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1. Which, if either, is a better anti-aliasing filter: a Chebyshev filter or an inverse Chebyshev filter? Fully justify your answer.
2. Consider the following specifications for bandpass signals. For each case, find the minimum permissible sampling rate and the ranges of sampling frequency that will allow reconstruction of the bandpass signal from its uniform samples.
(a) f1 = 50 kHz and f2 = 70 kHz
(b) f1 = 17.5 kHz and f2 = 22.5 kHz
(c) f2 = 25 kHz and B = 10 kHz
(d) f1 = 4 kHz and B = 6 kHz
(e) f1 = 50 kHz and f2 = 100 kHz
What idea leads to the digital signal which filters directly in the time domain and thus avoids transformation into the frequency domain and back again my means of the FFT?
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An N-type silicon substrate with the doping density of 1x10 15 cm-3 Arsenic is to be converted into p-type by Boron diffusion, so that the resistivity at T=75C is 5 O-cm. All atoms are fully ionized.
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If the frequency of a signal is 120 Hz and the sampling frequency is 150 Hz, what is the aliased frequency of the signal
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a binary transmission channel introduces bit errors with probability 0.15.estimate the probability that there are 20
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an unknown semiconductor has Eg=1.1ev and Nv=Nc.it is doped with 10^15 donors,where the donor level is 0.2ev below Ec. given that Ef is 0.25ev below Ec, calculate ni and the concentration of electrons and holes in the semiconductor at 300k.
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