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An ideal n+/p diode has only the quasi neutral p region of length L illuminated with light such that GL electrons/cm3-s are generated uniformly throughout the region. There is no photo-generation occurring elsewhere in the diode. Derive the current vs. applied voltage VA for thisdiode by answering the following questions. Since the diode is n+/p, we need only determine excess carrier concentration on the p side of the device.a) Following the ideal diode derivation, where in the diode will the current density be evaluated?b) What is the simplified form of the minority carrier diffusion equation in the quasi-neutral p region of the diode? What is the general form of the solution?c) What are the boundary conditions for the quasi p region of the diode assuming an external voltage VA is applied and light is illuminated on the p side? Assume L approaches an infinite value (i.e. L >> Ln ) and any injection of excess carriers is low level.d) From the general solution and the boundary conditions, determine the expression for the I-V characteristics of this photo-diode.
Sketch the schematic for a RC low-pass filter with a 3 dB cutoff frequency of 500 Hz, i.e., the output at 500 Hz is 1/2 = 0.707 of the filter output at DC. What RC time constant must the filter have
A dc motor takes an armature current of 105 A at 480 V when running at 720 rpm . The resistance of the armature circuits is 0.2 Ω and the field resistance is 96 Ω what is the torque developed in the armature
Design an amplifier using a JFET and a 20V power supply. Calculate the required resistor and capacitor values for the circuit, assuming a minimum frequency of 10 Hz.
The band-limited continuous signal x(t) is sampled with impulse train p(t) with sampling period of T seconds. The output of the sampling circuitry is converted to sequence and is passed through a discrete time system with input of yin[n]
Compute the power absorbed by an element in a circuit, but for a simple sinusoidal current i = sin(2πt/T) where T = 1 s.
A. There are three part conveyor lines (1-2-3) feeding a main conveyor. Each of the three conveyor lines has its own counter. Construct a PLC program to obtain the total count of parts on the main conveyor. B. Add a timer to the program that will ..
B.) Write an equation for v(t) for t > 0 C.) Write an equation for the power absorbed by resistor for t >= 0 D.) Find how much energy the resistor disspates for t >= 0 E.) How much energy is stored in capacitor at t=0
A 250ft^2 shell and tube heat exchanger was purchased fo $13,500 in 1994 when the index value was 830. Estimate the cost of a 150 ft^2 shell and tube heat exchanger in 2010 when the index calue is 1,029 and the appropriate factor is 0.6.
Construct a truth table for the following specifications: if any two consecutive switches out of four on-off switches in a row are on, then a light is on; otherwise, the light is off. Denote the switches in order as a, b, c, d,
A 50 ohmlossless air transmission line is terminated in a load impedance ZL = 12.5 + j20 ohm. Find the following using a Smith Chart: the load admittance YL. the closest distance to the load plane where the normalized admittance on the line is 1 + j..
A three phase synchronous generator operates onto a grid bus of voltage 33 kv (line to line). The armature reactance of the machine is 2 ohms per phase and the leakage reactance is 3 ohms per phase.
The time to failure of fluorescent lights in a large office building is exponentially distributed with a failure rate of 0.03125 hours. How many spare tubes must the building custodian maintain to have at least a 0.95 probability of replacing all..
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