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A laser diode has a threshold current of 12 mA and emits at 3 mW/mA rate. A diode current of 15 + 5sin ωt (mA) produces an optical signal, which is coupled into a SI fiber having a loss rate of 2-dB/km and a numerical aperture of 0.24. After 10-km propagation length, an erbium-doped fiber amplifier having a noise figure of 6 and a gain of 15 dB amplifies the signal. The signal output of laser has a 50-dB signal to noise ratio (SNR). Compute the signal power (in dBm) and signal to noise ratio (in dB) at the amplifier's output.
Design an FSM that realizes a three-bit Gray-code counter, which counts in the sequence 000, 001, 011, 010, 110, 111, 101, 100, 000
If you are now told that the material is copper and one cylinder has length 5 cms and radius 1mm, what is its resistance. You will have to locate the resistivity for copper and give me the reference source.
Adding dopants to a sample of silicon is found to reduce the Hall coefficient by a factor of 10 and increase the conductivity by a factor of 5. What effect has this dopant addition had on the mean free path
(a) Determine the values of the voltage and current phasors in polar form. (b) Calculate the instantaneous voltage at a time 0.8 ms after it crosses the zero-value axis in a positive going direction.
Assume that the cruise control system of an automobile analyzes the speed and the acceleration of the vehicle to operate. To transmit this information to the cruise control unit, an analog computer unit is required.
Design a 2-bit Ripple Carry Adder (RCA) using half adders or full adders as building blocks. You may use NOT gates, ANDgates, and OR gates only. Do not use XORor XNOR gates. There is no restriction onthe number of inputs to the AND and OR gates.
Suppose we want to construct a parallel plate capacitor of C= 1[F] using square plates. (a)If the dielectric is air (Xr= 1), and the plates are separated by 1 cm, what dimensions will the plates have
An infinitely long wire is placed in a space with relative permeability of 9000 carrying current of 1.9 A in the +y direction. What is the magnitude of the magnetic flux density at (0.03,0,0) [meters] in units of Tesla
A high-pass filter with C=30pF. R= 40 kohm A) What is the cutoff frequency The output of this filter is connected to an amplifier with an input resistance of 60 kohm. B) Sketch and label the new circuit. C) What is the new cutoff frequency
The factorial n! of a positive number (integer) is defined by: n! = n(n-1)(n-2)...3*2*1, where 0! = 1. Write a user difned fuction that calculates the factorial n! of a number. For the function name and arguments use y = fact(x)
design a two stage amplifier to meet the following specs undistorted outputat least 10vp-p bandwith from 20hz to
1.)An op amp requires the design equation Vout = 5Vin & 2Vref + AgVg. What is the value of Ag 2.)The voltage dropout of a voltage regulator is 1.6 V. If a 16 V output is required, what is the minimum regulator input voltage
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