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(a) An average hole velocity of 10^3 cm/sec results when 2 v is appliedaccross a 1 cm-long semiconductor bar. What is the mobilityof the bar?(b) name the two dominant carrier scattering mechanisms innondegenerately doped semiconductors of device quality(c) For a given semi" " the carrier mobilties inintrinsic material are (choose one: higher than, lower or same)those in heavily doped material. Explain why mobilities inintrinsic material are (chosen answer) those in heavily dopedmaterial.(d) Tow GaAs wafers, one n-type and one p-type, areuniformily doped such that ND(wafer 1) = NA(wafer 2) >> ni. Which wafer will exhibit the larger resistivity? explain.
There is a 50 Mhz clock signal on the FPGA board. we want to have a 1 Hz signal for testing all the designs. Find out what size of the counter we need in order to obtain this signal from the on board clock.
Light Traveling an optical fiber (n=1.44) reaches the end of the fiber and exists into air. Answer the following questions: a. if the angle of incidence on the end of the fiber is 25 degress, what is the angle of refraction outside the fiber
The total charge that has accumulated on the positive plate of a capacitor varies with time. The charge follows q=At^2 for the first 4s. a) Find the value of current at t=2,6,9,12,16 s. b) Sketch the current i(t) as a function of time
Two machines and a lighting load are connected in parallel to a 220 V, 60 Hz line. The first machine uses 40 kW of power at 0.81 power factor lagging. The second machine uses 27 kVA at 0.93 power factor leading. The lighting load consumes 13 kW.
Sizes are given as the diameter of the pizza in inches. The cost of a pizza is based on the size. Bob would like to know which size of pizza has the lowest cost per square inch. a. Identify the inputs and outputs for this problem.
The bandwidth of interest is between 0.5 and 50 Hz and has peak amplitude of approximately +/-1 mV. -a. Design and draw a block diagram (not circuit) of the signal conditioning portions (everything before ADC) of your system.
Why then do we even use JFETs as amplifiers. What is it that make them attractive even though they are non-linear. How do we minimize the effect of their non-linearity
Identify how one can generate pulse width modulation using the 9S12DG256 microcontroller. Identify various applications that require PWM. Show how microcontroller PWM interface is used to drive servomotors, and discuss these motors.
If a circuit contains 3 automatic switches and we want that, with a probability of 95%, during a given time interval they are all working, what probability of failure per time interval can we admit for a single switch
Suppose that you wish to offer a voice over IP wireless service. The target packet error rate (or drop rate) is 10^-3 and you determine that if the signal is confined to within a coherence band, about 20% of the packets are dropped due to fading.
A 1 kHz sine wave signal with a power level -10 dBm is applied to the input of the amplifier. What is the power at the amplifier output?
A 110 pF capacitor and a 440 pF capacitor are both charged to 2.2 kV. They are then disconnected from the voltage source and are connected together, positive plate to positive plate and negative plate to negative plate.
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