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In a certain n-type region of a semiconductor in thermal equilibrium, there is a hole concentration with the following spatial distribution:
po(x)=103(1 9×103x)cm 3 for0 x 10 4 withxincmAssume that in this region, the electron mobility and hole mobilities are n = 500 cm2/V ·s
and p = 200 cm2/V · s, respectively.
a) Derive an expression for and sketch the hole diffusion current density in this region.
b) Derive an expression for and sketch the hole diffusion velocity in this region.c) Derive an expression for and sketch the electric field distribution in this region.d) Derive an expression for and sketch the hole drift velocity in this region.
e) Derive an expression for and sketch the electron concentration in this region.f) Derive an expression for and sketch the electron diffusion current density in this region.
g) Derive an expression for and sketch the electron diffusion velocity in this region.
A hydroelectric power plant has a synchronous generator who's speed must be fixed at 180 r/min. The turbine is Pelton type with 10 m runner diameter. When the flow rate at the nozzle of the penstock is 10m^3/s, the generated electricity.
What is the minimum donor doping required to convert Silicon into a conductor? What is the minimum acceptor doping required to convert Silicon into a conductor?
1. Determine the peak-to-peak current ripple in the output inductor for a forward converter and determine the output voltage ripple of the converter. We know the following parameters: duty cycle d, input voltage Vin, turn ratio.
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The voltage output from a two active gage of Wheatstone bridge was 3.5 mV. The excitation voltage was 5 V. Nominal resistance of the strain gage was 350 ohms and the gage factor was 2.05. Calculate the force in pounds on the steel rod.
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A signal x[n] is formed by sampling a signal x(t) = -4sin(200*pi*t) at a sampling rate of 400Hz. Graph x[n] over 10 fundamental periods versus discrete time. Then do the same for the sampling frequencies of 60 and 200Hz.
The plant contains six 288MW generators. Given the overall facility efficiency is 76%, and the plant is capable of full output for a duration of 5 hours, determine the potential energy of upper reservoir and the minimum amount of water in gallons ..
A control system for positioning the head of a floppy disk drive has the closed-loop transfer function T(s)=11.1(s+18) / (s+20)(s^2+4s+10). Plot the poles and zeros of this system and discuss the dominance of the complex poles.
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.
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