equation.
A Si pn junction diode is described by its I-V equation, I?= Is exp (V?/V?) ,where V?=25mV, Is=10-14A . It is desired to derive constant drop and PWL models for the diode assuming an operating current between 1mA and 3mA.
A portion of the wave will reflect from the load and propagate back down the line to arrive at the input once again. Find the power that returns to the input and express this as a loss in decibels when compared to the original 10W input.
While an inductor is being energized the current flowing through it as a function of time is: i(t) = 56 (1 - e(-4600 · t) ) mA, for all times t > 0 and t is in seconds. What is the inductance, if a voltage drop of 1.188 V is measured across this indu..
How to create a eight-element row vector named vc that contains the elements of the second rows of A andthe fourth column of A?? and create a six-element row vector named vd that contains the elements of the first and fifth columns of a
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