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1. Write a Matlab program to confirm that the ni versus T curve for Ge and Si graphed in Figure 2.20 can be generated by employing the empirical fit relationships below. Check over the temperature range of 275K ≤ T ≤ 375K. ni(Si) = (9.15x10^19)[(T/300)^2]x e^-0.5928/kt ni(Ge) = (1.76x10^16)[(T)^3/2]x e^-0.392/kt 2. Generate a MATLAB program to compute and plot the Fermi function, f(E), and 1- f(E) versus ΔE = E-Ef for values of ΔE that is over the range of -0.5eV ≤ ΔE ≤ 0.5eV for varying temperature settings where Temperature = 150, 250, 350, 450 and 550K. Make sure that each f(E) versus ΔE curve at each temperature is superimposed on the same plot. Discuss what you see in your plots as the Fermi function, f(E), and 1-f(E) varies with temperature and energy. 3. Consider GaAs at T = 300K with Nd =0. (a) Plot the position of the Fermi energy level with respect to the intrinsic Fermi energy level as a function of the acceptor impurity concentration over the range of 1014 ≤ Na ≤ 1017 cm-3. (b) Plot the position of the Fermi energy level with respect to the valence-band energy over the same acceptor impurity concentration given in part (a). The temperature of a sample of GaAs is T = 300K and the acceptor doping concentration is Na = 0. Plot the minority carrier concentration (on a log-log plot) versus Nd over the range 1015 ≤ Nd ≤ 1018 cm-3
Design a sequential system to continuously output your set of eight different digits (01275438) in binary at the rate of one digit per clock pulse.
Sketch the spectrum of this signal indicating the complex size of each frequency component. You do not have to make separate plots for real/imaginary parts or magnitude/phase. Just indicate the complex phasor value at the appropriate frequency.
Draw a state diagram for an FSM that has an input X and an output Y. Whenever X changes from 0 to 1, Y should become 1 for two clock cycles and then return to 0, even if X is still 1. Develop both the Moore and Mealy machines.
In a right triangle, the square of the length of one side is equal to the sum of the squares of the lengths of the other two sides. Stephanie has the integer lengths of three sides of a triangle and needs to know if it is a right triangle.
If Nand gates are used throughoutand a ripple-carry design is used, calculate the delay through the adder, assuming allinputs are presented at the same instant, and counting D seconds per gate. Which outputsignal suers the worst delay
(a)find the work done in moving a point charge +2C from (2,0,0) to (0,2,0) and then from (0,0,0) to (0,2,0). (b)find the work done in moving a point charge +2C from (2,0,0) to (0,2,0) along the straight-line path joining the two points.
How can one determine whether a given signal is real-valued or complex valued from the Fourier series coefficients 1) A signal with a fundamental period of 12, and a5=1, a6=1 (rest are zeros)
A 2 GHz and 100 Watt transmitter is connected to a transmitter antenna with a gain of 12 dB. A 20 dB receiving antenna is placed 10 kilometers away, in what we assume to be free space, in the direction of maximum gain.
Design a device that creates a voltage that is a damped oscillation with a frequency of 5 radians per second and a time constant of 3 seconds. In particular, explain how initial conditions are to be handled.
A buck-boost converter works with an input voltage of 12 V and switching frequency 10 kHz. The load resistance of 24 Ω requires doubled input voltage. The inductor and capacitors are 1 mH and 100 μF, respectively.
Consider a superheterodyne FM receiver designed to receive the frequency band of 88 to 108MHz with IF frequency 10.7MHz. What is the range of frequencies generated by the local oscillator for this receiver
Examining frequency to time domain signals, A spectrum analyzer is connected to an unknown signal. The spectrum analyzer displays the power level of signals in dBm vertically and frequency horizontally. The spectrum of the unknown signal creates t..
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