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A silicon bar is 2 micro meters long and has 100 micro meters squared cross section. It is doped with 1x10^17 cm^3 arsenic.
a) Find the current with 1V applied at room temperatureb) How long does it take for an electron to drift from one end of the bar to the otherc) If an excess of holes is somehow introduced into the center of the bar, describe the minority carrier distribution after a time roughly equal to the minority carrier lifetimed) If the doping level was increased by a factor of 100, would the current also increase by the same factor?
A parallel circuit consists of a source and three resistors in parallel (R1=100-ohm; R2=200-ohm, and R3=300). The resistor of 100? draws a current of 500mA. a) Find the voltage across R1 b) Derive the current through R2 and R3
1.The S12G128 CPU board has one IRQ pin. You have four devices that will request interrupt service. How do you determine which device(s) need service 3.A communications channel has a bandwidth of 2,000 Hz and a signal-to-noise ratio (SNR) of 40 dB.
design op amp circuit to produce output vout which is related to inputs v1, v2 and v3 by expression vout= -(3v1+5v2+8v3). assume max permitted resistor value= 200k. use only one op amp
The input to the filter is Vin(t)=5+5cos(1000pi*t)+sin(20000pi*t)+4cos(3000pi*t) V and the output is Vout(t)=5+5cos(1000pi*t+10deg)+5sin(3000pi*t) V.
A 3-phase, 5 MVA, 11 kV, 60 Hz synchronous machine has a synchronous reactance of 10 Ohms per phase and has negligible stator resistance. The machine is connected to the 11 kV, 60 Hz bus and is operated as a synchronous condenser
In a steam plant where you work, the turbine develops 1000 kW. The heat supplied to the steam in the boiler is 2800 kJ/kg and the heat rejected by the steam to the cooling water in the condenser is 2100 kJ/kg.
Design an analog computer circuit (using minimum resistor values of 10 k ohms ) to obtain the summing (adder) function. Vo = -v1 -v2 +v3
Discuss the sequence of actions that occur in the operation of an automatic washing machine. Indicate which actions are time-driven and which actions are event-driven.
The following functions describe the oscillations in electric circuits and the vibrations of machines and structures. Plot these functions on the same plot. Because they are similar decide how best to plot and label them to avoid confusion.
a) the total charge in the device at t = 3 s, assume q(0) = 0 (round to three decimal places) b) the power consumed by the device at t = 1 s (round to three decimal places)
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.
a. Sketch the spectrum of the original signal and the sampled signal from 0 kHz and 25 kHz. b. Sketch the recovered analog signal spectrum if an ideal lowpass filter with a cutoff frequency of 4 kHz is used to filter the sampled signal. X(f) 10k 2..
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