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20 s20 signals, each of bandwidth 5 kHz and peak-to-peak range of 4 V, are sampled at their Nyquist rates, quantized uniformly, encoded using PCM, multiplexed in time domain. The multiplexed stream has the rate of 2 Mbps.(a) What is the number of levels used for quantization.(b) When a DPCM is used instead of PCM, the peak-to-peak range of differential values was found to be 0.25 V.(i) How much improvement in SNR (in dB) was achieved by DPCM over PCM?(ii) We want to exchange this improvement in SNR for reducing the transmission rate. What would be the minimum transmission rate of the multiplexed stream while maintaining SNR quality at least as good as that of the PCM system.
A series-parallel circuit contains both series and parallel connections in different arrangements. Do you find it useful to isolate the parallel sections and calculate their resistance first
Assume that the inverters have a delay of 1 ns and the other gates have a delay of 2ns. Initially A = 0 and B = C = D = 1, and C changes to 0 at time = 2ns. Draw a timing diagram and identify the transient that occurs.
Suddenly there is a short-circuit on the electric grid, and the electrical output goes to zero for 2 seconds. Calculate the increase in speed in rpm during this interval. Assume that the shaft-torque remains constant
A capacitor is formed by two metal parallel plates with the dimensions 210 mm x 210 mm separated by the gap of 1.2 um (u=micro) filled with dielectric material with relative dielectric permittivity 3.8.
A control system is needed to control a small shopping center parking lot lighting system and the exterior lighting for the building. The design specifications require that the parking lot lighting and the exterior lighting turn on at dusk automat..
A curve of radius 159 m is banked at an angle of 11°. An 810-kg car negotiates the curve at 93 km/h without skidding. Neglect the effects of air drag and rolling friction. Find the normal force exerted by the pavement on the tires.
Oil (density 0.91 g/cm^3) flows in a pipe (see fig.) and the flow rate is measured via a mercury manometer (density of Hg=13.546 g/cm^3). If the difference in height between the two legs of the manometer is 0.78 in.
The photoelectric threshold wavelength for Tungsten is 2300 Å. Find the energy in eV of the emitted electrons from the surface by ultraviolet light of wavelength 1800 Å.
A liquid level system converts a 4-10 m level into a 4-20mA current. Design a three mode controller (PID im assuming) that outputs 0-5 volts with 50% PB, 0.03 min integration time, and 0.05 min derivative time. Fastest expected change time is 0.8 ..
A 10 cm length of a K-band copper waveguide is filled with a dielectric material with er = 2.55 and tan f = 0.0015. If the operating frequency is 15 GHz, find the total loss through the guide and the phase delay from the input to the output of th..
Design a Finite State Machine which recognizes the serial pattern 111. Assume serial input is applied to input pin Sin and an output pin labeled Sout is 1 whenever the string is recognized. a) draw a state diagram of your design.
Construct a table showing the current for values of time between 0 and 9 hours at intervals of 1 hour.Hence draw a graph of i against t for 0 is smaller or equal to t is smaller or equal 9.(cannot type in proper inequality symbols)
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