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Consider a cellular phone transmits data using QPSK with achannel rate of 50 Kbps, (a) what is the data rate provided? (b)What is the difference between PSK and QPSK.
Consider the signal x (t) = 10+ 20 cos (100*2 t + 4) + 10 cos (250*2 t ) A. Using Euler's relation, the signal x(t) defined by the above equation can be expressed as a sum of complex exponentials in the form X(t) = x0 + Re{k=1N Xkejk2fot}
A voice frequency massage signal (fmax=B= 4 kHz) is transmitted by three binary systems: PCM (μ = 255), DPCM (α = 10), and DM. The bit rate required is Rb = 120 kbps, and m_p2/(m2 (t))= 2 a) Determine the SNR in output of each systems in dB.
How many time units would youneed to compute all the carry bits and why. Compute all the sum bits usingthe aforementioned carry bits. How many time units would you needto complete the addition process and why.
List the eight degenerate two-level forms and show that they reduceto a single operations. Explain how the degenerate two-level formscan be used to extend the number of inputs to a gate.
The fiber has a loss of 0.25 dB/km, and there is a splice with a loss of 0.1 dB every km. The coupling loss at the receiver is 0.5 dB, and the receiver uses an InGaAs APD with a sensitivity of -39 dBm. Find the system margin.
A 250hp, 500v dc shunt motor draws a nominal field current of 5A under rated load. The resistance is 90ohms. Calculate the ohmic value and power of the series resistor needed so that the field current drops to 4.5A
Silicon is doped with 6 x 10^15 arsenic atoms/cm^3. a. At T=300K, what is the percentage increase in free electron concentration from this doping b. At the same temperature, does the hole concentration increase or decrease
if a 1mA movement has an internal resistance of 43 ohms, calculate the shunt resistance required to increase its range to 50mA and also 300mA.
A HCS12 ATD is set to 8-bit unsigned mode. A temperature sensor measuring 0 to 100 degrees with an output of 25 mV/degree is attached to the input. The ATD low voltage reference is attached to ground and the high voltage reference
If a single stage amplifier is having an open loop voltage gain of 80, input resistance of 800 -ohm and output resistance of 200 -ohm, what will be the available signal voltage across a 50 -ohm load connected at the output
Discuss the major difference(s) in operational characteristics for latches vs. flip-flops: compare the timing diagrams for the D latch and D-type positive-edge triggered flip-flop.
Show that for wires of identical dimensions but made of different materials, such as copper and aluminum, the resistance is proportional to the resistivity of the material. the resistance of a certain copper wire is 1.5.
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