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Problem 1: Consider a thermal-noise limited analog optical fiber system that uses a pin photodiode with a responsivity of 0.85 at 1310 nm. Assume the system uses a modulation index of 0.5 and operates in a 5-MHz bandwidth. Let the mean-square thermal noise current for the receiver be 2 * 10-23 A2/Hz. What is the peak-to-peak signal power to rms noise ratio at the receivers when the average incident optical power is-20dBm?
Problem 2: Consider a quantum-noise-limited analog optical fiber system that uses a pin photodiode with a responsivity of 0.85 at 1310 nm. Assume the system uses a modulation index of 0.6 and operates in a 40-MNz bandwidth. If we neglect detector dark current, what is the signal-to-noise ratio when the incident optical power at the receiver is -15dBm?
What is the smallest frequency that can be used to sample each of the following continuous-time signals such that the signal can be recovered from the discrete samples (a) \(x(t)=1+cos(2000\pi t)+cos(4000\pi t)\)
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
Discuss which display technologies would be most appropriate for viewing DVD movies in the following situations. (i) A home entertainment system in a living room (ii) A personal seat-mounted display on an aircraft
consider a cartesian co-ordinate system on a plane the plane lines on the x- and y-axis. a current of 100 a is
i have 3 questions in the attached file can you solve it????? ltbrgt ltbrgtthe deadline will be 792014 10am
1) When discussing the generation of electron/ hole pairs by light in semiconductors is it best to use the wave or particle rendition of light energy. 2) In what type of electron transition from valence to conduction band is momentum conserved, dir..
For loads causing more than 1 V to appear across the generator, the output current is no longer assured but will be reduced by some unknown amount. This circuit limitation, occurring, for example, at the peak of a sine wave signal
A part hollow non conducting sphere has a uniform volume charge density of 200 nC/m2. Find the potential difference between the inner surface at r=2cm and outer surface at r=5cm
a. Describe in your words why I_G is effectively 0A for a JFET transistor b. Why is the input impedance to a JFET so high c. Why is the terminology field effect appropriate for this important three- terminal device
A full wave rectified current has a peak value of 20 A and a period of 2ms. Assume the current is flowing in a 50 ohm resistance. Tabulate frequency, peak values and average powers of the first four nonzero compoents in the spectrum.
Determine the output voltage for an op-amp comparator circuit with a non-inverting input reference voltage of + 2 VDC and an inverting input signal of - 1 VDC. The op amp reaches output saturation voltages of + or -13 V at the limits.
A manufacturer specification sheet lists the transfer function of a pressure sensor as 45±5% mV/kPa with a time constant of 4±10%. A highly accurate test system applies a step change of pressure from 20 kPa to 100 kPa.
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