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Suppose the FCC allocates 300 kHz channels for a high quality video conference service. A service provider decides that this service requires 720 kbps (not including overhead and error control) for each channel. a. Specify a modulation format (other than OFDM) that can provide this service along with the symbol rate and signal constellation. Allow for at least 25% excess bandwidth.
A pn junction diode has Vd= 690 mv, C=6pF, Id= 500 microamps, Vt=.0259 V. It also has C=4pF when Id= 100 microamps. Derive the complete high-frequency model when Vd=610mV.
(a) Identify the problem with this data. (b) How would the transmitter fix the problem. (Write down the sequence as it would be transmitted.) (c) What would the receiver do to the received bit sequence
A D'Arsonval meter movement is described by its fullscale current Ifs and full scale voltageVfs , with Vfs= 100mV andIfs=10mA . Determine the resistanceRm of the D'Arsonval meter movement.
The electron distribution in the conduction band peaks at energies close to the conduction band edge. Using the Boltzmann approximation, find the energy in the conduction band (as a function of temperature) at which the electron density peaks
draw out a schematic that implements a 3-bit XOR gate, but consisting of only 2-bit NAND gates. Your schematic should have from 8-10 NAND gates, but NO other logic function such as OR, AND, INV gates can be in your final design.
A platinum RTD with α = 0.0039 is used with an instrument designed for α = 0.0037. Determine the indicated temperature of the instrument when the actual temperature is 99ºC.
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)
An internet access provider (IAP) owns two servers. Each server has a 50% chance of being "down" independently of the other. Fortunately, only one server is necessary to allow the IAP to provide service to its customers
Current, voltage, and power to a three phase system are measured and found to be 20 A, 550 V and 10.5kW respectively. Determine equivalent circuits per phase as follows: (a)wye connected series combination of resistance and reactance in each phase.
it is found experimentally that electric field in certain region of earth's atmosphere is downward. at an altitude of 300m the field is 58N per C and at altitude of 200m it is 110N per C. Find the net amount of charge contained in a cube 100m on e..
What degree of matching in emitter area is required for the base-emitter voltages of two bipolar devices with identical collector currents to have a difference of less than 5.0mV. Use VT= 25.85mV.
Design a series resonant circuit to have a bandwidth of 400 Hz using a coil with a Ql of 20 and a resistance of 2. Find the values of L and C and the cutoff frequencies.
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