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A limited source diffusion is used to define the base of an npn transistor. Estimate the starting concentration of impurity if the base-collector junction lies 1micro-meter below the surface after 2h diffusion at 1100 degrees C. The diffusion constant of Boron at this temperature is 2*10^-17 m^2 s^-1. A background donor concentration of10^22 m^3 may be assumed.
In a game, half of the (large) pool of potential opponents are beginners, a third intermediates, and one sixth are masters. Your chances of beating them are 60% for beginners, 30% for intermediates, and 10% for masters.
A lossless transmission line of electrical length l = 0.3? is terminated with a complex load impedance . Find the reflection coefficient at the load, the SWR on the line, the reflection coefficient at the input of the line
An otherwise-ideal op amp, known to have an open loop gain of 10^4 V/V , is measured in a circuit to have an output voltage of -3 V. While it would be difficult to measure, what would you expect the voltage from the negative terminal
A current of 4 A flows through a wire forming a "loop" circle of radius r. If the magnetic field in the center of the "loop" is 10 A, what is the radius along the "loop": a) if the loop consists of a loop of wire, b) if the "loop" consists of 20 t..
The parking lot of the Spenditall Megamall has an area of 128 ac. It is partially landscaped to provide some areas of grass. Assume that an average of 63% of the water that falls on the parking lot will flow
What sort of waveform does the input signal have? Is the input signal periodic or non-periodic? If the input waveform is non-periodic, what is its pulse width?
The design of a home security system requires the use of sensors, including a sensor to measure carbon dioxide levels. Your search resulted in one sensor that provides an output range of [-2V, 1V].
A chopper is used to control the power flow from a dc source voltage of 125-V to a battery whose voltage is 240-V. The power transferred is 60 kW. Determine the duty cycle and the average input current.
what is the shortest possible line length that would exhibit the desired reactance at its input?
Consider a zero-phase sine function, x(t), with frequency ?=1.3rad/sec. What is the minimum positive time shift needed to turn this function into a zero-phase cosine of the same frequency
Compare the by hand solution and the PSPICE simulation for a voltage amplifier which has an input resistance of 10kohms and an output resistance of 100ohms, and a gain of 100V/V. The voltage amplifier is capacitively coupled to a voltage source.
Probability of a False Alarm: Noise Power, The fixed threshold of a radar detector was set, assuming a known noise power, to yield P_FA = 10^-6
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