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show that the resistivity of intrinsic Ge at 300k is 44.44 ohm-cm. If donor impurity is added to an extent of 1 atom per 10^8 Ge atoms, prove that the resistivity of the Ge sample drops to 4.42 ohm-cm (at 300k). Assume that the electron mobility is 3800 cm^2/v*s, and the hole mobility is 1800 cm^2/v*s; ni=2.5x10^13 electrons per cm^3; and, number of G2 atoms per cm^3=4.41x10^22.
design a new p-type semiconductor material. Acceptor density is Na=5x1015 cm^-3 and there are no donors are present in the material. The effective densities of states for this material is given as Nv=1.8x10^19cm^-3
how do we determine the direction of current in a multiloop circuit with more than one source of e.m.f?
a ppl frequency synthesizer has an output frequency of 470 MHz. A divideby10 prescaler is used. The reference frequency is 10 KHz. what is the frequency step increment
HALF-ADDER: S = XY' + X'Y , C = XY (These are the outputs) 1. From the equation given for half-adder, develop an equation for which the half-adder can be constructed just with NAND gates. Draw the circuit as per the equation obtained.
There are 5 inductors in series and they are 1H,2H,3H,4H,5H what is the total equivalent inductance. There are 5 capacitors in series and they are 1F,2F,3F,4F,5F. what is the total equivalent capacitance.
A transformer on no load takes 4.5 A at a power factor of 0.25 lagging when connected to a 120V, 60Hz supply, the number of turns of the primary winding is 250. Calculate the magnetizing current, core losses and the maximum value of flux in the co..
A system has the following input/output relation: y(n) = x(n) + .5 y(n -1). If the input x(n) is the sinusoidal signal shown in problem 1.32(d) (Above), the steady-state output will have the following form: y(n) = A sin(Bn+C). Determine the value ..
2) A device that responds to a small current or voltage change by activating a mechanical switch allowing a larger amount of current flow is 3) Where does a program transfer to when an interrupt occurs Interrupt vector table Interrupt service ro..
Why then do we even use JFETs as amplifiers What is it that make them attractive even though they are non-linear? How do we minimize the effect of their non-linearity
1.Explain aluminum migration in device contacts, and propose possible solutions for the aluminum spikes caused by the migration. 2.What are the two methods for the first step of impurity doping Why a second drive-in step is needed
The range of an analog signal is 2 Vpp, and the samples of this signal are being quantized. The quantizer-output word size is 10 bit. What is the quantization interval Q
Seawater with a specific weight of 64.0 lbs/ft^3 is at a level of 4 feet above the centerline of the exit pipe. The tank is closed at the top and there is a pressure of 1 psig above the seawater. What is the velocity at the end of the pipe
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