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A Si sample is uniformly doped with phosphorus at 5 E 16 cm^-3. We make a p-n junction by implanting boron atoms into the surface layer. The implanted depth is 0.15 µm. What should the surface concentration of the boron implant be in order to obtain a p-n junction with equal concentrations of holes in the p-region and electrons in the n-region? Assume the 100% implant activation. HINT. The surface concentration is the number of atoms per unit surface area. For example, if the sample has impurity concentration of Nd=1E16 cm^-3 and is d=0.1 cm thick, then the surface concentration of impurity would be Nd*d = 1E16*0.1 = 1e15 cm^-2 (note the units for the surface concentration). B) What is the built-in voltage at room temperature?
an inventory control system that keeps track of what items are in stock when the level falls below a certain value ?
A certain engine lathe can be purchased for $330,000 and depreciated over three years to a zero salvage value with the SL method. This machine will produce metal parts that will generate revenues of $220,000 (time zero dollars) per year.
Received power of half-wave dipole antennas, Assume that two antennas are half-wave dipoles and each has a directive gain of 3dB. If the transmitted power is 1W and the two antennas are separated by a distance of 10 km, what is the received power?
Finding appropriate source for the electrical load, Have four circuits. One takes 9Vdc, two 5Vdc, and last one takes 12Vdc. Have variable transformer for source. How do I calculate or choose the voltage needed to run all four circuits with out blo..
A painter is standing on a work platform that is 27 feet above ground level. For fall protection, the worker's safety harness D-ring is attached to a 12-foot shock absorbing lanyard that is securely fastened to the structure at a point 40 feet abo..
In and Th are inputs and Out is the result. All parameters are 8-bit unsigned integers. A typical calling shows that the two inputs, In and Th, are passed on the stack and the return parameter Out, is returned in RegB.
an electric motor has an armture constant of 140, a flux of 25 mwh, an armuture current of 30 A , and a rotatio?nal speed of 1600 rpm. what is most nearly the power output in watt
A piston-cylinder device contains carbon dioxide CO2 (molar mass = 46 g/mol) as shown in the figure. The cross-section area of the piston is 0.25 m2 and the initial cylinder height is 50 cm. CO2 is initially at 40 bar and 500 oC (state 1).
Calculate the converter voltage VC1, reactive power, the converter phase current and modulation index.
What is the requirement for the phase response (transfer function) of each of these links to avoid distortion of the transmitted waveform?
Compute the rectangular form of the four-point DFT of the following signal, which is zero for n =4. Compute the inverse DTFT of: X(ω)=sinΩ cosΩ
Identify the types of system-building methods used by Dorfman to build its wireless warehouse system.
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