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A transistor amplifier has a midband gain of -120, a high cutoff frequency of 36KHz, and a bandwidth of 35.8 KHz. In addition, the actual response is also about -15 dB at f=50Hz. Write the transfer function Av for the amplifier.
(a) Determine free electron and hole concentration.(b) Calculate the effective density of states at valence band, Nv. Given that ni = 1x1010 cm3 and kT = 0.026.
Find the attenuation constant alpha, the phase constant beta, and the phase velocity u if the conductivity of the material sigma=(omega)(epsilon), the material parameters are Ur=1, epsilon r =2.5, and the wavelength in free space is lamda naught =..
Determine a suitable sampling frequency. Design a notch filter to remove the 50Hz component, paying particular attention to any assumptions you have made in the design.
Assume two cables have wire strands that are the same diameter and made of the same material. If one cable has 7 strands and another has 19 strands, which will have more resistance over a mile
if x = 0, the counter counts 1,2,3,4,5,6,7 and repeats. if x = 1, the counter counts 7,6,5,4,3,2,1 and repeats. The counter should be designed using D Flip FLips and the one hot method. Draw the asm chart and final logic diagram.
Find the Laplace transform of a rectangular voltage pulse that is 0 V until time 0 s, then jumps to 5 V and stays there until time 2 ms, then returns to 0 V and stays there after time 2 ms. Hint: express the pulse in terms of unit step functions.
Assume CMOS inverter propogation delay is 100 pico seconds. Design a one input/ one output pulse generating circuit which will generate 600 pico seconds wide pulse at the output each time the input changes from one logic to another.
calculate the minimum sampling interval (time period for counting the pulse train) to achieve a speed resolution of 5 rpm, and the number of bits that must be there in the binary counter if the pulse train is to be sampled with this interval for a..
In class we saw an example of 'Beat note'. In this problem we consider a more general case. Let fc > 0, fd > 0 and define a signal x as.
An a.c. voltage, V, comprises of a fundamental voltage of 100 V rms at a frequency of 120 Hz, a 3rd harmonic which is 20% of the fundamental, a 5th harmonic which is 10% of the fundamental and at a phase angle of 1.2
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
A load impedance ZL = 100 + j80 is to be matched to a 75 ohm line using a single shunt-stub tuner. Find two designs using open-circuited stubs. Include both smith chart and analytical analysis.
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