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a coaxial cable can carry signals in the range 50mhz to 450mhz. The bandwidth of cable is divided into a numbe of sub-channels each occupying with the guard band, 40mhz of bandwidth. In each channel the guard band takes up 4 mhz (i.e. 2mhz either side of the sub channel, making a total of 4mhz between adjacent sub channels). If the signal to noise ratio in each sub channel is 30dB. calculate the maximum capacity of each sub-channel and hence the maximuim total capacity of the cable.
An Emitter follower with a BJT biased at Ic = 1mA and having β = 100 is connected between a source with Rsig = 20kg and a load RL = 1kg. a) find Rin, vb/vsig, and v0/vsig. b) If the signal amplitude across the base-emitter junction is to be limitd t..
Bill will have an adjusted gross income this year of $70,000. Valerie has an adjusted gross income of $1500 a month. Bill and Valerie have agreed that Valerie should continue working only until the federal income tax on their joint income tax retu..
The parameters of a certain transmission line operating at ω = 6×108 rad/s are L = 0.35μH/m, C = 40 pF/m, G = 75 μS/m, and R = 17 Ω/m => α=0.0943 Np/m, β=2.2467 rad/m, λ=2.7966 m, Z0 =93.623-j3.6368
Consider a satellite communication link with a one way propagation delay of 300ms between the sender and receiver, operating at 10Mbps using packets of length 1500bytes. Length of the ACK packet is also 1500 bytes.
Consider a continuous-time LTI system with frequency response of H(j omega) = 1 + j 250 omega/(2 - j 50 omega)2 Find the expression for the magnitude of H(j omega) and sketch its Bode plot (sketch asymptotes and the magnitude curves).
A walker's cassette tape player uses four AA batteries in series to provide 6 V to the player circuit. The four alkaline battery cells store a total of 200 watt-seconds of energy. If the cassette player is drawing a constant 10 mA from the battery..
The built-in voltage of a GaAs pn junction diode is 1.25 V when the diode's temperature is T = 320 K. The cathode region of the diode is doped with phosphorus at a concentration of 1017 cm-3. Determine the required doping concentration in the anod..
Build a circuit with the voltage input = 4 AA Batteries = 6V and the output = 3A Constant. The 3 amps output will be able to keep the TEC (Thermoelectric Cooler) on constantly. Try not to use any resistors/voltage regulators.
Consider an LTI system with impusle response h(t) = e^(-.2t)*(u(t-1)-u(tt-8)) a) plot h(t - tau) for various values, make sure you show how the parameter t influences the position of the curve in the graph. b)Find the output y when the input is x(t) ..
A particular intrinsic semiconductor has a resistivity of 50 -cm at T=300 K and 5 - cm at T=330 K. Neglecting the change in mobility and effective density of states with temperature, determine the bandgap energy of the semiconductor.
Design a differentiator to have a time constant of 10^(-2) s, and an input capacitance of 0.01 Micro F. What is the gain magnitude and phase of this circuit at 10 rad/s, and at 10^3 rad/s.
You also do not need to consider radiation heat transger in the calculations. However, you should consider how the resuts for the no-fin cases might change if radiation heat transfer is included in the analysis Calculate the circuit board temperat..
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