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a) Draw a sketch of the spectrum ofx(t) = sin3(400πt)Label the frequencies and complex amplitudes of each component.
(b) Determine the minimum sampling rate that can be used to sample x(t) without aliasing for any its components.
Give a narritve for a cruise control system of a car. Include all relevant inputs and outputs. Design a flowchart and ladder diagram. Every element on the ladder diagram must be labelled and described.
Two bar magnets are placed in a straight line with their morth poles 5 cm apart. (a) what is the force of repulsion if M1=25.1*10^-5 Wb and M2=6.28*10^-5 Wb. (b) what is the field intensity at the M2 north pole as a result of the M1 north pole.
Give a different equation, in terms of the input and output, to describe the system. Is the system stable?
Sketch the baseband signals for the two users when user 1 sends the bits 011, and user 2 sends the bits 101. Add the signals for the first bit only, and show that the output of the correlator for user 1 is -4, corresponding to a 0
The sampled signal is passed through an ideal LPF which rejects all frequencies above 8 kHz and has a gain Ts. Les sR(t) be the output of the LPF. Sketch LT[sR(t)], in which FT[] denotes the Fourier Transform, in frequency domain.
In a magnetic storage device, three attempts are made to read data before an error recovery procedure that repostions the magnetic head is used. The error recovery procedure attempts three repositions before an "abort" message is sent to the opera..
They melt when 3.9 × 104 J of heat is added to A and when 11 × 104 J is added to B. (a), (b) Determine the latent heat of fusion for the substance from which each object is made. (c) Find the heat required to melt object A when its mass is 7.4 kg.
define a one-dimensional potential well having energies U as a function of position x as follows: U=infinity for x= -1nm to x=0; U=0 eV for x=0 to x=5nm; U=10 eV for x=5nm to x=7nm; U=0 for x>7nm and x
3) What is the RMS voltage of the source in a single loop series circuit if Irms = 1A-30° and Ztotal = 100 65° 4) What is the power dissipated by an electric heater with a resistance of 20? drawing a current waveform of i(t) = 10 sin(60t) Amps
An FSK system with Rb = 110bits/sec is transmitted over an RF Channel with white noise. The receiver uses non-coherent detection. If Eb/N = 5dB, evaluate Pb for this system.
Assuming dopant atoms are uniformly distributed in a silicon crystal, how far apart are these atoms when the doping concentration is a) 10l5 cm-3, b) 1018 cm-3, c) 5times1020 cm-3. Estimate the resistivity of pure silicon in Ohm-cm
A pn-junction is formed in silicon by doping one side with acceptor atoms at concentration Na = 10^19 cm^(-3) and another side with donor atoms at Nd = 10^18 cm^(-3). What is the dopant concentration on the p-type side and on the n-type side
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