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Fourier Transform & Properties
x(t)is given in the below illustrated figure.
Find and plot the frequency response of x(t)
Find and plot the frequency response of x(2t)
Find and plot the frequency response of x(-2t-6)
An amplifier with 40 dB of small-signal, open circuit voltage gain, an input resistance of 1M Ohm, and an output resistance of 10 Ohm, drives a load of 100 Ohm. What voltage and power gains (in dB) would you expect with the load connected
A gallium-arsenide crystal at 200K containing only donor impurities was found to have hole concentration to be one fifth that of the electron concentration. Determine the actual carrier concentrations and the doping concentration of the crystal.
1. If 60C of charge pass through an electric conductor in 30seconds, determine he current in the conducor. 2. Determine the time interval required for a 12A battery charger to deliver 4800C.
compute the power loss in a transmission line with a resistance of 0.05 ohms/mile. Compute the power loss if 500kW of power is transmitted from a power generating station to cities at distances of 20,30,40....100 miles at 100v and 200v.
A 3-phase, 5 MVA, 11 kV, 60 Hz synchronous machine has a synchronous reactance of 10 Ohms per phase and has negligible stator resistance. The machine is connected to the 11 kV, 60 Hz bus and is operated as a synchronous condenser
A circuit that is made from a voltage source in series with the switch then in series with the parallel set of a resistor and a capacitor. The switch is originally open, it is then closed.
a load consisting of induction motor is draming 80 kw from a 220 v ,60 hz power line of 0.72 lagging .find the capacitance of a capacitor required to raise the pf to 0.92
a new semiconductor has nc 1019 cm3 and nv5 x 1018 and eg 2ev. if it is doped with 1017 donors fully ionized
Assume that the initial energy stored in the inductors shown in the circuit is zero. Find the equivalent inductance with respect to terminals a and b
A general relationship for the current density carried by electrons of density n is J = qnv, where q is the electronic charge and v is the electron velocity due to drift and/or diffusion. (a) Find the velocity of electrons, v(x), that are moving on..
A solenoid is 25 cm long, 3 cm in diameter, and carries 4 A dc in its 400 turns. Its axis is perpendicular to a uniform magnetic field of 0.8 weber per square meter in air. Using an origin at the center of the solenoid, calculate the torque acting..
Design a circuit using the transistors and other components used during the semester which provides at least 15 dB of gain. The 3dB filter points should be 100 HZ and 25 KHZ. Assume 110 Volt (AC) power supply.
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