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Construct a block diagram and an ASMD chart for digital system thatcounts the number of people in a room. The one door through whichpeople enter the room has photocell that changes a signal x from 1to 0 when the light is interrupted. They leave the room from asecond door with a similar phot0cell that changes a signal y from 1to 0 when the light is interrupted. The datapath circuit consistsof an up-down counter with a display that shows how many people are in the room.
If we wish to design a communication system which carries voice securely, we need to ensure that others cannot tap into the conversation. In digital transmissions, we can do this by encryption.
Determine whether the following signals are periodic. If they are, find the smallest periods (fundamental periods). a) f(x,y) = sin (2 pi x) cos(4 pi y) b) Discrete signal: f(m,n) = sin ( pi * m / 5) cos(pi * n / 5)
Suppose you want to use external components to configure a comparator in order to provide hysteresis for the input. Show how you would configure such a comparator with hysteresis input.
If the energy gap separating the valence and conduction bands in diamond is 5.4 eV, what is the maximum wavelength (in metres) of radiation that can be absorbed by this material
Explain why the short-circuit method for determining the Thevenin resistance of a circuit cannot be applied if the circuit does not contain any independent current or voltage sources.
The cutoff frequencies of a series resonant circuit are 5400 Hz and 6000 Hz. a. Find the bandwidth of the circuit. b. If Qs is 9.5, find the resonant frequency of the circuit. c. If the resistance of the circuit is 2-ohm, find the value of X and XC a..
The signal m(t)=6sin(2*pi*t) volts is transmitted using 4-bit binary PCM system. The quantizer is of the midriser type, with a step size of 1v
A pulse width modulation (PWM) circuit works by varying the duty cycle of the square wave while keeping the period fixed.
The random variable X is a continuous type distribution F(x). Use the function y=F(x) to transform random variable X into a new random variable Y=F(x). Find the density function that describes random variable Y.
A sinusoidal voltage source is zero at t = 0.2 microseconds and is "going positive" at that point, meaning that v(t') > 0 for t' = 0.21 microseconds. Furthermore, the voltage at t = 0 is -28 milliVolts and its next zero is at t = 8.2 microseconds
What is the data rate of a digital electrical communication system that uses 16 voltage levels to carry multiple bits with one voltage level, where each voltage level is kept at that level for a duration of 2 ms
calculate the short-circuit current of a three-phase delta-wye connected transformer if the short circuit occurs between phase A and the neutral at the low voltage side, and the transformer is supplied by a 13 kV line-to-line voltage.
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