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A p-type wafer has a diffused Phosphorous n-type junction with a junction depth of 0.15µm.
a) If the wafer (no pre-existing oxide) is to be oxidized at 1000 C for two hours to form a ‘dense, non-porous, high-quality' gate oxide. What is the gate oxide thickness achieved in this case?
b) At the subsequent step, the wafer is further oxidized at the same temperature to form another 0.1µm ‘low quality' oxide. What is the time needed to complete this ‘faster' process?
c) Does the original junction exist? Justify your answer in terms of assumptions you made.
Gold cost about $100 an ounce in 1971. In 2007, the cost of an ounce of gold is hovering around $800. compute the average price increase for gold.
i) Calculate the number of calls/hour/cell and the number of calls/hours/km2 ii) Calculate the number of users/hour/cell and the number of users/hours/channel iii) Find the modulation frequency for this system.
Assume a buck converter contains a synchronous rectifier. Does it operate in the discontinous conduction mode at light load Why What does the inductor current waveform look like
A 150 MHz uniform plane wave in normally incident from air onto a material whose intrinsic impedance is unknown. Measurements yield a standing wave ratio of 3 and the appearance of an electric field maximum at 0.3 wavelengths
Write a simple shell script called mathmagic that takes two arguments in at call time and returns to the stdout the value of the two items entered, the value of the two items added together, the value of the two items subtracted
determine the equivalent impedance of the transformer referred to the high side (assume the equivalent resistance is negligible). Hint: draw a phasor diagram showing I E V and the impedance drop.
A signal has a fundamental frequency of 1000 Hz. What is its period? Assume the signal has a peak amplitude of 1 Volt and that the instantaneous power is equal to the square of the voltage, then compute the average power of the fundamental frequen..
Point A is at an electrostatic potential of +1V relative to point B in a vacumm. An electron initially at rest at B moves to A. What energy (in J and eV) does the electron have at A What is its velocity
An engineering firm consisting of 3 programmers and 6 circuit engineers. The employees are randomly assign to 3 teams of 3, labeled Group 1, Group 2, and Group 3. a) How many ways are there to assign the 9 employees to Groups 1, 2 & 3
A four-bit binary number is represented as A3A2A1A0, where A3, A2, A1, and A0 represent the individual bits and A0 is equal to the LSB. Design a logic circuit that will produce HIGH output whenever the binary number is greater than 0010 and less t..
A star-bus hybrid topology consists of a main three branch star toplogy with each branch connecting three stations in a bus topology. This toplogy is changed to a new bus-ring hybrid topology with main five station bus topology.
An AM signal has an unmodulated carrier voltage VC = 10VP, a load resistance of RL = 10, and a modulation index of m = 1. Determine Write down the frequency components of the received AM signal.
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